Which would be most likely be the pH of a highly-corrosive acid?

a) 1
b) 5
c) 8
D) 11

Answers

Answer 1
1
the lower the number the higher the ph and the more acidic it is
Answer 2
I believe that it will be 1?

Related Questions

In [cu(nh3)4]co3, how many 3d electrons does copper have?

Answers

Copper has a total of 29 electrons which would place the atom on the 29th number in the periodic table. In [Cu(NH₃)₄], there are 9 3d electrons of copper. The electron configuration of copper is [Ar] 4s² 3d¹⁰ but since there is a sub shell of its figuration that indicates only 1 electron filled, and since it is in the law that an electron must be paired up with another electron no matter how completely filled is the last sub shell, that is why the ast electron was given up to the other sub shell making it 9. The d shell can occupy around 10 electrons so it means that copper is a stable atom in the 3d sub shell. When you add [Cr(H₂O)₆]³⁺ (aq) and NH₃ (aq) a green solution because both are aqueous in form, you will get a purple solution containing [Cr(NH₃)₆]³⁺ (aq) and H₂O (l). 

What is the difference between h+ concentration in an acidic solution such as lemon juice (ph 2) and a basic solution such as household bleach (ph 13)?

Answers

The pH of solution is calculated using the formula:

pH = - log [H]

where [H] is the concentration of H+ ion in molarity

 

H+ concentration when pH = 2:

2 = - log [H]

[H] = 0.01 M

 

H+ concentration when pH = 13:

13 = - log [H]

[H] = 1 x 10^-13 M

 

The difference is therefore:

0.01 M - 1 x 10^-13 M = 0.01 M

 

The concentration at pH=13 is so small that it can be considered negligible.

Answer:

The pH of solution is calculated using the formula:

pH = - log [H]

where [H] is the concentration of H+ ion in molarity

H+ concentration when pH = 2:

2 = - log [H]

[H] = 0.01 M

H+ concentration when pH = 13:

13 = - log [H]

[H] = 1 x 10^-13 M

The difference is therefore:

0.01 M - 1 x 10^-13 M = 0.01 M

The concentration at pH=13 is so small that it can be considered negligible.

Explanation:

A 13.00 g sample of a compound contains 4.15 g potassium (k), 3.76 g chlorine (cl), and oxygen (o). calculate the empirical formula.

Answers

To solve this problem, let us all convert the mass of each element into number of moles using the formula:

moles = mass / molar mass

Where,

molar mass K = 39.10 g / mol

molar mass Cl = 35.45 g / mol

molar mass O = 16 g / mol

and mass O = 13 g – 4.15 g – 3.76 g  = 5.09 g

 

moles K = 4.15 g / (39.10 g / mol) = 0.106 mol

moles Cl = 3.76 g / (35.45 g / mol) = 0.106 mol

moles O = 5.09 g / (16 g / mol) = 0.318 mol

 

The ratio becomes:

0.106 K: 0.106 Cl: 0.318 O

We divide all numbers with the smallest number, in this case 0.106. This becomes:

K: Cl: 3O

 

Therefore the empirical formula is:

[tex] KClO_{3} [/tex]

Write the ions present in a solution of na3po4.

Answers

The ions present in the solution of Na₃PO₄ are:
3Na⁺¹ and 1PO₄⁻³
 there are 3 sodium ions (Na⁺¹) are present, these are cations (+).
And 1 phosphate ion (PO₄⁻³) is present, this is anion (-),
When these cations and ions meet together a compound is formed, in this case 3 sodium ions make a bond with 3 oxygens of phosphate and makes a compound of sodium phosphate.

The ions present in the solution of [tex]\rm Na_3PO_4[/tex] will be [tex]\rm Na^+\,,\;PO_4^-\;,\;H_2PO_4^-\;,\;HPO_4^2^-[/tex].

The solution of [tex]\rm Na_3PO_4[/tex] will results in the dissociation of the molecule.

The dissociation will be:

[tex]\rm Na_3PO_4\;\rightarrow\;3\;Na_+\;+\;PO_4^-[/tex]

Thus the dissociation will result in the 3 sodium ions and 1 phosphate ion. The phosphate ion in the water solution will form phosphonium ions as well.

Thus the ions in the solution will be:

[tex]\rm Na^+\,,\;PO_4^-\;,\;H_2PO_4^-\;,\;HPO_4^2^-[/tex].

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Which statement highlights a unique role of water in a biological system

Answers

The statement that has a places of interest in the unique role of water in a biological system is that water provides organisms a medium to transport materials. A transport system is describing by which materials are stimulated or transport from an interchange surface or altercation surfaces to cell situated entirely over the organism. The medium used in transport is water based which comprises materials including the various size and shapes of molecules that can be carried out. The water stands as a solvent for an extensive range of substances and runs simply at the temperatures of living organisms and plants. An examples of transport in animal transport systems consist of blood, lymph and hemolymph. . 

When the following reaction is balanced the coefficient in front of carbon dioxide is: ____ C5H12 + ____ O2 → ____ CO2 + ____ H2O

Answers

The coefficient in front of CO2 in the reaction: C5H12 + 8O25CO2 + 6H2O is 5.

BALANCING A CHEMICAL EQUATION:

To balance a chemical reaction means to make sure that the number of atoms of each element on both sides of the equation is the same.

To balance a chemical reaction, we make use of coefficients, which are numbers placed in front of the element.

In the reaction given as follows: C5H12 + O2CO2 + H2O, the number of atoms of carbon, hydrogen, and oxygen are not equal on both sides of the equation.

The balanced chemical equation is as follows: C5H12 + 8O25CO2 + 6H2O. This shows that the coefficient in front of carbon dioxide is 5.

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Final answer:

The coefficient in front of carbon dioxide (CO2) when balancing the reaction C5H12 + O2 → CO2 + H2O is 5, as we need 5 CO2 molecules to match the 5 carbon atoms in C5H12.

Explanation:

To find the coefficient in front of carbon dioxide (CO2) when the given reaction C5H12 + O2 → CO2 + H2O is balanced, we first balance carbon (C) and hydrogen (H) atoms, since they appear in only one reactant and one product each. Then we adjust the oxygen (O) atoms. For the given reaction:

Balance carbon atoms: There are 5 carbon atoms in C5H12, so you need 5 carbon dioxide molecules to balance them. This gives us a coefficient of 5 for CO2.Balance hydrogen atoms: There are 12 hydrogen atoms in C5H12, so you need 6 water (H2O) molecules to balance them. This gives us a coefficient of 6 for H2O.Balance oxygen atoms: Now count the total oxygen atoms in the products: 5 CO2 molecules contribute 10 oxygen atoms, and 6 H2O molecules contribute another 6, for a total of 16 oxygen atoms. Since each O2 molecule has 2 oxygen atoms, we need 8 O2 molecules to get 16 oxygen atoms. This gives us a coefficient of 8 for O2.

The balanced chemical equation is:

1 C5H12 + 8 O2 → 5 CO2 + 6 H2O

Checking the balanced equation: There are 5 carbon atoms, 12 hydrogen atoms, and 16 oxygen atoms on both sides of the equation, thus confirming the reaction is balanced.

Which best describes how the current scientific model of the atom was developed the model was the result of hundreds of years of experiments recent experiments in a valid in most of the book of last 200 years most of the discoveries from the early nineteen-hundreds was shown to be incorrect new experiments for ignored or they did not agree with the accepted Theory

Answers

Answer:

The model was the result of hundreds of years of experiments. however we have had modifications.

Explanation:

How is the rate of evaporation of a liquid affected by (a) temperature, (b) the surface area of liquid exposed to air, (c) intermolecular forces??

Answers

Final answer:

The rate of evaporation is higher with increased temperature, greater surface area, and weaker intermolecular forces; temperature rise decreases the surface tension of water.

Explanation:

The rate of evaporation of a liquid is influenced by several factors. Let us look at these factors one by one:

Temperature: As temperature increases, the average kinetic energy of the molecules also increases. This means more molecules have sufficient energy to overcome the intermolecular forces and escape into the gas phase, thus increasing the rate of evaporation.

Surface Area: The greater the surface area exposed to air, the more molecules are available to evaporate at any given time, leading to a higher rate of evaporation.

Intermolecular Forces: Stronger intermolecular forces make it more difficult for molecules to escape into the gas phase, resulting in lower rates of evaporation. Conversely, weaker intermolecular forces enhance the rate of evaporation.

If we specifically look at how temperature affects surface tension, we note that an increase in temperature will generally result in a decrease in the surface tension of water. This happens because as the temperature rises, the molecules have more kinetic energy, which disrupts the cohesive intermolecular forces between water molecules, thus decreasing surface tension.

How is a mixture different from a compound? 1. composition of a mixture may be constant. 2. components of a mixture can be separated by physical means. 3. components of a mixture can only be separated chemically. 4. particles of a mixture are combined chemically?

Answers

The correct answer is 2 hope this helps

Mixture is different from a compound because components of a mixture can be separated by physical means.

What is a compound?

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

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How is the volatility of a substance related to the intermolecular forces present within the substance? how is the volatility of a substance related to the intermolecular forces present within the substance? the weaker the intermolecular forces, the more likely it is that molecules are to evaporate at a given temperature, making the liquid more volatile. the volatility of a substance does not depend on the intermolecular forces present within the substance. the stronger the intermolecular forces, the more likely it is that molecules are to evaporate at a given temperature, making the liquid more volatile?

Answers

Weaker the intermolecular forces present the less the energy is required to break these forces and change its state from liquid to vapors/gas.
More stronger the intermolecular forces the less the volatile the substance be as the more energy or temperature is required to overcome these intermolecular forces

The less volatile a chemical is, the stronger the intermolecular interactions must be overcome before they can be overcome using energy or temperature.

What is intermolecular interaction ?

Intermolecular forces, such as the electromagnetic forces of attraction or repulsion that act between atoms and other kinds of nearby particles, such as atoms or ions, mediate interactions between molecules.

Intermolecular forces come in five flavors: ion-induced dipole forces, dipole-induced dipole forces, induced dipole forces, and dipole-dipole forces. Ions and polar (dipole) molecules are held together by ion-dipole forces.

Ionic bonds, hydrogen bonds, Van der Waals dipole-dipole interactions, and Van der Waals dispersion forces are the four main intermolecular force.

Thus, The weaker the intermolecular interactions, the less energy is needed to overcome them and convert the substance from liquid to vapor or gas.

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Determine the oxidation number of sulfur in NaHSO4.\

Answers

The oxidation number is VI

A compound analyzed as 18.0% carbon, 2.26% hydrogen, and 79.7% chlorine. calculate the empirical formula of the compound.

Answers

To answer this item, our basis is 100g. We solve for the masses of the given elements in this item,
 
            carbon:     (0.18)(100 g) = 18 g
            hydrogen:  (0.0226)(100 g) = 2.26 g
            chlorine:    (0.797)(100 g) = 17.7 g

Then, we calculate for the number of moles by dividing the masses by the molar masses of the given elements.

Number of moles:

              carbon = (18 g) x (1 mol / 12 g) = 1.5 moles
             hydrogen = (2.26 g) x (1 mol/ 1.01 g) = 2.23 moles
             chlorine = (79.7 g) x (1 mol / 35.45 g) = 2.25 moles

We get the ratio of the number of moles by dividing them with the lowest value, 1.5.
                      Carbon = 1.5 moles / 1.5 = 1
                      Hydrogen = 2.23 moles / 1.5 = 1.48
                      Chlorine = 2.25 / 1.5 = 1.5

The empirical formula is,
                     C1H1.5CL1.5
Simplifying,
                    C2H3Cl3

Final answer:

The empirical formula of a compound with 18.0% carbon, 2.26% hydrogen, and 79.7% chlorine can be calculated by converting the percentages to grams, assuming a 100 g sample, and then converting that to moles. The moles are then used to find the simplest whole number ratio, and after comparison and adjustment, we deduce an empirical formula of C₂H₃Cl₃.

Explanation:

To calculate the empirical formula of a compound with a given percent composition, we first convert the percentages to grams, assuming we have a 100 g sample. This means the compound contains 18.0 g of carbon (C), 2.26 g of hydrogen (H), and 79.7 g of chlorine (Cl). Next, we convert the mass of each element to moles by dividing by its atomic mass (C: approximately 12.01 g/mol, H: approximately 1.01 g/mol, Cl: approximately 35.45 g/mol).

Step-by-step:

Convert the mass of each element to moles:\nCarbon: 18.0 g ÷ 12.01 g/mol = 1.5 mol\nHydrogen: 2.26 g ÷ 1.01 g/mol = 2.24 mol\nChlorine: 79.7 g ÷ 35.45 g/mol = 2.25 molDetermine the simplest whole number ratio of the elements in moles. To do this, divide the number of moles of each element by the smallest number of moles from the three elements calculated:

As hydrogen and chlorine are in almost a 1:1 molar ratio and carbon seems to be in a 2:3 ratio with chlorine, the empirical formula appears to be C₂H₃Cl₃. It's important to note that slight variations in these calculations could change the final empirical formula. Thus, we must adjust our calculations accordingly to ensure the molar ratios reflect whole numbers. If necessary, we multiply each of the mole ratios by the smallest common factor to obtain whole numbers.

Fungal laccase, a blue protein found in wood-rotting fungi, is 0.390% cu by mass. if a fungal laccase molecule contains four copper atoms, what is the molar mass of fungal laccase?

Answers

molar mass of copper is 63.546

so malar mass of the laccase is

4* 63.546
-------------- = 651.754
0.39

Answer:

65,179.487 g/mol is the molar mass of fungal laccase.

Explanation:

Percentage of copper in Fungal laccase = 0.390

Molar mass of fungal laccase = M

Number of copper atom in 1 fungal laccase molecule = 4

Atomic mass of copper = 63.55 g/mol

Percentage of an element in a compound:

[tex]\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of compound}}\times 100[/tex]

Percentage of copper:

[tex]\frac{4\times 63.55 g/mol}{M}\times 100=0.390\%[/tex]

[tex]M=\frac{4\times 63.55 g/mol}{0.390}\times 100[/tex]

M = 65,179.487 g/mol

65,179.487 g/mol is the molar mass of fungal laccase.

One tablespoon of peanut butter has a mass of 17.0 g. it is combusted in a calorimeter whose heat capacity is 110 kj/°c. the temperature of the calorimeter rises from 21.2 âc to 24.4 âc . what is the caloric content of peanut butter in cal/g?

Answers

If the calorimeter whose heat capacity is 110 kJ/°C rises its temperature from 21.2°C to 24.4°C, the heat transmited to it is: 110 kJ/°C * (24.4°C - 21.2°C) = 110kJ/°C (3.2°C) = 352 kJ.

That heat is generated by the combustion of 17.0 g of peanut butter, so the caloric content of it is: 352kJ / 17.0 g = 20.705 kJ/g.

Now use the conversion from kJ to cal:

1 cal = 4.184 J

=> 20.705kJ/g * 1000 J/kJ * 1cal/4.184J = 4948.6 cal/g

Answer: 4948.6 cal/g
Final answer:

The caloric content of peanut butter is approximately 1,347 cal/g.

Explanation:

To find the caloric content of peanut butter in cal/g, we need to calculate the amount of heat transferred from the combustion of the peanut butter. We can use the formula:

q = mcΔT

Where q is the heat transferred, m is the mass of the peanut butter, c is the heat capacity of the calorimeter, and ΔT is the change in temperature.

Using the given values:

Mass of peanut butter (m)= 17.0 g Heat capacity of calorimeter (c) = 110 kJ/°C Change in temperature (ΔT) = 24.4 °C - 21.2 °C = 3.2 °C

Substituting these values into the formula:

q = (17.0 g)(110 kJ/°C)(3.2 °C)

q ≈ 5,632 J

To convert joules to calories, we divide by 4.184 (1 cal = 4.184 J):

5,632 J ÷ 4.184 cal/J ≈ 1,347 cal

Therefore, the caloric content of peanut butter is approximately 1,347 cal/g.

How many carbon atoms are in the fragment that is fed into the citric acid cycle to bind with oxaloacetate and what is this molecule called?

Answers

I believe that there are 2 carbon atoms in the intermediate molecule known as acetyl coenzyme A. Which is fed into the citric acid cycle to bind with oxaloacetate.

Constance is making a vegetable soup that contains carrots, beans, water, salt, pepper, bits of ham, and onions. the soup has to cook for 4 hours. while the soup is cooking, what will happen to some of the minerals that are in its ingredients?

Answers

During the cooking process and due to the presence of heat, some of the minerals from the ingredients as well as part of the fluid found within the ingredients will just leak out of the ingredients into the soup and become part of the soup itself.
Final answer:

Cooking can alter the structure of proteins and destroy certain vitamins in the soup ingredients, while salt acts as a preservative to prevent bacterial growth.

Explanation:

When the soup is cooking, some of the minerals in its ingredients may undergo changes. For example, cooking can alter the structure of proteins in the ham and vegetables, making them easier to digest. However, cooking can also destroy certain vitamins, such as vitamins B and C in vegetables. Additionally, salt, which is a mineral, is used as a preservative in the soup, preventing the growth of bacteria by dehydrating them through osmotic pressure.

Titration experiments require the use of a...
Watch glass
Burette
Crucible
Bunsen burner

Answers

Titration experiments require the use of a burette. It is a long graduated glass tube held in place by a clamp stand. It has a tap fixture on the end that regulates the delivery of small volumes of liquid into a beaker in the titration process. Bunsen burners are used to heat substances and crucibles are used to hold items to be heated to high temperatures. 

What would be the formula of the precipitate that forms when pb(no3)2 (aq) and k2so4 (aq) are mixed?

Answers

The formula of the ppt. formed is PbSo4 , which is inslouble.

What is the concentration of hydroxide ions in a solution with a pH of 5.24?
5.75 × 10-6
1.74 × 10-9
1.55 × 10-7
4.54 × 10-4

Answers

pOH=-lg[OH⁻]

pOH=14-pH

-lg[OH⁻]=14-pH

[OH⁻]=10^(pH-14)

[OH⁻]=10^(5.24-14)=1.7378×10⁻⁹ ≈1.74×10⁻⁹ mol/L

Answer:

The concentration of hydroxide ions in a solution with a pH of 5.24 is [tex]1.74\times 10^{-9} M[/tex].

Explanation:

The pH of the solution is defined as negative logarithm of [tex]H^+[/tex] ions in solution.

[tex]pH=-\log[H^+][/tex]

The pH of the solution = 5.24

Sum of pH and pOH is equal to 14.

[tex]pH+pOH=14[/tex]

[tex]pOH=14-pH=14-5.24=8.76[/tex]

[tex]pOH=-\log[OH^-][/tex]

[tex]8,76=\log[OH^-][/tex]

[tex][OH^-]=1.7378\times 10^{-9}\approx=1.74\times 10^{-9} M[/tex]

The concentration of hydroxide ions in a solution with a pH of 5.24 is [tex]1.74\times 10^{-9} M[/tex].

Devise a way to separate a mixture of sand, salt, and iron filings. Write the procedure using a step-by-step method and explain the reasoning behind each step. CAN SOMEONE PLEASE HELP ME??????!!!!!!!!!

Answers

1. Iron fillings are magnetic, so use a magnet to pull the iron fillings out of the mix.
2. Then you can put the salt and sand mixture into water, since salt is soluble, and the salt will dissolve, leaving you with sand.
Final answer:

Separate a mixture of sand, salt, and iron filings by first using a magnet to remove the iron filings. Then, add water to dissolve the salt, and decant the salty water, leaving the sand behind. Finally, allow the water to evaporate to retrieve the salt.

Explanation:

To separate a mixture of sand, salt, and iron filings, you would first use a magnet to remove the iron filings from the mixture. This is possible because iron is a magnetic material and will be attracted to the magnet, which allows it to be separated from the non-magnetic substances (sand and salt).

Run a magnet over the mixture. Hold the magnet close but not directly in the substance, to attract only the iron filings.Next, to separate the sand and salt, add water to the mixture. Salt is soluble in water, which means it will dissolve in the water, but the sand will not.Stir the mixture to allow the salt to dissolve completely. Allow it to sit for a period to let the sand settle at the bottom.Then, decant (pour off) the salty water into another container, being careful to leave the sand behind.Finally, to retrieve the salt from the water, you can simply allow the water to evaporate, leaving the salt behind.

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How many protons are there in 20.02 mol of neon (ne)?

Answers

Answer: There are 1.216×10^26 protons in 20.02mole of neon

Explanation:

Using Avogadro's number

1 mole of neon contains 6.023×10^23 neon atoms.

I atm contains 10 protons

Number of protons = (6.023×10^23)×20.02×10= 1.216×10^26

Nickel and gold combine to make white gold. White gold is considered a(n) of nickel and gold.

Answers

i think metal combinations are called alloy
White gold is considered an alloy of nickel and gold.
Alloy is the term which refers to the combination of metals, in which a new type of a metal is created. When you mix gold and some other white metal (such as nickel, palladium, or manganese), you get an alloy known as white gold. 

The oxidation numbers of nitrogen in nh3, hno3, and no2 are, respectively:

Answers

The oxidation numbers for Nitrogen are respectively -3, +5, +4

Answer:

The oxidation number are

NH₃: -3

HNO₃ : +5

NO₂ : +4

Explanation:

The oxidation number is calculated considering that

a) oxidation number of hydrogen is +1 in all compounds except hydrides

b) oxidation number of oxygen is -2 in all compound except peroxides, superoxides and compound of fluorine.

a) NH₃ : let the oxidation number of nitrogen is "x"

x + 3 (+1) = 0

Therefore x = -3

b) HNO₃

Let the oxidation number of nitrogen is "x"

+1 + x +3(-2) = 0

x = -5.

c) NO₂

Let oxidation number of nitrogen ix "x"

x + 2(-2)= 0

x = +4

Based on its location on the periodic table, which element would be most likely to form a negative ion?

A. Aluminum (Al)
B. Copper (Cu)
C. Sodium (Na)
D. Fluorine (F)

Answers

Fluorine ONLY form\s an ion with a -1 charge. The other three are metals, and metals for positively charged ions.

Answer: The element which is most likely to form negative ion is fluorine.

Explanation:

An ion is formed when a neutral atom looses or gains electrons.

When an atom looses electrons, it results in the formation of positive ion known as cation.When an atom gains electrons, it results in the formation of negative ion known as anion.

For the given options:

Option A: Aluminium

Aluminium is the 13th element of the periodic table having electronic configuration of [tex]1s^22s^22p^63s^23p^1[/tex]

This element will loose 3 electrons to attain stable electronic configuration and will form [tex]Al^{3+}[/tex] ion

Option B: Copper

Copper is the 29th element of the periodic table having electronic configuration of [tex]1s^22s^22p^63s^23p^64s^23d^9[/tex]

This element will loose 2 electrons to attain stable electronic configuration and will form [tex]Cu^{2+}[/tex] ion

Option C: Sodium

Sodium is the 11th element of the periodic table having electronic configuration of [tex]1s^22s^22p^63s^1[/tex]

This element will loose 1 electron to attain stable electronic configuration and will form [tex]Na^{+}[/tex] ion

Option D: Fluorine

Fluorine is the 9th element of the periodic table having electronic configuration of [tex]1s^22s^22p^5[/tex]

This element will gain 1 electron to attain stable electronic configuration and will form [tex]F^{-}[/tex] ion

Hence, the element which is most likely to form negative ion is fluorine.

Baking soda (nahco3) decomposes when it is heated according to the equation below. how many kilojoules of heat are required to decompose 1.96 mol nahco3(s)

Answers

Final Answer:

To decompose 1.96 mol of NaHCO₃ (s), 199.2 kJ of heat is required.

Explanation:

When baking soda (NaHCO₃) decomposes upon heating, it undergoes a chemical reaction, producing sodium carbonate (Na₂CO₃), water vapor (H₂O), and carbon dioxide gas (CO₂). The balanced equation for this reaction is:

NaHCO₃ (s) [tex]\rightarrow \text[/tex] {Na₂CO₃ (s) + H₂O (g) + CO₂ (g)

To determine the heat required to decompose a given amount of (NaHCO₃), we can use the stoichiometry of the reaction. The coefficient in front of (NaHCO₃) in the balanced equation is 2, indicating that 2 moles of (NaHCO₃) produce the products mentioned in the reaction.

Given that we have 1.96 mol of (NaHCO₃), we can set up a proportion to find the heat required:

[tex]\[\frac{\text{moles of } NaHCO₃}{\text{coefficient of } NaHCO₃} = \frac{\text{heat required}}{\text{coefficient of } Na₂CO₃}\][/tex]

[tex]\[ \frac{1.96}{2} = \frac{\text{heat required}}{1} \][/tex]

Solving for the heat required:

[tex]\[ \text{heat required} = 1.96 \times \frac{1}{2} \times \text{heat of the reaction} \][/tex]

The heat of the reaction can be obtained from thermochemical tables or databases. For the given reaction, it is typically around 199.2 kJ. Therefore, the heat required to decompose 1.96 mol of (NaHCO₃) is [tex]\(1.96 \times \frac{1}{2} \times 199.2 = 99.6\) kJ.[/tex]

In conclusion, 99.6 kJ of heat is needed to decompose 1.96 mol of (NaHCO₃) based on the provided chemical reaction.

Complete Question:

Baking soda (NaHCO₃) decomposes when it is heated according to the equation below:

[tex]\[2 \text{NaHCO}_3 (s) \rightarrow \text{Na}_2\text{CO}_3 (s) + \text{H}_2\text{O} (g) + \text{CO}_2 (g)\][/tex]

How many kilojoules of heat are required to decompose 1.96 mol of NaHCO₃ (s)?

An ore contains fe3o4 and no other iron. the iron in a 36.6-gram sample of the ore is all converted by a series of chemical reactions to fe2o3. the mass of fe2o3 is measured to be 29 g. what was the mass of fe3o4 in the sample of ore?

Answers

To solve this problem, let us first find for the molar mass of Fe2O3 and Fe3O4.

Fe = 55.85 g/mol and O = 16 g/mol

Therefore,

Fe2O3 = 159.7 g/mol

Fe3O4 = 231.55 g/mol

 

We are given that there are 29 g of Fe2O3, we calculate for the amount of Fe from this in moles:

mol Fe = 29 g Fe2O3 (1 / 159.7 g/mol) (2 mol Fe / 1 mol Fe2O3)

mol Fe = 0.363 mol

 

Converting this to Fe3O4:

mass Fe3O4 = 0.363 mol Fe (1 mol Fe3O4 / 3 mol Fe) (231.55 g/mol)

mass Fe3O4 = 28.03 g


Therefore there are 28.03g of Fe3O4 in the ore.

If heat energy is absorbed by the system during a chemical reaction, the reaction is said to be

Answers

the reaction is said to be Endothermic.

A sample of gas has a pressure of 3.00 atm at 25 degrees Celsius. What would the pressure be at 52 degrees Celsius if the volume stays constant? Which gas law does this problem represent?

Answers

The law that relate pressure and temperature of gases at constant volumes is Gay-Lussac's Law.

It states that the pressure of a fixed mass of gas is directly proportional to the absolute temperature when the volume is constant.

 P / T = constant => P1 / T1 = P2 / T2

=> P2 = T2 * P1 / T1

Remember that the formula uses absolute temperatures.

T2 = 52 + 273.15 = 325.15 K

T1 = 25 + 273.15 = 298.15 K

=> P2 = 325.15K * 3.00 atm / 298.15K = 3.27 atm.

Answer: 3.27 atm

The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function p = 120i i2 + i + 9 where i is the light intensity (measured in thousands of foot-candles). for what light intensity is p a maximum?

Answers

The given function is:

P = 120 i / (i^2 + i + 9)

or

P = 120 i (i^2 + i + 9)^-1

The maxima point is obtained by taking the 1st derivative of the function then equating dP / di = 0:

dP / di = 120 (i^2 + i + 9)^-1 + (-1) 120 i (i^2 + i + 9)^-2 (2i + 1)

setting dP / di =0 and multiplying whole equation by (i^2 + i + 9)^2:

0 = 120 (i^2 + i + 9) – 120i (2i + 1)

Dividing further by 120 will yield:

i^2 + i + 9 – 2i^2 – i = 0

-i^2 + 9 =0

i^2 = 9

i = 3      (ANSWER)

Therefore P is a maximum when i = 3

Checking:

P = 120 * 3 / (3^2 + 3 + 9)

P = 17.14

Final answer:

To find the light intensity at which photosynthesis rate for a given phytoplankton species is maximal, you must differentiate the function expressing photosynthesis rate in terms of light intensity, set the derivative equal to zero, and solve for i. This equation's solutions are the critical points where the rate of photosynthesis may reach a maximum.

Explanation:

The question asks when photosynthesis rate (in mg carbon/m3/h) for a certain species of phytoplankton is maximal, given the function p = 120i / (i2 + i + 9) where i stands for light intensity (in 1000s of foot-candles).

To find the maximum value for any given function, you must find the derivative of that function (also referred to as the rate of change) and set it to equal zero. This can be performed using calculus, specifically the application of differentiation rules. Since the given function is a complex fraction, it's necessary to apply the Quotient Rule of differentiation, which states that the derivative of the quotient of two functions is the denominator times the derivative of the numerator minus the numerator times the derivative of the denominator all over the square of the denominator.

Once you have found the derivative, you find its roots by solving for i when the derivative equals zero. These i values provide the inflection points of the initial function which correspond to either the maximum or minimum values of p (these can be distinguished by checking a value to the left and right of each root), or where the function has a horizontal tangent.

In this way, the intensity of light at which photosynthesis rate for the phytoplankton is maximal can be derived.

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What is/are the product(s) of a neutralization reaction of a carboxylic acid?

Answers

RCOOH + NaOH → RCOONa + H₂O   (salt and water)

RCOOH + OH⁻ → RCOO⁻ + H₂O

The products of neutralization reaction of carboxylic acid are salt of weak acid and water.

What are neutralization reactions?

Neutralization reactions are chemical reactions wherein acid and a base react to form salt and water as the products.In these reactions, the H[tex]^+[/tex] and OH[tex]^-[/tex] ions combine to give water.

Neutralization reactions wherein strong acid and strong base are involved the pH of solutions is 7.The neutralization reaction of strong acid and weak base result in solution with pH less than 7 and pH  is greater 7 when neutralization takes place between strong base and weak acid.

Salts formed from neutralized solution has equal weight of acid and base.Most commonly used application  of neutralization reactions is titrations. Neutralization reactions are a type of double displacement reactions.These reactions are important because it affects behavior of solution and it's interaction with other substances.

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