Answer: The correct statements are the concentration of one or more of the products is small, the reaction will not proceed very far to the right and the reaction will generally form more reactants than products.
Explanation:
[tex]K_{eq}[/tex] is defined as the equilibrium constant of the reaction. It is basically the ratio of concentration of products to the concentration of reactants, each raised to the power their stoichiometric coefficients.
For a reaction:
[tex]aA+bB\rightarrow cC+dD[/tex]
The expression for [tex]K_{eq}[/tex] is:
[tex]K_{eq}=\frac{[C]^c[D]^d}{[A]^a[B]^b}[/tex]
When [tex]K>1[/tex], forward reaction is favored and when [tex]K<1[/tex], backward reaction is favored.
When K < 1, the expected possibilities are:
The reaction will proceed in the left directionThe reaction will lead to the formation of reactants more than the products.The concentration of reactants is more than the concentration of products.Hence, the correct statements are the concentration of one or more of the products is small, the reaction will not proceed very far to the right and the reaction will generally form more reactants than products.
1.64 mol of nickel at 150.13ºC is placed in 1.00 L of water at 25.09ºC. The final temperature of the nickel-water mixture is 26.34ºC. What is the specific heat of nickel?
a. 0.439 J K-1 mol-1
b. 0.554 J K-1 mol-1
c. 2.28 J K-1 mol-1
d. 25.7 J K-1 mol-1
e. 31.6 J K-1 mol-1
what are 2 key characteristics of a good scientific investigation
Methanol is an important solvent. it is also an important starting material for the synthesis of other molecules. most methanol today is obtained from the
If you have a solid like ice (solid water), which of the following substances below would most closely resemble the structure of ice? indium cadmium quartz topaz
Aqueous acetic acid is neutralized by aqueous barium hydroxide. express your answer as a balanced molecular equation. identify all of the phases in your answer.
The balanced molecular equation for the given reaction is:
[tex]2CH_3COOH(aq) \ + \ Ba(OH)_2(aq) \rightarrow \ Ba(CH_3COO)_2(aq) + 2H_2O(l).[/tex]
FURTHER EXPLANATIONTo check that the equation is balanced count how many atoms are present for each element in the reactant and product side. If they are the same before and after reaction for all elements, then the reaction is deemed balanced.
The atom counting for the equation is shown below:
[tex]2CH_3COOH(aq) \ + \ Ba(OH)_2(aq) \rightarrow \ Ba(CH_3COO)_2(aq) + 2H_2O(l).[/tex]
Reactants → Products
C: (2 x 2) =4 C: (2 x 2) = 4
H: (2 x 4) + (1 x 2) =10 H: (3 x 2) + (2 X 2) = 10
O: (2 x 2) + (1 x 2) = 6 O: (2 x 2) + (2 x 1) = 6
Ba: 1 Ba: 1
Since the number of atoms of each element are similar in the reactants and products, the equation is balanced.
To determine the state of the substances, consider their solubility.
The reactants are both aqueous (aq) as indicated in the problem.
The first product, [tex]Ba(CH_3COO)_2[/tex] is aqueous (aq) because based on the solubility rule, it will dissolve in water. Acetates are generally soluble.
The other product is water which will be liquid (l) since it is the solvent used to dissolve the substances.
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The balanced molecular equation for reaction of acetic acid and barium hydroxide is as follows:
[tex]\boxed{2\text{CH}_3\text{COOH}(aq)+\text{Ba(OH)}_2(aq)\rightarrow\left(\text{CH}_3\text{COO}\right)_2\text{Ba} (aq)+2\text{H}_2\text{O}(l)}[/tex]
Further Explanation:
Neutralization reaction:
This reaction occurs when acid and base react with each other and salt and water are formed. Since these reactions neutralize excess amount of hydrogen or hydroxide ions in the solution, it is named so.
Acetic acid is weak acid and barium hydroxide is strong base. Both react with each other to form salt and water and neutralization reaction takes place.
Chemical equations are written in following different types of equations:
Molecular equations Total ionic equations Net ionic equationsIn molecular equations, reactants and products are present in undissociated form. Total ionic equations involve all different types of ions involved in the reactions. But in net ionic equations, only useful ions are written.
In this reaction, [tex]\text{CH}_3\text{COOH}[/tex], reacts with [tex]\text{Ba(OH)}_2[/tex] to form [tex]\left(\text{CH}_3\text{COO}\right)_2\text{Ba}[/tex] and [tex]\text{H}_2\text{O}[/tex]. Here, [tex]\text{CH}_3\text{COOH}[/tex], [tex]\text{Ba(OH)}_2[/tex] and [tex]\left(\text{CH}_3\text{COO}\right)_2\text{Ba}[/tex] are present in aqueous phase while [tex]\text{H}_2\text{O}[/tex] is present in liquid phase. Unbalanced molecular equation becomes,
[tex]\text{CH}_3\text{COOH}(aq)+\text{Ba(OH)}_2(aq)\rightarrow\left(\text{CH}_3\text{COO}\right)_2\text{Ba} (aq)+\text{H}_2\text{O}(l)[/tex]
Number of atoms of all elements on both sides of reaction is written.
On reactant side,
Number of C atom is 1.
Number of H atoms is 6.
Number of Ba atoms is 1.
Number of O atoms is 4.
On the product side,
Number of C atom is 2.
Number of H atoms is 8.
Number of Ba atoms is 1.
Number of O atoms is 5.
Initially, atoms other than carbon, oxygen, and hydrogen are balanced by multiplying with some number on any side. Ba atoms are balanced on both sides. So carbon, hydrogen and oxygen atoms are balanced now. For this, [tex]\text{CH}_3\text{COOH}[/tex] is multiplied by 2 and [tex]\text{H}_2\text{O}[/tex] by 2. Now the balanced equation is as follows:
[tex]2\text{CH}_3\text{COOH}(aq)+\text{Ba(OH)}_2(aq)\rightarrow\left(\text{CH}_3\text{COO}\right)_2\text{Ba} (aq)+2\text{H}_2\text{O}(l)[/tex]
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Answer details:
Grade: High School
Subject: Chemistry
Chapter: Chemical reactions and equations
Keywords: chemical reactions, reactants, products, molecular equations, net ionic equation, CH3COOH, H2O, Ba(OH)2, (CH3COO)2Ba, Ba, O, H, C.
If nickel is added to copper sulfate solution, the nickel will replace the copper. write the balanced equation
Answer:-
Ni + CuSO4 --> NiSO4 + Cu
Explanation:-
The symbol for Nickel is Ni.
The Symbol for copper is Cu.
Copper Sulphate has the formula CuSO4.
If Nickel replaces copper from copper sulphate then nickel sulphate is formed.
Nickel sulphate has the formula NiSO4.
So the equation becomes
Ni + CuSO4 --> NiSO4 + Cu
What statement correctly describes the key features of the graph of f(x) = 4(1/2)^(x + 1 )− 3
Y-intercept of (0, −1), starts up on the left, gets closer to y = −3 on the right
Y-intercept of (0, −1), starts down on the left, gets closer to y = −3 on the right
Y-intercept of (0, 1), starts up on the left, gets closer to y = −3 on the right
Y-intercept of (0, 1), starts down on the left, gets closer to y = −3 on the right
Answer:
The correct option is:
"Y-intercept of (0, −1), starts down on the left, gets closer to y = −3 on the right"
Explanation:
You have the following function:
[tex]f(x)=y=4*(\frac{1}{2}) ^{x+1} -3[/tex]
The intersection on the "y" axis implies that the value at "x" must be zero. So, to calculate the value in "y" you must replace "x" with the value 0 and perform the corresponding calculations:
[tex]y=4*(\frac{1}{2}) ^{0+1} -3[/tex]
[tex]y=4*(\frac{1}{2}) -3[/tex]
[tex]y=2 -3[/tex]
[tex]y=-1[/tex]
Being (x, y) a point on the graph, the y- intercept is (0,-1).
This function is an exponential function function, whose form corresponds to the general expression:
[tex]g(x)=k*a^{x-h} +b[/tex]
Where:
If a is greater than 1 (a> 1), the function is increasing. On the other hand, if a is less than 1 (a <1), the function is decreasing. b is the independent term of the equation and determines the Horizontal Asymptote, which is a horizontal line to which the function is approaching indefinitely. In this case it is the value -3.The graph of the function is shown in the attached image.
The correct option is:
"Y-intercept of (0, −1), starts down on the left, gets closer to y = −3 on the right"
He approximate molar concentration of several chemicals are given. find the ph of each. use the calculator and round to the nearest tenth, if necessary. oven cleaner: [h+] = 10−13 ph = water: [h+] = 0.0000007 ph = blood: [h+] = 0.00000004 ph = vinegar: [h+] = 0.0063 ph =
Answer:
oven cleaner: ph=13
water: ph=6.2
blood: ph=7.4
vinegar ph=2.2
Explanation:
got it right on ed
The pH values for the given solutions are calculated using the formula pH = -log[H+], where [H+] is the concentration of hydrogen ions. The pH values for an oven cleaner, water, blood, and vinegar are found to be 13.0, 7.2, 7.4, and 2.2 respectively.
Explanation:To calculate the pH of a solution, we use the formula pH = -log[H+]. Here [H+] represents the molar concentration of hydrogen ions in moles per liter (M).
Oven cleaner: With [H+] = 10-13 M, we find pH as follows:
pH = -log(10-13) = 13.0
Water: For [H+] = 0.0000007 M or 7×10-7M:
pH = -log(7×10-7) = 7.2
Blood: Given [H+] = 0.00000004 M or 4×10-8M:
pH = -log(4×10-8) = 7.4
Vinegar: With [H+] = 0.0063 M:
pH = -log(0.0063) = 2.2
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How many moles of electrons are required to reduce one mole of nitrogen gas (N2) to two moles of nitrogen ions (N3-)?
True or False no two elements have the same atomic number.
How many electrons are transferred in the ionic bond between sodium and chlorine in nacl?
Answer:
1
Explanation:
Just got it right on the quiz.
That is the exchange to fill.
Hope this helps.
Carbon monoxide poisoning is sometimes mistakenly identified as what?
When we breathe red blood cells bond to the oxygen but when we inhale carbon monoxide (CO), it sticks to red blood cells and block the oxygen and suffocation occurs. It is also known as “Silent Killer”.
Headaches, nausea and fatigue are some of early symptoms of carbon monoxide poisoning. It is sometimes mistakenly identified as “Flu”. Because this gas cannot be detected at home. It is produced by common household appliances, if not proper ventilated, such as water heaters, generators, cars etc.
Carbon monoxide poisoning and acute toxicity are related and often confused due to similar symptoms such as headache, weakness, and even death.
Carbon monoxide poisoning occurs due to inhaling excessive levels of carbon monoxide (CO), which can lead to symptoms like headache, dizziness, weakness, and even death. This poisoning is sometimes mistakenly identified as acute toxicity due to exposure to carbon monoxide.
Loss of consciousness, arrhythmias, seizures, and even death can result from large CO exposures.Long-term complications may include chronic fatigue, memory issues, and movement problems.the basic organizational feature of the periodic table of elements
Brainliest if answered in the next 5m
A weak acid, like Hydrofluoric acid, can be dangerous if _____. Select all that apply.
concentrated
used without adult supervision
used without goggles
used without gloves
tasted
Can just one measurement be considered precise? Can just one measurement be considered accurate?
Final answer:
A single measurement cannot be considered precise as precision requires consistency across multiple measurements. However, a single measurement can be considered accurate if it closely matches the true or accepted value. Accuracy and precision are critical in scientific measurements for validity.
Explanation:
The concepts of accuracy and precision are fundamental in scientific measurements. When it comes to a single measurement being considered precise or accurate, context is essential. Precision refers to the consistency of repeated measurements. Therefore, one isolated measurement cannot be labeled as 'precise' without additional data to compare it to. However, a single measurement can be considered accurate if it is very close to the true or accepted value. For instance, if you measure a piece of standard computer paper and it states that it is 11.0 inches long, if you measure it once and obtain 11.1 inches, that single measurement can be considered quite accurate, assuming the stated length is correct.
Nevertheless, precision is really about the reproducibility of multiple measurements, and accuracy concerns how close a measurement is to the true or accepted reference value. For instance, if you have a series of measurements showing 11.1 in., 11.2 in., and 10.9 in., these could be considered both accurate and precise, as they are close to the true value of 11.0 inches and to each other. Conversely, a single measurement of 12 inches would be neither accurate (not close to 11.0 inches) nor precise if the rest of the measurements are significantly different from 12 inches.
Calcium fluoride (CaF2) has a solubility constant of 3.45 x 10-11
. What is the molar solubility of CaF2 in water?
4.15 x 10-6 M
5.87 x 10-6 M
2.05 x 10-4 M
3.26 x 10-4 M
According to the collision theory what two factors must be true to successfully result in a reaction
Explanation:
According to collision theory, more is the number of collisions between the particles of reactants more will be the rate of a reaction.
Two important factors of collision theory are as follows.
Sufficient energyOrientationSufficient energy: Molecules participating in a chemical reaction should have sufficient amount of energy so that they can overcome activation energy barrier and participate effectively in the reaction.
Orientation: Collision between the molecules should take place with proper orientation so that they successfully result in the formation of products.
According to the collision theory, the two factors that must be true for a reaction to occur are sufficient energy and proper orientation of reactant particles.
What is the collision theory of reactions?The collision theory states that a reactant molecules must collide effectively with energy greater than or equals to activation energy for products to be formed.
According to the collision theory, the two factors that must be true are:
reactant molecules must be oriented properly the reactant molecules must have sufficient energyTherefore, sufficient energy and proper orientation of particles is necessary for product formation.
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Which type of storage facility is assumed to be safe for long term storage of nuclear waste products
Answer:
Deep geological disposal method
Explanation:
A deep geological disposal method is the most efficient method in disposing of the waste materials produced from a nuclear plant. These materials are disposed at a depth of usually about 200 to 1000 m below the surface and also from 1500 m to 5500 m below the surface. And it has to be below the groundwater level so that it does not contaminate it. So necessary precautionary measures are needed to be taken.
This method is used for the disposal of high and intermediate levels of nuclear waste often represented by HLW and ILW respectively.
What substance is added to an organic molecule to test for the degree of saturation? bromine hydrogen gas water hydrogen bromide?
Final answer:
Bromine is added to an organic molecule to test for saturation; it reacts with unsaturated compounds causing a color change, while the color remains the same in the presence of saturated compounds.
Explanation:
The substance added to an organic molecule to test for the degree of saturation is bromine. This test is based on bromine's distinctive brownish-orange color, which fades upon reaction with unsaturated compounds. In the reaction, bromine is added to the double or triple bonds present in unsaturated hydrocarbons, causing a decolorization as it forms a dibromo compound. On the other hand, if the organic molecule is saturated, the bromine retains its color as there are no double or triple bonds for the bromine to react with.
On a molecular level, the reaction demonstrates the difference between saturated and unsaturated hydrocarbons. Saturated hydrocarbons, such as alkanes, have a C-H bond that can potentially react with bromine, whereas unsaturated hydrocarbons like alkenes and alkynes have double or triple bonds that readily react with bromine, respectively. This chemical behavior is part of the microscopic domain that helps distinguish structural differences in organic compounds.
identify solute and solvent in 80 solution of ethyl alcohol with water
Calculate the percent ionic character of a chemical bond between beryllium and fluorine
The percent ionic character of a chemical bond, such as between beryllium and fluorine, can be determined using the difference in electronegativity between the two elements based on Pauling's scale. Most bonds exhibit partial ionic character, as they fall within the spectrum between purely ionic and purely covalent.
Explanation:The percent ionic character of a chemical bond refers to the degree to which the bond exhibits ionic properties. In an ideal ionic bond, electrons are completely transferred from one atom to another. However, in reality, most bonds fall within the spectrum between purely ionic and purely covalent, exhibiting partial ionic character.
In the case of the bond between beryllium and fluorine, you can determine the percent ionic character by making use of Pauling's electronegativity values. First, you would calculate the difference in electronegativity between the two elements. Then, you use this difference to estimate the percent ionic character based on Pauling's scale.
For example, consider the hypothetical molecule HCl mentioned in the reference. Supposed that HCl was completely ionic, its molecular dipole moment was calculated to be 6.09 D. The experimentally measured bond moment, however, turned out to be 1.03 D. The percent ionic character was hence calculated as the bond moment divided by the theoretical fully ionic bond moment, multiplied by 100%. The result was 17%.
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What happens to the atomic mass of the elements moving from left to right within a period?
As you move across a period, the atomic mass increases because the atomic number also increases. ... The atomic mass for any given atom mainly comes from the mass of the protons and neutrons.
Moving from left to right across a period on the periodic table, the atomic mass of the elements generally increases. This is due to an increase in the number of protons and neutrons in the nucleus. For instance, in the second period, the atomic mass of Lithium is less than that of Neon.
Explanation:As you move from left to right across a period on the periodic table, there is an increase in the atomic mass of the elements. This happens because the number of protons, which contribute to the atomic mass, in the nucleus of an atom increases. The atomic mass is approximated by the mass number, which is the sum of the number of protons and neutrons in an atom's nucleus. Therefore, as the number of protons (and usually neutrons) increases, the atomic mass of the elements also generally increases.
For example, in the second period, the atomic mass of Lithium (Li) is about 7 amu, while the atomic mass of Neon (Ne), at the end of the same period, is about 20 amu.
Thus, when moving from left to right within a period of the periodic table, the atomic mass generally increases due to an increase in the number of protons and neutrons in the nucleus.
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What net ionic equation can be derived from this complete ionic equation? 2fe3+(aq) + 6cl– (aq) + 6na+(aq) + 3co32– (aq) → fe2(co3)3(s) + 6cl– (aq) + 6na+(aq)?
Why does a compound have characteristic properties?
Answer: Because of the arrangement of atoms in a compound.
Explanation:
A compound is defined as the chemical specie which is formed by the combination of two or more different type of atoms. For Example: [tex]H_2O,O_2[/tex] etc...
A compound has different physical and chemical properties than corresponding elements because of change in identity. For Example: Hydrogen and oxygen are gases, but the compound formed by the combination of these two that is water is liquid.
In a chemical compound, elements are combined in a fixed ratio of their masses.
Hence, a compound has characteristic property because of the arrangement of atoms in a compound
In which situation can a mixture always be called a solution?
calcium, magnesium, and phosphorus are all examples of
Explain how scientific observations led to the development of, and changes to, the periodic table.
substance which allows energy to pass through it
In the sun, two hydrogen nuclides react together to make an atom of helium. the process releases energy. which type of reaction is this
Answer:
Fusion.
Explanation:
The core squeezes together so tightly that four hydrogen nuclei combine to form one helium atom. This is the textbook definition of nuclear fusion.
Calculate the molar enthalpy change of H2O (l) when liquid water is heated from 41.7 C to 76.2 C
Final answer:
The molar enthalpy change of H2O (l) when liquid water is heated from 41.7 C to 76.2 C can be calculated using the formula: Q = mcΔT
Explanation:
The molar enthalpy change of H2O (l) when liquid water is heated from 41.7 C to 76.2 C can be calculated using the formula:
Q = mcΔT
Where,
Q is the heat energy changem is the mass of waterc is the specific heat capacity of water (4.184 J/g°C)ΔT is the change in temperature (76.2 C - 41.7 C)From the given equation, we can calculate the molar enthalpy change when 1 mole of water is heated using the molar mass of water (18.015 g/mol).
Using the formula:
ΔH = Q / n
Where,
ΔH is the molar enthalpy changeQ is the heat energy change (calculated earlier)n is the number of moles of waterWe can substitute the values into the formula and calculate the molar enthalpy change.