the niche of an organism is largely based on the evolution of an organism's physiology, behavior, and morphology
2. Calculate the molarity of 500.0 grams of Li2S in a total volume of 4.44 liters?
[Li2S molar mass = 46.0 grams/mol
Answer:
2.448 M ≅ 2.45 M.
Explanation:
Molarity (M) is the no. of moles of solute that dissolved in 1.0 L of the solution.
M = (no. of moles of solute)/(V of the solution (L).
M = (mass/molar mass) Li₂S / (V of the solution (L))
∴ M of Li₂S = (500.0 g/46.4 g/mol)/(4.44 L) = 2.448 M ≅ 2.45 M.
Answer:
The molarity of 500.0 grams of Li₂S in a total volume of 4.44 liters is 2.448 [tex]\frac{moles}{liter}[/tex]
Explanation:
Molarity (M) is the number of moles of solute (substance that dissolves in a solvent with which it forms a solution, is in a smaller proportion) that are dissolved in a given volume.
Molarity is expressed by the following expression:
[tex]M=\frac{number of moles of solute}{ volume of solution}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex]
Then, you must first know the amount of moles that represent the 500 g of Li₂S. For that, a rule of three is applied knowing the molar mass: if 46 g is 1 mol of Li₂S, 500 g of the compound, how many moles are they?
[tex]moles=\frac{500 g*1mole}{46 g}[/tex]
moles≅10.87
It is now possible to calculate molarity by applying the definition:
[tex]M=\frac{10.87 moles}{4.44 L}[/tex]
M= 2.448 [tex]\frac{moles}{liter}[/tex]
The molarity of 500.0 grams of Li₂S in a total volume of 4.44 liters is 2.448 [tex]\frac{moles}{liter}[/tex]
Which sentence is a scientific statement?
Answer:
It depends what are the choices that are given.
Answer:
Explanation:
Which sentence is a scientific statement?
A. Long hair looks better than short hair.
B. Brick structures insulate better than wooden structures.
C. Milkshakes should always be sweetened with honey.
D. There is a large, apelike creature living in the Himalayas.
What is the electron structure of a sodium atom?
A. 1s22s22p63s1
B. 2s22s22p63s1
C. 1s22s22p63s6
D. 1s12s22p63s1
Answer:
1s22s22p63s1 is the electronic configuration of sodium.
Explanation:
There are 11 electrons in Sodium ( find this on the periodic table).
Then you need to arrange the electrons in the orbitals around the nucleus.
The structure would be written as A. 1s^22s^22p^63s^1
how many grams of NH3 is made if 11 grams of N2 are used
here is the answer:
if we take the molecular formula, then
28 g Nitrogen forms 17 g ammoni.
so, 11 g Nitrogen forms 17/28 × 11=6.67 g ammonia.
Hence 6.67 g NH3 is formed by 11 g N2
Answer:
13.35 grams of NH₃ is made if 11 grams of N₂ are used.
Explanation:
First of all you should know that the balanced reaction is:
N₂(g) + 3 H₂-> 2 NH₃(g)
Then, it is possible to determine the mass of each compound that reacts or is produced in the reaction by knowing the atomic mass of each element:
N: 14 g/moleH: 1 g/moleThen:
N₂: 2*14 g/mole= 28 g/moleH₂: 2*1 g/mole= 2 g/moleNH₃: 14 g/mole+3*1 g/mole= 17 g/moleBy reaction stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction) you can see that they react or are obtained in moles:
N₂: 1 moleH₂: 3 molesNH₃: 2 molesThen, by the reaction stoichiometry of the reaction, you can see the amounts of mass that react or are obtained:
N₂: 1 mole*28 g/mole= 28 gH₂: 3 moles*2 g/mole= 6 gNH₃: 2 moles*17 g/mole= 34 gTo calculate the amount of NH₃ mass produced if 11 grams of N₂ are used, it is possible to use a rule of three knowing the stoichiometry of the reaction. The rule of three used is the following: if 28 grams of N₂ produce 34 grams of NH₃, 11 grams of N₂ how many grams of NH₃ will they produce?
[tex]gramsofNH_{3} =\frac{11gramsofN_{2} *34gramsofNH_{3} }{28 grams of N_{2} }[/tex]
grams of NH₃=13.35
Then, 13.35 grams of NH₃ is made if 11 grams of N₂ are used.
I mark brainliest pls help
Answer:
c
Explanation:
Answer:
I want to say the answer is B
Explanation:
CAN SOMEONE REWRITE/SHORTEN THIS FOR ME PLEASE? I'LL GIVE BRAINLIEST
Genetically modified organisms/ GMOs can be defined as organisms in which the genetic material (DNA) has been altered in a way that does not occur naturally by mating and/or natural recombination. The technology is often called “modern biotechnology” or “gene technology”, sometimes also “recombinant DNA technology” or “genetic engineering”. It allows selected individual genes to be transferred from one organism into another, also between nonrelated species. Foods produced from or using GM organisms are often referred to as GM foods.
GM foods are developed and marketed because there is some advantage either to the producer or consumer of these GM foods. This is meant to translate into a product with a lower price, greater benefit ,or both. GM seed developers wanted their products to be accepted by producers and have concentrated on innovations that bring direct benefit to farmers and generally the food industry.
One objective for developing plants based on GM organisms is to improve crop protection. The GM crops currently on the market are mainly aimed at an increased level of crop protection through the introduction of resistance against plant diseases caused by insects or viruses or through increased tolerance towards herbicides.
Resistance against insects is achieved by incorporating into the food plant the gene for toxin production from the bacterium Bacillus thuringiensis. This toxin is currently used as a conventional insecticide in agriculture and is safe for human consumption. GM crops that inherently produce this toxin have been shown to require lower quantities of insecticides in specific situations, where pest pressure is high. Virus resistance is achieved through the introduction of a gene from certain viruses which cause diseases in plants. Virus resistance makes plants less susceptible to diseases caused by such viruses, resulting in higher crop yields.
Answer:
Here you go! 50% of your writing piece
Explanation:
Foods produced from or using GM organisms are often referred to as GM foods.
GM foods are developed and marketed because there is some advantage either to the producer or consumer of these GM foods. GM seed developers wanted their products to be accepted by producers and have concentrated on innovations that bring direct benefit to farmers and generally the food industry.
One objective for developing plants based on GM organisms is to improve crop protection. The GM crops currently on the market are mainly aimed at an increased level of crop protection through the introduction of resistance against plant diseases caused by insects or viruses or through increased tolerance towards herbicides.
Resistance against insects is achieved by incorporating into the food plant the gene for toxin production from the bacterium Bacillus thuringiensis. GM crops that inherently produce this toxin have been shown to require lower quantities of insecticides in specific situations, where pest pressure is high.
GMOs are organisms with artificially altered DNA through genetic engineering, used in agriculture, medicine, and conservation. They offer benefits like improved crops and medicinal advances but are also subject to regulatory scrutiny and public debate over safety and environmental impact.
Genetically Modified Organisms (GMOs)
Genetically modified organisms (GMOs) are those whose genetic material has been altered in ways that do not occur naturally. This process, also known as genetic engineering or recombinant DNA technology, enables the introduction of new traits to an organism. For example, genes conferring pest resistance or tolerance to herbicides can be transferred from one organism to another, even between nonrelated species. This technology has applications in agriculture for crop protection, enhancing nutritional content, and improving food production efficiency. Additionally, GMOs have promising applications in environmental conservation, medicine production, and may even address issues like plastic pollution.
However, GMOs are subject to intense debate regarding consumer safety, environmental impact, and ethical concerns. Despite their benefits, such as reduced pesticide use and increased yields, concerns about potential ecological effects, unintended health consequences, and gene transfer to non-target species lead to strict regulation and public caution. Yet, after comprehensive research, GMOs have been deemed safe for consumption.
What is the specific heat of the metal?
cal/g.°C
Answer:
0.1648
Explanation:
The specific heat of a metal measures the amount of heat energy required to raise its temperature. It is measured in cal/g.°C and varies depending on the type of metal.
Explanation:The specific heat of a metal is a property that measures the amount of heat energy required to raise the temperature of a certain amount of the metal by a certain number of degrees Celsius. It is typically measured in units of cal/g.°C.
For example, let's say we have a metal with a specific heat of 0.5 cal/g.°C. This means that it takes 0.5 calories of heat energy to raise the temperature of 1 gram of the metal by 1 degree Celsius.
Specific heat can vary depending on the type of metal. Different metals have different atomic structures, which affect how they absorb and retain heat. Therefore, each metal has its own specific heat value.
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What is the expected product when l-propanol is oxidized?
propanal
propanoic acid
propanone
propene
PLEASE EXPLAIN HOW YOU GOT YOUR ANSWER
Answer: propanal and propanoic acid
Explanation: first of all Oxidation of alcohol with mild oxidizing reagent PCC gives Carbonyl compounds and with strong oxidizing agent like CrO3 and kmno4 gives carboxylic acids.
And primary alcohol gives Aldehyde with mild oxidizing reagent and carboxylic acids with strong oxidizing agent.
And ketone is formed with secondary alcohol by both mild and strong Oxidizing agent.
Here our compound is primary alcohol hence we will get propanal and propanoic acid depending on type of Oxidizing agent
Answer:
propanoic acid
Explanation:
One of the properties of alkanols is the fact that they can be oxidized to various products depending on the structure of the alkanol.
A primary alkanol (such as 1-propanol) is oxidized to an alkanal and subsequently to an alkanoic acid.
A secondary alkanol is oxidized to an alkanone while a tertiary alkanol is not oxidized.
This implies that the final product of the oxidation of 1-propanol is propanoic acid as shown in the answer.
Why are redox reactions used in batteries?
The attraction between charged ions releases energy.
The movement of electrons creates an electric current.
The reactions are extremely exothermic, producing an electric current.
The reactions are extremely endothermic, inducing the movement of electrons.
Answer:
The movement of electrons creates an electric current.
Explanation:
Batteries are electrochemical cells which are devices in which chemical reactions produce an electric current, that is, devices for converting chemical energy into electrical energy.
The reactions involved here are spontaneous redox reactions hence an electric current flows on its own in the external circuit.
In such reactions, there is an electronic movement which creates a potential difference between the two electrodes thereby generating a flow of an electric current in the external circuit. The current flows in the opposite direction to the electronic movement due to chemical reactions.
The flow of the electric current results in an the production of electrical energy while the electronic movement instigates a chemical energy.
Answer:
There's no one-upping that one so I'll just tell you that it was right on my test :)
Explanation:
you're welcome
Give the number of significant figures: 369,132,000 sec
A. 0
B. 6
C. 9
Answer:
A. 6
Explanation:
369 132 000 s
The important rules are
• Digits other than zero are significant
• Trailing zeroes before the decimal point are not significant
The decimal point is after the last zero, so the three zeroes are not significant,
Thus, the underlined digits in 369 132 000 are significant.
There are six significant figures in the measurement.
A. 6
is the answer for this problem
What is the pH of a 0.00750 M solution of hydrochloric acid, HCl? (2 points) pH = 1.45 pH = 1.93 pH = 2.12 pH = 3.07
Ph = - Log (Hcl)
= - Log (0.00750)
= 2.12
Ph = 2.12
Answer: pH = 2.12
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxide ion concentration.
[tex]pH=-\log [H^+][/tex]
[tex]pOH=-log{OH^-}[/tex]
[tex]pH+pOH=14[/tex]
Give :[tex][H^+][/tex] = 0.00750
[tex]pH=-log[0.00750][/tex]
[tex]pH=2.12[/tex]
4. What mass of urea is produced from 9.0 liters of ammonia?
The reaction is 2NH3(g) + CO2(g) → H2NCONH2(g) + H2Og)
Answer:
12.07 g.
Explanation:
The balanced equation for the mentioned reaction is:2NH₃(g) + CO₂(g) → H₂NCONH₂(g) + H₂O(g),
It is clear that 2.0 moles of NH₃ react with 1.0 mole of CO₂ to produce 1.0 mole of H₂NCONH₂ and 1.0 moles of H₂O.
Consider the reaction proceeds at STP conditions:At STP, 9.0 L of NH₃ react with an excess of CO₂ gas:
It is known that at STP: every 1.0 mol of any gas occupies 22.4 L.
using cross multiplication:
1.0 mol of NH₃ represents → 22.4 L.
??? mol of NH₃ represents → 9.0 L.
∴ 9.0 L of NH₃ represents = (1.0 mol)(9.0 L)/(22.4 L) = 0.4018 mol.
To find the no. of moles of urea (H₂NCONH₂) produced:Using cross multiplication:
2.0 mol of NH₃ produce → 1.0 mol of H₂NCONH₂, from stichiometry.
0.4018 mol of NH₃ produce → ??? mol of H₂NCONH₂.
∴ The no. of moles of H₂NCONH₂ = (1.0 mol)(0.4018 mol)/(2.0 mol) = 0.201 mol.
Now, we can find the mass of H₂NCONH₂ produced:mass = n * molar mass = (0.201 mol) * (60.06 g/mol) = 12.07 g.
The mass of urea produced from 9.0 litres of ammonia is 12.227 grams.
To solve this problem, we need to follow these steps:
1. Write down the balanced chemical equation:
[tex]\[ 2NH_3(g) + CO_2(g) \rightarrow H_2NCONH_2(g) + H_2O(g) \][/tex]
2. Calculate the molar mass of ammonia[tex](\( NH_3 \))[/tex]:
- The atomic mass of nitrogen (N) is approximately 14.01 g/mol.
- The atomic mass of hydrogen (H) is approximately 1.008 g/mol.
- Since there are 3 hydrogen atoms in ammonia, the total atomic mass for hydrogen is ([tex]\( 3 \times 1.008 \)[/tex]) g/mol.
- The molar mass of ammonia is [tex]\( 14.01 + (3 \times 1.008) \)[/tex] g/mol.
3. Convert the volume of ammonia to moles:
- The density of ammonia gas at standard conditions is approximately 0.771 g/L.
- Convert the volume of ammonia from litres to grams using the density.
- Then, convert grams of ammonia to moles using the molar mass calculated in step 2.
4. Use the stoichiometry of the balanced equation to find the moles of urea[tex](\( H_2NCONH_2 \))[/tex]produced:
- According to the balanced equation, 2 moles of ammonia produce 1 mole of urea.
- Therefore, the moles of urea produced will be half the moles of ammonia.
5. Calculate the molar mass of urea [tex](\( H_2NCONH_2 \))[/tex]:
- The molar mass of urea can be calculated by adding the atomic masses of the constituent atoms.
- Urea consists of 2 nitrogen atoms, 4 hydrogen atoms, 1 carbon atom, and 1 oxygen atom.
6. Convert the moles of urea to grams:
- Multiply the moles of urea by its molar mass to get the mass in grams.
Now, let's perform the calculations:
1. Molar mass of [tex]\( NH_3 \):[/tex]
[tex]\[ \text{Molar mass of } NH_3 = 14.01 + (3 \times 1.008) = 17.034 \text{ g/mol} \][/tex]
2. Mass of 9.0 liters of ammonia:
[tex]\[ \text{Mass of } NH_3 = 9.0 \text{ L} \times 0.771 \text{ g/L} = 6.939 \text{ g} \][/tex]
3. Moles of ammonia:
[tex]\[ \text{Moles of } NH_3 = \frac{6.939 \text{ g}}{17.034 \text{ g/mol}} \approx 0.4073 \text{ mol} \][/tex]
4. Moles of urea produced:
[tex]\[ \text{Moles of urea} = \frac{0.4073 \text{ mol}}{2} \approx 0.20365 \text{ mol} \][/tex]
5. Molar mass of urea[tex](\( H_2NCONH_2 \))[/tex]:
[tex]\[ \text{Molar mass of urea} = 2 \times 14.01 + 4 \times 1.008 + 12.01 + 16.00 = 60.062 \text{ g/mol} \][/tex]
6. Mass of urea produced:
[tex]\[ \text{Mass of urea} = 0.20365 \text{ mol} \times 60.062 \text{ g/mol} \approx 12.227 \text{ g} \][/tex]
Therefore, the mass of urea produced from 9.0 litres of ammonia is approximately 12.227 grams.
The correct answer is [tex]\boxed{12.227 \text{ g}}.[/tex]
The complete question is:
What mass of urea is produced from 9.0 litres of ammonia?
The given reaction is [tex]2NH_3(g) + CO_2(g) = H_2NCONH_2(g) + H_2O(g)[/tex]
If Maria winks exactly 5 times every minute and she sleeps
exactly 8 hours a day, how many times does Maria wink every
day?
Answer:
4800 times does Maria wink every day.
Explanation:
Number of time Maria winks= 5 times in minute = 5 winks/min
Number of hours she sleeps in day = 8 hours
1 day = 24 hours
Number of hours when Maria is not sleeping = 24 hour - 8 hour = 16 hours
1 hour = 60 minutes
16 hours = 16 × 60 min = 960 min
number of winks in 960 minutes:
[tex]960 min\times 5 winks/min=4800 winks[/tex]
4800 times does Maria wink every day.
She winks 192 times every day.
This is just basic arithmetic.
In a day, we have 24 hours.
Now, 60 minutes make an hour.
Thus,
Number of minutes in a day = 60 × 24 = 1440 minutes
She sleeps 8 hours a day.
This is same as; 8 × 60 = 480 minutes
Thus, total time she is awake in a day = 1440 - 480 = 960 minutes
She winks every 5 minutes.
Thus, number of winks = 960/5 = 192 winks
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4. Why is cooking an endothermic process?
A) Uncooked food contains more chemical energy than cooked food.
B) Energy is continuously added for the chemical reactions to take place.
C) The chemical reactions involved in burning fuels release energy
Answer:
Hi there!
The answer that best fits is B: Energy is continuously added for the chemical reactions to take place.
Explanation:
Endothermic means energy GOING IN not releasing.
Answer: The correct answer is Option B.
Explanation:
Endothermic reactions are defined as the reactions in which energy is absorbed by the system. The total enthalpy of the reaction comes out to be positive.
Exothermic reactions are defined as the reactions in which energy is released by the system. The total enthalpy of the reaction comes out to be negative.
Cooking is a type of endothermic reaction because in this process, energy is given to the uncooked food continuously. Energy is getting absorbed by the food for the chemical reactions to take place.
Thus, the correct answer is Option B.
each reation releases or absorbs a very large amount of energy per atom.
A.chemical and nuclear reaction
B. Chemical reactions.
C. no reaction
D. nuclear reation
Answer:
chemical and nuclear reaction
Explanation:
Answer: Option (D) is the correct answer.
Explanation:
A chemical reaction is defined as a reaction that involves exchange of electrons between the combining atoms. Not every chemical reaction releases or absorbs a very large amount of energy per atom.
On the other hand, a reaction that involves change in atomic nuclei of an atom either by splitting or combining of two atomic nuclei is known as a nuclear reaction.
For example, [tex]^{2}_{1}H + ^{3}_{1}H \rightarrow ^{4}_{2}He + ^{1}_{0}n + Energy[/tex]
Nuclear fission is a reaction in which a large nucleus splits by absorption of energy into two atomic nuclei. Nuclear fusion is a reaction in which two atomic nuclei combine together to result in the formation of a large atomic nuclei along with release of energy.
Each nuclear reaction releases or absorbs a very large amount of energy per atom.
Therefore, we can conclude that each nuclear reaction releases or absorbs a very large amount of energy per atom.
A 520-gram sample of seawater contains 0.317 moles of NaCl. What is the percent composition of NaCl in the water?
The answer is in the photo.
Answer:
3.56 %
Explanation:
Percent composition of NaCl = [tex]\frac{mass of NaCl}{mass of sea water }[/tex] x 100
Mass of sea water = 520 g
Moles of NaCl = 0.317 mol
Molar mass of NaCl = 58.44 g/mol
Mass of NaCl = moles of NaCl x Molar mass of NaCl
= 0.317 mol x 58.44 g/mol = 18.52 g
Percent composition of NaCl = [tex]\frac{18.52 g}{520 g}[/tex] x 100 = 3.56 %
A student increases the temperature of a 417 cm3 balloon from 65°C to 126°C. What will the new volume of the balloon be?
Answer:
492.3 cm³.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If P and n are constant, and have different values of T and V:(V₁T₂) = (V₂T₁).
V₁ = 417.0 cm³, T₁ = 65°C + 273 = 338 K.
V₂ = ??? cm³, T₂ = 126°C + 273 = 399 K.
∴ V₂ = (V₁T₂)/(T₁) = (417.0 cm³)(399 K)/(338 K) = 492.3 cm³.
Answer:
492.3 cm³.
Explanation:
Tutorial queshers Set 1
| Why does molecule become a chiral if has a Plane of symmetry even through it has stereocenter
Answer:
Here's what I get.
Explanation:
Consider the molecule shown below.
It has two chiral centres, labelled R and S, and an internal mirror plane that makes the right and left halves of the molecule mirror images of each other.
If we pass a beam of plane-polarized light through the sample, the R portion of the molecule will rotate the light in a certain direction.
However, the S portion will rotate the light by the same amount in the opposite direction.
The two effects cancel each other, so the molecule has no net effect on plane-polarized light.
Even though the molecule has two chiral centres, it is achiral because it has an internal plane of symmetry.
2000g of copper initially at 25C absorbs 1000J of heat. What is final temperature
Answer:
26.3°C.
Explanation:
To solve this problem, we can use the relation:Q = m.c.ΔT,
where, Q is the amount of heat absorbed by copper (Q = 1000 J).
m is the mass of the copper (m 2000 g).
c is the specific heat of copper (c = 0.385 J/°C.g).
ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = final T - 25°C).
∵ Q = m.c.ΔT
∴ (1000 J) = (2000 g)(0.385 J/°C.g)(final T - 25°C)
∴ (final T - 25°C) = (1000 J)/(2000 g)(0.385 J/°C.g) = 1.299.
∴ final T = 25°C + 1.299 = 26.299°C ≅ 26.3°C.
How many molecules are in 257 grams of chlorine (Cl2)? Show your work in the space below. HELPPPP
Answer:
2.2 × 10^24 molecules
Explanation:
First of all, we need to know the molar mass of chlorine which can be found by using its atomic mass.
molar mass of Chlorine ([tex]Cl_2[/tex]) = [tex]35.453 \times 2[/tex] = 70.906 g/mol
It means that one mole of Chlorine has a mass of 70.906 g.
Number of moles present in 257 grams sample = [tex]\frac{257}{70.906}[/tex] = 3.62 moles
We know that, [tex]1mol = 6.022 \times 10^{23}[/tex]
So we will multiply the number of moles present in 257 grams of Chlorine with this number to find the number of molecules.
Number of molecules in 257 grams of Chlorine = [tex]3.62 \times 6.022 \times 10^{23}[/tex] = 2.2 × 10^24 molecules
If a pond is located in an area with significant amounts of air pollution, which health measure would be most directly affected?
A: pH
B: nitrates
C: turbidity
D: dissolved oxygen
If a pond is located in an area with significant amounts of air pollution then pH would be most directly affected.
What is pH?The term pH is a measurement that indicates the acids and bases of a particular solution.
In this case, the pond represents an aqueous solution whose pH can change in different situations.The pH can change by different pollutants in an environment because it modifies the acid/basic level of a solution.In conclusion, if a pond is located in an area with significant amounts of air pollution then pH would be most directly affected.
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How many moles of FeS2 are required to produce 32g of SO2?
Answer:
So, the right answer is
No. of moles of FeS₂ = 0.25 mole
Explanation:
From the balanced
4 FeS2 + 11 O2 → 2 Fe2O3 + 8 SO2
it is clear that 4 mol FeS₂ react with O₂ to give Fe₂O₃ and 8 mol of SO₂
First, we have to convert mass of SO₂ into No. of moles as following:
SO₂ has molar mass = 64 g/mol
No. of moles of SO₂ = (mass / molar mass) = (32 g / 64 g/mol) = 0.5 mol
we know that
4 mol FeS₂ gives→ 8 mol of SO₂
1 mol FeS₂ gives→ 2 mol of SO₂
??? mol FeS₂ gives→ 0.5 mol of SO₂
No. of moles of FeS₂ = (0.5 mol * 1 mol ) / 2 mol = 0.25 mol
So, the right answer is
No. of moles of FeS₂ = 0.25 mol
To produce 32g of SO₂, 0.25 moles of FeS₂ are required. This is determined using the balanced chemical equation and mole ratio conversions. The calculation involves determining the moles of SO₂ and then using the ratio from the equation.
Number of moles of FeS₂ are required to produce 32g of SO₂, we start by looking at the balanced chemical equation for the reaction: 4 FeS₂ + 11 O₂ → 2 Fe₂O₃ + 8 SO₂
From the equation, 4 moles of FeS₂ produce 8 moles of SO₂. We need to determine the moles of SO₂ present in 32g:
Step 1: Calculate moles of SO₂
Molar mass of SO₂ = 32.07 (S) + 2*16.00 (O) = 64.07 g/mol
Moles of SO₂ = 32g / 64.07 g/mol = 0.5 moles of SO₂
Step 2: Use the mole ratio to find moles of FeS₂
According to the balanced equation, the mole ratio of FeS₂ to SO₂ is 4:8 or 1:2.
Therefore, moles of FeS₂ required = 0.5 moles SO₂ * (4 moles FeS₂ / 8 moles SO₂) = 0.25 moles of FeS₂
Thus, we need 0.25 moles of FeS2 to produce 32g of SO2.
Write the chemical symbols for three different atomic cations that all have 13 protons.
The chemical symbols for three different atomic cations that all have 13 protons:-
[tex]Al^{+1} ,Al^{+2} ,Al^{+3} [/tex]
Atomic number:-
The atomic number defines the number of protons in an atom.
Atomic cations are [tex]Al^{+1} ,Al^{+2} ,Al^{+3} [/tex]
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Chem Questions pls help
Answer:
2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O.
Explanation:
A combustion reaction is a major class of chemical reactions. Combustion usually occurs when a hydrocarbon reacts with oxygen to produce carbon dioxide and water.The balanced equation of combustion of octane is:2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O.
1.0 mole of octane is combusted completely with 25.0 mole of O₂ to produce 16.0 mole of CO₂ and 18.0 mole of H₂O.
If I have 340 mL of a 1.5 M NaBr solution, what will the concentration be if I add 560 mL water to it?
Answer:
0.5667 M ≅ 0.57 M.
Explanation:
It is known that the no. of millimoles of a solution before dilution is equal to the no. of millimoles of the solution after the dilution.It can be expressed as:(MV) before dilution = (MV) after dilution.
M before dilution = 1.5 M, V before dilution = 340 mL.
M after dilution = ??? M, V after dilution = 340 mL + 560 mL = 900 mL.
∴ M after dilution = (MV) before dilution/(V) after dilution = (1.5 M)(340 mL)/(900 mL) = 0.5667 M ≅ 0.57 M.
Widespread use of fuel cell vehicles poses a danger because
fuel cells emit a greenhouse gas that endangers the ecosystem.
it is hard to build fuel cell vehicles that travel slowly enough to match speed limits.
hydrogen used to power fuel cells could run out and disappear from Earth.
it is difficult to safely transport and store hydrogen gas before it is used.
Answer:
It is difficult to safely transport and store hydrogen gas before it is used.
Explanation:
A mixture of hydrogen gas and oxygen causes an explosive reaction. Any minimal leak would mean a fire hazard. If it was in a series of storage equipment, a single explosion would lead to a series of other explosions that would lead to a massive loss of property and possibly, life.
Answer:
Widespread use of fuel cell vehicles poses a danger because
it is difficult to safely transport and store hydrogen gas before it is used.
Explanation:
A furl cell is used in a fuel cell vehicle instead of a battery.
By the use of Oxygen and compressed hydrogen electricity is generated to give power to the motor. The transportation and the process of storing hydrogen create pollutants. The primary energy which helps in the production of hydrogen is the main aspect on which the impact of the fuel cell depends upon.
Which is most likely to be the energy source for organisms living in hydrothermal vents?
A: oxygen
B: sunlight
C: methane
D: carbon dioxide
Methane because I just know and it is very hard to explain
The organisms living in the hydrothermal vent are provided by the energy with methane. Thus, option C is correct.
What are hydrothermal vents?Hydrothermal vents are the fissures near the volcanos in the seafloor that supports the ecosystem deep inside the sea.
The animals near the hydrothermal vents are octopus, crabs, zoarcid fishes, etc. The living of the organism in the cold water in the vent is supported by the absence of sunlight. The carbon compound act as the energy source at the hydrothermal vent.
Thus, the organisms in the hydrothermal vent are supported with energy by methane molecules. Hence, option C is correct.
Learn more about the hydrothermal vent, here:
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I Need Help With This One!!!
Answer:
Deforestation due as a result of development
Explanation:
As economies advance the need for more space to put up more infrastructure increases. This leads to the clearing of forests leaving widespread bare lands as the one shown in the picture provided, that have the long term effect of desertification.
Which prefix would appear in the IUPAC name for a covalent compound that has four atoms of a single element?
tri-
di-
tetra-
mono-
Answer:
tetra-.
Explanation:
In IUPAC system, when naming molecular compounds prefixes are used to dictate the number of a given element present in the compound:” mono-” indicates one,
“di-” indicates two,
“tri-” is three,
“tetra-” is four,
“penta-” is five,
“hexa-” is six,
“hepta-” is seven,
“octo-” is eight,
“nona-” is nine,
and “deca” is ten.
So, the right choice is: tetra-.
2.5 moles of sodium chloride is dissolved
to make 0.050 liters of solution.
The answer is:
the molarity = 50 moles/liters
The explanation:
when the molarity is = the number of moles / volume per liters.
and when the number of moles =2.5 moles
and the volume per liters = 0.05 L
so by substitution:
the molarity = 2.5moles/0.05L
= 50 moles /L
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