The molar mass of carbon dioxide (CO2) is 44.01 g/mol. The molar mass of water (H2O) is 18.01 g/mol. A reaction uses 528 g of CO2. How many moles of water are used in this reaction?

Answers

Answer 1

Answer: The reaction that results from this is:

H2O + CO2 --> H2CO3

Ratio between water and CO2 is 1:1. So we can say that for every Mole of CO2, we need 1 Mole of water to produce 1 Mole of H2CO3. Thus as n=m/M we can find n = 528/44.01 = 11.997 ~ 12Mol.

Therefore, we need 12 moles of water.

Answer 2

Answer:

Answer:

12 moles

Explanation:

The reaction will form carbonic acid:

CO₂ + H₂O ⇒ H₂CO₃

For 528 g of CO₂, the number of moles (n) will be:

n = mass/molar mass

n = 528/44.01

n = 12 moles of CO₂

The stoichiometry is 1 mol of CO₂ reacts with 1 mol of H₂O, so 12 moles of CO₂ need 12 moles of H₂O.

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On a hot summer day Lam walked home from his grandmothers with a chocolate bar in his pocket. When he arrived home the chocolate bar had melted in his pocket, which statement BEST explains why thechocolate bar melted?A Heat transferred from the chocolate bar to his pocket.B. Heat evaporated from his pocket to his chocolate bar.c. Heat condensed from his leg to his chocolate bar in his pocket.D. Heat transferred from the environment to the chocolate bar in his pocket.

What do scientists usually do if they can't draw clear conclusions?

Answers

collect more data to support their hypothesis

They use the Scientific Method.
The Scientific Method is made up of steps scientists take to draw a conclusion
Step 1: Form a Question
Step 2: Research the Question
Step 3: Form a Hypothesis (educated guess)
Step 4: Conduct an Experiment (use quantitative and qualitative data)
Step 5: Form Your Conclusion Based on Results

This should help....

To calculate the amount of heat absorbed as a substance melts, which of the following information is NOT needed?a.
the mass of the substance
c.
the change in temperature
b.
the specific heat of the substance
d.
the density of the sample

Answers

To calculate the amount of heat absorbed as a substance melts, the information which we don't need is density.

What is the formula to calculate absorbed heat?

The formula which we used to calculate the amount of involved heat in a chemical reaction is:

Q = mcΔT, where

Q = absorbed heat
m = mass
c = specific heat
ΔT = change in temperature

Hence the information which we don't need is density.

To know more about heat absorbed, visit the below link:
brainly.com/question/8828503

#SPJ2

The answer is d. hope it helps!

Plants and animals interact with organic molecules differently. Explain how.

Answers

Answer:

All animals, all fungi, and some kinds of bacteria are heterotrophs and consumers

Explanation:

A sample of 76 g of NaCl is dissolved to make 1 L of solution. What is the molarity of the solution? Show your work.

Answers

The answer is 1.3 mol of NaCl.

We know that there is 76 g of NaCl in 1L of the solution.
But we need to calculate the molarity.
First, we will need the molar mass of NaCl, which is the sum of relative atomic masses of Na (22.99 g/mol) and Cl (35.45 g/mol):
Mr(NaCl) = A(Na) + A(Cl) = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol.

This says that there are 58.44 g of NaCl in 1 mole. So, in how many moles will be 76 g of NaCl)? Use the proportion:
58.44 g : 1 mol = 76 g : x

After crossing the products:
x * 58.44 g = 1 mol * 76 g
x = 76 / 58.44 mol = 1.3 mol

Answer:

1.3005 M

Explanation:

Given that:

Mass of NaCl = 76 g

Molar mass of NaCl = 58.44 g/mol

The formula for the calculation of moles is shown below:

$moles = (Mass\ taken)/(Molar\ mass)$

Thus,

$Moles= (76\ g)/(58.44\ g/mol)$

$Moles= 1.3005\ mol$

Given that volume = 1 L

Considering:

$Molarity=(Moles\ of\ solute)/(Volume\ of\ the\ solution)$

$Molarity=(1.3005)/(1)$

Molarity = 1.3005 M

Carbon disulfide (CS2) undergoes a single displacement reaction with O2 to form CO2. If 100 grams of CS2 reacts with 38 grams of O2, what will the limiting reagent be?CS2 + O2 CO2 + 2S

Answers

The balanced chemical reaction is:

CS2 + O2 = CO2 + 2S

We are given the amounts of the reactants. These amounts will be the starting point for the calculations. First, we convert these amounts into moles.

100 g CS2 (1 mol / 76.15 g ) = 1.3132 mol CS2
38 g O2 (1 mol / 32 g) = 1.1875 mol O2

From the reaction, the mole ratio of the reactants is 1:1. Therefore, the limiting reactant is CS2.

Answer: $O_2$

Explanation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of $CS_2=(100g)/(76g/mol)=1.3moles$

Moles of $O_2=(38g)/(32g/mol)=1.2moles$

For the given chemical reaction, the equation follows:

$CS_2+O_2\rightarrow CO_2+2S$

By Stoichiometry:

1 mole of oxygen reacts with 1 mole of carbon disulphide

So, 1.2 moles of oxygen reacts with = $(1)/(1)* 1.2=1.2moles$ of carbon disulphide

As, the required amount of carbon disulphide is more than the required amount. Hence, it is considered as the excess reagent. (1.3-1.2)= 0.1 mole will be left unused.

Oxygen is considered as a limiting reagent because it limits the formation of product.

Sulfur oxides Carbon monoxides Chlorofluorocarbons (CFCs)Nitrates are responsible for the hole in the ozone layer.

Answers

The best answer for the question above would be the chloroflourocarbons or the CFCs. These chloroflourocarbons or CFCs are the ones responsible for the depletion of the ozone - which leads to leaving a hole in its layer. These gases eat out the ozone layer and allows harmful UV rays of the sun to come in the Earth.

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