Moles and Stoichiometry Review

In the decomposition of glucose into carbon dioxide and ethanol(C2H5OH), how many grams of carbon dioxide are produced when 1 mole of glucose is reacted? The molar mass of glucose is 180 g/mol, and the molar mass of ethanol is 50 g/mol. 

• 80 grams

• 0 grams

• 40 grams

• 100 grams

What is the conversion factor from L to moles?

• 22.1 L = 1 mol

• 22.4 L = 1 mol

• 6.02 * 10^23 L = 1 mol

• 5.41 L = 1 mol

What is avogadro's number?

• 6.02 * 10^26

• 3.01 * 10^23

• 6.626 * 10^-34

• 6.02 * 10^23

How many moles of Ag are present in 150.14g of Ag?

• 1.5162 moles

• 2.4598 moles

• 1.3919 moles

• 3.1000 moles

Calculate the mass (in kg) of water produced from the combustion of 1.0 gallon (3.8 L) of gasoline (C₈H₁₈). The density of gasoline is 0.79 g/mL.

• 2.4kg H2O

• 1.8kg C8H18

• 4.3kg H2O

• 2675g H2O

O₂ is used in a closed-system breathing apparatus. It removes carbon dioxide and water from exhaled air. The reaction for the removal of water is: KO₂ + H₂O O₂ + KOH. The KOH produced is used to remove carbon dioxide by the following reaction: KOH + CO₂ KHCO₃. What mass of KO₂ produces 235 g of O₂?

• 969 g KO2

• 696 g KO2

• 736 g KO2

• 2145 g KO2

KO₂ is used in a closed-system breathing apparatus. It removes carbon dioxide and water from exhaled air. The reaction for the removal of water is: KO₂ + H₂O O₂ + KOH. The KOH produced is used to remove carbon dioxide by the following reaction: KOH + CO₂ KHCO₃. What mass of CO₂ can be removed by 123 g of KO₂?

• 76.1 g CO2

• 81.9 g CO2

• 24.8 g CO2

• 109 g CO2

How many moles of sodium atoms correspond to 1.56x10 21 atoms of sodium?

• 7.63x10^3mol Na atoms

• 1.92x10^3mol Na atoms

• 2.59x10^3mol Na atoms

• 9.60x10^4mol Na atoms

When 0.684 g of an organic compound containing only C, H, and O was burned in oxygen 1.312g CO2 and 0.805g H2O were obtained. The molecular mass of the compound is 92 g / mol. What is the molecular formula of the compound?

• C6H12O6

• C4H12O

• C6H10O2

• C2H6O

Calculate the number of moles of each compound: 21.5 g CaCO3.

• 0.215 mol

• 2.15 mol

• 5.12 mol

• 1.23 mol