Chemistry and Stoichiometry

What is the purpose of stoichiometry in chemistry?

• To measure the mass of chemicals

• To balance chemical equations

• To convert atomic mass into grams

• To predict reactions

What is the relative atomic mass of carbon?

• 12.01 amu

• 16 amu

• 1.008 amu

• 55.85 amu

What is the definition of a mole?

• The number of atoms in 12 grams of carbon-12

• The number of atoms in 1 gram of carbon-12

• The number of atoms in 6.022 x 10^23 grams of carbon-12

• The number of atoms in 1 gram of any element

What is the molar mass of hydrogen?

• 1.008 g

• 12.01 g

• 55.85 g

• 16 g

How do you calculate the molar mass of a compound?

• By adding up the molar masses of its component elements

• By dividing the molar mass of the compound by the number of moles

• By multiplying the molar mass of the compound by Avogadro's number

• By subtracting the molar mass of the compound from the molar mass of carbon-12

What is the purpose of balancing a chemical equation?

• To determine the molar mass of the reactants

• To ensure the conservation of mass

• To calculate the specific masses of the products

• To convert atoms into grams

How many molecules of CO2 are produced when one molecule of sucrose is metabolized?

• 6.022 x 10^23

• 12

• 22

• 35

What is the ratio of sucrose to oxygen in the balanced equation?

• 1:1

• 1:2

• 1:11

• 1:12

How much oxygen is needed to burn 5 grams of sugar?

• 5.6 grams

• 12 grams

• 16 grams

• 35 grams

What is the purpose of stoichiometry in chemistry?

• To measure the mass of chemicals

• To balance chemical equations

• To convert atomic mass into grams

• To predict reactions