Stoichiometry and Matter Quiz

What is the stoichiometric coefficient of oxygen in the balanced chemical equation: 2C4H10 + 13O2 → 8CO2 + 10H2O?

• 13

• 8

• 5

• 2

What is the definition of a mole in chemistry?

• The unit of measurement for volume in chemistry

• Amount of a substance that contains the same number of entities as there are atoms in 12 grams of carbon-12

• The process of grinding a solid into a fine powder

• The small burrowing mammal with dark velvety fur

How many atoms are present in one mole of carbon?

• 3.14 x 10^23

• 1.505 x 10^24

• 9.999 x 10^22

• 6.022 x 10^23

Calculate the number of moles in 25 grams of water (H2O).

• 2.5 moles

• 0.25 moles

• 1.39 moles

• 0.5 moles

What is the mass of one mole of oxygen?

• 8.00 g/mol

• 16.00 g/mol

• 24.00 g/mol

• 32.00 g/mol

In a reaction, 4 moles of A react with 3 moles of B. Which is the limiting reactant?

• Both A and B

• A

• B

• None of the above

How many grams of water can be produced from 5 moles of hydrogen and 2 moles of oxygen?

• 3 moles of water

• 10 moles of water

• 7 moles of water

• 12 moles of water

Balance the chemical equation: C3H8 + O2 → CO2 + H2O

• C3H8 + 6O2 → 3CO2 + 4H2O

• C3H8 + 4O2 → 3CO2 + 4H2O

• C3H8 + O2 → 2CO2 + 2H2O

• C3H8 + 5O2 → 3CO2 + 4H2O

What is the molar mass of sulfuric acid (H2SO4)?

• 115.37 g/mol

• 42.08 g/mol

• 98.08 g/mol

• 63.55 g/mol

Calculate the molar mass of potassium permanganate (KMnO4).

• 158.034 g/mol

• 63.546 g/mol

• 205.07 g/mol

• 101.07 g/mol