Stoichiometry Test Review

2Na + 2H₂O → 2NaOH+ H₂
How many grams of hydrogen are produced if 120 g of Na are available?

• 5.2 g
• 2.6 g
• 690 g
• 45 g

• 2 : 1

• 1 : 1

• 3 : 2

• 6 : 8

• 1 to 6

• 3 to 2

• 4 to 6

• 2 to 3

• 114.78 mol PbI₂

• 0.904 grams PbI₂

• 0.904 mol PbI₂

• 114.78 grams PbI₂

According to this equation:

CH₄ + 2O₂ → CO₂ + 2H₂O, what is the mole ratio of oxygen to carbondioxide?

• 1 gram O₂ / 2 grams CO₂

• 1 mole O₂ / 2 moles CO₂

• 2 grams O₂ / 1 grams CO₂

• 2 moles O₂ / 1 mole CO₂

• 6.35g

• 10.24g

• 5.12g

• 12.70

What is the measured amount of a product obtained from a chemical reaction?

• mole ratio
• theoretical yield
• percentage yield
• actual yield

2Al + 6HCl --> 2AlCl₃ + 3H₂

Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?

• 13

• 8.8

• 0.99

• 1.0

the substance that is not used up completely in a reaction

• excess reactant

• composition stoichiometry

• mole ratio

• limiting reactant

When the equation: Al_(s) + O_2(g) →Al₂O_3(s)

is correctly balanced using smallest whole numbers, what is the coefficient of Al?

• 3

• 4

• 5

• 6