Stoichiometry

How many waffles can be made from 1 dozen eggs, assuming you have enough of all other ingredients?

Given Recipe: 2 cups flour + 3 eggs + 1 tbs oil → 4 waffles

• 48

• 12

• 4

• 16

Diatomic N₂ can react with diatomic H₂ to form ammonia (NH₃). The balanced chemical equation is:

N₂ + 3H₂ -----> 2NH₃

If 6 moles of H₂ totally reacted with more than enough N₂, how many moles of ammonia would be expected to form?

• 2 moles

• 3 moles

• 4 moles

• 6 moles

How many moles of water are made from complete reaction of 2.2 moles of oxygen gas with hydrogen gas?

Given the reaction: 2H₂ + O₂ → 2H₂O

• 4.4

• 1.1

• 2.2

• 3.3

How many grams of water are made from the reaction of 4.0 grams of hydrogen gas?

Given the reaction: 2H₂ + O₂ → 2H₂O

• 18

• 72

• 36

• 4.5

How many grams of water are made from the reaction of 16.0 grams of oxygen gas?

Given the reaction: 2H₂ + O₂ → 2H₂O

• 18

• 9

• 36

• 16

How many grams of sodium metal are needed to make 29.3 grams of sodium chloride?

Given the reaction: 2Na + Cl₂ → 2NaCl

• 46.0

• 5.75

• 23.0

• 11.5

Consider the following generic chemical equation:

2A + 5B → C + 3D

If you react 4 units of A with 10 units of B, which statement is TRUE?

• Substance A will be the limiting reactant.

• Substance B will be the limiting reactant.

• There is just enough of A and B so that everything reacts completely.

• Substance C cannot be formed from this reaction.

The theoretical yield of a reaction is 75.0 grams of product and the actual yield is 42.0g. What is the percent yield?

• 75.0

• 56.0

• 31.5

• 178

What is the limiting reactant for the following reaction given we have 3.4 moles of Ca(NO₃)₂ and 2.4 moles of Li₃PO₄?

Reaction: 3Ca(NO₃)₂ + 2Li₃PO₄ → 6LiNO₃ + Ca₃(PO₄)₂

• Ca(NO₃)₂

• Li₃PO₄

• LiNO₃

• Ca₃(PO₄)₂

How many moles of NH3 can be produced by the reaction of 2.00 g of N₂ with 3.00 g H₂?

Reaction: N₂(g) + 3 H₂(g) → 2 NH₃(g)

• 0.143

• 0.0567

• 0.235

• 1.00