Stoichiometry

Front

If 3.29 x 10²³ atoms of potassium react with excess water, how many liters of hydrogen gas would be produced at STP?
2 K + 2 H₂O -->  2 KOH + H₂

Back

6L

Front

How many molecules are in 1 mole of CO₂?

Back

6.02 x 10 ²³ molecules

Front

What is the first step in stoichiometry? Options: Determine a balanced equation, convert grams to moles, convert grams to liters, use the mole ratio

Back

Determine a balanced equation

Front

N₂ +  3H₂ → 2NH₃
What is the mole ratio between Nitrogen and Ammonia in the above reaction?

Back

2 moles NH₃ / 1 moles N₂

Front

In the formation of CO₂ from CO and oxygen, how many Liters of CO₂ are produced by the reaction of 8 mols of O₂ with an excess of carbon monoxide?

Back

358.4 Liters

Front

B₂H₆ + 3O₂ --> 2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆? Options: 13.8 g O₂, 3.86 mol of O₂, 124 g O₂

Back

124 g O₂

Front

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

Back

3 mol MgO / 2 mol Fe

Front

Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from 3 moles of Fe₂O₃?

Back

6 moles Fe

Front

4 Al + 3 O₂ –> 2 Al₂O₃ How much aluminum is needed to completely react with 45 grams of O₂?

Back

1.875 moles

Front

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum? Options: 0.85 g, 290 g, 450 g, 870 g

Back

290 g