Stoichiometry Problems

If 17.2 grams of aluminum react with hydrochloric acid (HCl), what volume of hydrogen gas will be produced?

• 21.4 L

• 578 L

• 1.15 L

• 14.3 L

When 5.7 grams of aluminum oxide decomposes, how many grams of aluminum metal are produced?

• 1.5 g

• 2.2 g

• 3.0 g

• 2.5 g

Tags

NGSS.HS-PS1-7

What mass of potassium iodide are needed to react with 3.62 grams of fluorine gas in a single replacement reaction?

• 601 g

• 91.8 g

• 15.8 g

• 31.6 g

Tags

NGSS.HS-PS1-7

What mass of water is produced when 25.5 grams of oxygen gas react with hydrogen?

• 14.3 g

• 28.7 g

• 35.7 g

• 7.18 g

Tags

NGSS.HS-PS1-7

The blue numbers in the image below represent ________

• I don't know, and don't want to try

• coefficients

• subscripts

• none of the answers are correct

What mass of sodium bromide will be produced when 0.69 moles of bromine gas react with sodium iodide in this single replacement reaction?

• 71.0 g

• 0.888 g

• 142 g

• 37.0 g

Tags

NGSS.HS-PS1-7

What volume of ethane (C₂H₆) is needed to react with 23.1 grams of oxygen in a combustion reaction?

• 6.60 L

• 16.2 L

• 11.2 L

• 4.62 L

Tags

NGSS.HS-PS1-7

Nitric acid is formed by the reaction of nitrogen dioxide with water: NO2 (g) + H2O (l) → NO (g) + HNO3 (aq) How many moles of water are needed to react with 8.4 mol NO2?

• 2.8 mol H₂O

• 3.0 mol H₂O

• 8.4 mol H₂O

• 25 mol H₂O

Tags

NGSS.HS-PS1-7

How many grams of fluorine are needed to react with 6.20 g of phosphorus?

• 2.85 g F₂

• 5.70 g F₂

• 11.4 g F₂

• 37.2 g F₂

Tags

NGSS.HS-PS1-7

Every stoichiometric calculation uses a balanced chemical equation.

• Never

• Sometimes

• True

• False

Tags

NGSS.HS-PS1-7