Stoichiometry Review

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

• 6.7 mol
• 1.0 mol
• 10.1 mol
• 4.5 mol

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.HS-PS1-7

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

• 13.7 mol
• 2.75 mol
• 6.11 mol
• 6.85 mol

Tags

NGSS.HS-PS1-7

This is the equation for the catalytic oxidation of ammonia.

4NH₃ + 5O₂ --> 4NO + 6H₂O. How many moles of NO are formed if 824 g of NH₃ react?

• 4 moles

• 48.5 moles

• 97 moles

• 824 g

This is the equation for the catalytic oxidation of ammonia.

4NH₃ + 5O₂ --> 4NO + 6H₂O. How many grams of water are formed if 2.5 moles of NH₃ are oxidized?

• 67.555 g

• 2 moles

• .092592592 moles

• 5

This is the equation for the catalytic oxidation of ammonia.

4NH₃ + 5O₂ --> 4NO + 6H₂O. How many moles of oxygen are needed to react with 4.6 moles of ammonia?

• 20 g

• 5 moles

• 5.8 moles

• 11.6 moles

Mercury (II) oxide decomposes into mercury and oxygen gas according to the following balanced equation:

2HgO --> 2Hg + O₂

How many moles of HgO are needed to produce 125 g of oxygen?

• 7.81 moles

• 8 g

• 14 moles

• 250 g

Mercury (II) oxide decomposes into mercury and oxygen gas according to the following balanced equation:

2HgO --> 2Hg + O₂

How many grams of oxygen will be produced if 2.3 moles of mercury are produced?

• 52 g

• 98.5 g

• 4 moles

• 37 g

Mercury (II) oxide decomposes into mercury and oxygen gas according to the following balanced equation:

2HgO --> 2Hg + O_2.

How many moles of mercury are produced if 24.5 moles of HgO decompose?

• 2 moles

• 24.5 moles

• 1 mole

• 12.25 moles

Given the reaction: 6 Mg + P₄ → 2 Mg₃P₂

How many grams of Mg are needed in order to produce 1200 grams of Mg₃P₂?

• 53.4 grams
• 72.1 grams
• 87516 grams
• 649 grams