Stoichiometry

Using the following equation: Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l) How many moles of iron (Fe) can be made from 6 moles H2?

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

Tags

NGSS.HS-PS1-7

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

• a. 13

• b. 8.8

• c. 0.99

• d. 1.0

Tags

NGSS.HS-PS1-7

How many moles are in 19.82 g Mg? 

• a. 1.226mol Mg

• b. 481.7mol Mg

   

• c. 0.82 mol Mg

• d. 1.000mol Mg

How many particles are in a mole?

• a. 602

• b. 602 million

  ³

• c. 602 moles

• d. 6.02 x 10²³

O₂ + CS₂ --> CO₂ + SO₂ What coefficient would go in front of the O₂?

• a. 1

• b. 3

• c. 2

• d. 4

Tags

NGSS.HS-PS1-7

mole of any gas at STP has a volume of ______________________. 

• a. 22.4 liters

• b. 44.2 liters

• c. 6.02 x 10²³ liters

• d. 2.4 liters

What is the molar mass of water (H2O)?

• 18 g/mol

• 16 g/mol

• 20 g/mol

• 22 g/mol

In the reaction @@ ext{2H}_2 + ext{O}_2 ightarrow ext{2H}_2 ext{O}@@, how many moles of water are produced from 4 moles of hydrogen gas?

• 2 moles

• 4 moles

• 6 moles

• 8 moles

Tags

NGSS.HS-PS1-7

What is the stoichiometric coefficient for oxygen in the balanced equation of the combustion of methane: @@ ext{CH}_4 + ext{2O}_2 ightarrow ext{CO}_2 + ext{2H}_2 ext{O}@@?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

How many grams of carbon dioxide are produced from 44 grams of propane (C3H8) in a complete combustion reaction?

• 132 g

• 88 g

• 44 g

• 176 g

Tags

NGSS.HS-PS1-7