Stoichiometry Practice Challenge

What is the coefficient of H2S when balancing the equation to ensure 8 sulfur atoms on the right?

• 2

• 4

• 16

• 8

How many moles of chlorine (Cl2) are required to produce 50.4 moles of HCl?

• 50.4 moles

• 25.2 moles

• 100.8 moles

• 12.6 moles

What is the molar mass of propane (C3H8) used in the grams to grams conversion?

• 30.07 grams/mole

• 44.094 grams/mole

• 28.05 grams/mole

• 58.124 grams/mole

How many grams of O2 are needed to completely react with 81.7 grams of propane?

• 150 grams

• 500 grams

• 296 grams

• 350 grams

What is the coefficient ratio of H2O to H3PO4 in the balanced equation from Part C?

• 3:2

• 4:1

• 2:3

• 1:1

How many grams of phosphoric acid (H3PO4) can be produced from 5.64 grams of water?

• 20.5 grams

• 41 grams

• 10.25 grams

• 30.75 grams

What is the molar mass of water used in the conversions?

• 16.00 grams/mole

• 17.01 grams/mole

• 20.02 grams/mole

• 18.016 grams/mole

What is the final balanced coefficient of NH3 when balancing the equation in Part II?

• 4

• 6

• 2

• 3

How many grams of water are produced from 38.4 grams of nitrogen gas?

• 44.4 grams

• 14.8 grams

• 59.2 grams

• 29.6 grams

What is the ratio of moles of water to moles of nitrogen in the final balanced equation of Part II?

• 1:1

• 6:5

• 5:6

• 2:3