Unit 9 Review

What is the mole ratio for oxygen (O₂) to water(H₂O)?

2H₂ + O₂ --> 2 H₂O

• 2:2

• 1:2

• 1:1

• 3:1

What is the mole ratio for hydrogen (H₂) to oxygen (O₂)?

2H₂ + O₂ --> 2 H₂O

• 2:2

• 1:2

• 2:1

• 1:1

How many moles of oxygen (O₂) are required to produce 13 moles of water (H₂O) if there is excess hydrogen (H₂)?

2H₂ + O₂ --> 2 H₂O

• 6.5 moles O₂

• 26 moles O₂

• 13 moles O₂

• 3.25 moles O₂

How many moles of oxygen (O₂) are required to produce 20 grams of water (H₂O) if there is excess hydrogen (H₂)?

2H₂ + O₂ --> 2 H₂O

• 20.00 moles O₂

• 0.555 moles O₂

• 1.110 moles O₂

• 10.00 moles O₂

How many moles of oxygen (O₂) are required to produce 40 Liters of water (H₂O) if there is excess hydrogen (H₂)?

2H₂ + O₂ --> 2 H₂O

• 40.00 moles O₂

• 1.76 moles O₂

• 0.89 moles O₂

• 3.57 moles O₂

How many moles of oxygen (O₂) are required to produce 60 x 10^25 molecules of water (H₂O) if there is excess hydrogen (H₂)?

2H₂ + O₂ --> 2 H₂O

• 60 moles O₂

• 30 moles O₂

• 296 moles O₂

• 498 moles O₂

How many grams of oxygen (O₂) are required to produce 5 x 10^25 molecules of water (H₂O) if there is excess hydrogen (H₂)?

2H₂ + O₂ --> 2 H₂O

• 1329 grams O₂

• 5 grams O₂

• 42 grams O₂

• 986 grams O₂

How many liters of oxygen (O₂) are required to produce 50 liters of water (H₂O) if there is excess hydrogen (H₂)?

2H₂ + O₂ --> 2 H₂O

• 2 liters O₂

• 25 liters O₂

• 50 liters O₂

• 100 liters O₂

What is the molar mass of H₂O?

• 2.016 grams/mole

• 15.999 grams/mole

• 18.015 grams/mole

• 33.006 grams/mole

What is the molar mass of H₂?

• 1.008 grams/mole

• 2.016 grams/mole

• 3.024 grams/mole

• 4.032 grams/mole