What mass of water is produced when 18 g of hydrogen reacts with excess oxygen?

• 36 g

• 162 g

• 324 g

• 180 g

How many grams of CO₂ are produced from the complete combustion of 44 g of propane (C₃H₈)?

• 132 g

• 88 g

• 44 g

• 176 g

If 32 g of methane reacts with oxygen, what mass of water is formed?

• 72 g

• 64 g

• 36 g

• 18 g

What mass of NaCl is formed when 58.5 g of Na reacts with excess Cl₂?

• 117 g

• 58.5 g

• 29.25 g

• 146.25 g

How many grams of Fe₂O₃ are produced when 112 g of iron reacts with oxygen?

• 160 g

• 112 g

• 80 g

• 200 g

How many molecules are in 18 g of water?

• 6.02 × 10²³

• 3.01 × 10²³

• 1.20 × 10²⁴

• 9.03 × 10²³

How many atoms are in 12 g of carbon?

• 6.02 × 10²³

• 3.01 × 10²³

• 1.20 × 10²⁴

• 9.03 × 10²³

How many molecules are in 44 g of CO₂?

• 6.02 × 10²³

• 1.20 × 10²⁴

• 3.01 × 10²³

• 2.20 × 10²⁴

How many atoms are in 2 g of hydrogen gas (H₂)?

• 6.02 × 10²³

• 1.20 × 10²⁴

• 3.01 × 10²³

• 2.20 × 10²⁴

How many molecules are in 28 g of nitrogen gas (N₂)?

• 6.02 × 10²³

• 1.20 × 10²⁴

• 3.01 × 10²³

• 2.20 × 10²⁴