How many grams and molecules are present in 1.5 L of H₂ at STP?

• A. 0.13 g H₂
  4.0 × 10²² H₂ molecules
• B. 0.37 g H₂
  5.8 × 10²² H₂ molecules
• C. 0.85 g H₂
  1.3 × 10²³ H₂ molecules
• D. 1.4 g H₂
  5.6 × 10²³ H₂ molecules

Answer: (A)