moles of gas UB Forum › Category: Mastering Chemistry › moles of gas 1 Vote Up Vote Down Bailey Brown Staff asked 7 years ago How many moles of gas are there in a 45.0 L container at 25.0 °C and 500.0 mm Hg? A) 0.630 B) 6.11 C) 18.4 D) 1.21 E) 207 1 Answers 1 Vote Up Vote Down Best Answer Selena Tate Staff answered 7 years ago How many moles of gas are there in a 45.0 L container at 25.0 °C and 500.0 mm Hg? Solution: 1.21