calculating mass/volume at STP
1) What is the mass of 75.0 L of methane gas (CH₄) measured at STP?
2) What volume, in liters, will be occupied by 48.8 g of helium gas at STP?
3) What volume, in liters, at STP, is occupied by 3.30 X 10²³ molecules of oxygen gas?
4) What is the mass of 3.01 x 10²² molecules of carbon dioxide at STP?