1. How many grams of hydrogen are needed to produce 3.6 g of water according to this equation? 2H2 + O2 -4 2H2O
2. How many moles of neon occupy a volume of 12.8 L at STP?
3. A sample of argon at 30.°C and 5.0 atm pressure is cooled in the same container to a temperature of 0.00°C. What is the new pressure?