Use the formula: pv=nrt

if p=12, v=22.4, r=.0821 and t=100, then what would n=?

2. how is heavy water different from normal water

What does the mass of 0.7891 mol of ferric oxide (fe2o3)

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?