Explain why liquid particles at high pressure would need more energy to change to a gas than liquid particles at low pressure. (7th grade science)

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.