1. Which should weigh more—100 mL of fresh water or 100 mL of fresh sparkling seltzer water? Why? Which should weigh more—100 mL of flat seltzer water at 20°C or the same 100 mL of flat seltzer water...

1. Which should weigh more—100 mL of fresh water or 100 mL of fresh sparkling seltzer water? Why? Which should weigh more—100 mL of flat seltzer water at 20°C or the same 100 mL of flat seltzer water brought to 80°C? Why?

2. The volume of many liquid solvents expands with increasing temperature. What happens to the concentration of a solution made with such a solvent as the temperature of the solution is increased?