Cold vaporizers pass a current through water, evaporating it with only a small increase in temperature. One such home device is rated at 2.50 A and utilizes 120 V AC with 94.0% efficiency. a) What is the vaporization rate in grams per minute? (You do not need to enter any units.) b) How much water (in volume) must you put into the vaporizer for 8.00 h of overnight operation?