Can I talk to someone that is nice that is female I want to do something for my gf but I don’t know what to do

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

What is the molar mass of potassium nitrate, kno3

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?