2. Which determines the identity of an element? TEKS 8.518) readiness
A. its mass number
B. the charge of the atom
C. the number of its neutrons
D. the number of its protons

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)

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?

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate