Anyone good with chemistry 1? i need some with a few questions. : ))

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

In order to calculate the amount of heat transferred you must know the __ and specific heat of the material, as well as the change in temperature. a. volume b. density c. mass d. enthalpy

What is the temperature of 0.750 mol of a gas stored in a 6,850 ml cylinder at 2.21 atm? . 2.95 k 5.24 k 138 k 246 k