How many moles are in 2.78*10^22 molecules of MgO?

Clouds form when water vapor to form small droplets. a. humidifies b. condenses c. evaporates d. precipitates

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

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution