When copper ii sulphate solution is formed why is it crystallised instead of evaporated

What is the temperature of one mole of helium gas at stp?

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?