A large coolers filled with water as shown below how does the valve on the cooler compare with the switch in an electric circuit

What is the mass of 0.46 mol of mgcl2

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

If two objects at different te,peraure are in contact with each other what happens to their temperature