The atomic number is the number of an atom

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water

What is true of composite volcanoes?