How many particles would one formula unit of MgBr2 produce when dissolved in solution?

In 2002, the rare earth elements mine in mountain pass, california was closed because

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

Match each statement with the state of matter it describes