Answer to Question #67865 in General Chemistry for kid

Question

each copper ii sulfate unit is associated with five water molecules in crystalline copper sulfate pentahydrate (CuSO4 5H2O) when this compound is heated in the air above 100C it loses the water molecules and also its blue color CuSO4 * 5H20 CuSO4 + 5H2O

Answer 1

CuSO 4 x 5H 2 O -> CuSO 4 + 5H 2 O

M (CuSO 4 x 5H 2 O) = 248.68 g/mol

15.01 g x (1 mol/248.68 g) = 0.060 mol of CuSO 4 x 5H 2 O

0.06 x 5 = 0.3 mol of H 2 O

Answer:

n (H 2 O) = 0.3 mol