24.95 + 11.83 = __________
34.67
36.78
37.87
38.67
1 24.95+ 11.83––––––––– 36.78–––––––
495 ÷ 24.95 ×? = 300
1979 ÷ 24.95 ×5.02 = ?
The heat evolved during the formation of 24.95 grams of hydrated copper sulphate from anhydrouscopper sulphate (mol.wt=159.5) is :
CuSO4+5H2O→CuSO4.5H2O ΔH=−78.2KJ
The total weight of 1022 molecular units of CuSO45H2O is nearly
The total mass of 1022 molecular units of CuSO4.5H2O is nearly