Question

if 2 molecules of calcium carbonate us required then how many grams of it should be taken​

Answer 1

Explanation:

The formula to find out the weight of substance is,

Weight of substance (gm) = Number of moles × Molar Mass.

(i) For sodium chloride:-

Weight of sodium chloride = Number of moles × molar mass.

                                            = 0.2 × 58.44

                                             = 11.69 grams.

(ii) For Magnesium Oxide:

Weight of magnesium oxide = Number of moles × Molar mass.

                                               = 0.2 × 40.3

                                               = 8.06 grams.

(iii) For calcium carbonate:

Weight of calcium carbonate = Number of moles × Molar Mass.

                                                = 0.2 × 100.087

                                                = 20.02 grams.