Formula mass of sodium carbonate
= (2 x atomic mass of Na) + (1 x atomic mass of C) + (3 x atomic mass of O) + 10 [(2 x atomic mass of H) + (1 x atomic mass of O)]
= 2 x 23 + 1 x 12 + 3 x 16 + 10 [(2 x 1) + (1 x 16)]
= 46 + 12 + 48 + 180
= 286 u
Formula mass of sodium carbonate
= (2 x atomic mass of Na) + (1 x atomic mass of C) + (3 x atomic mass of O) + 10 [(2 x atomic mass of H) + (1 x atomic mass of O)]
= 2 x 23 + 1 x 12 + 3 x 16 + 10 [(2 x 1) + (1 x 16)]
= 46 + 12 + 48 + 180
= 286 u
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Mass of Sample | Mass of carbon | Mass of Hydrogen | |
Sample 1 | 1.0 g | 0.862 g | 0.138 g |
Sample 2 | 1.549 g | 1.335 g | 0.214 g |
Sample 3 | 0.988 g | 0.852 g | 0.136 g |