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The mass of an empty crucible was 17.556g. The mass of the crucible and a hydrate was 21.018 g. The mass of the crucible and anhydrous salt (after heating) was 19.641g. A. Calculate the mass of water lost due to heating. B. Calculate the mass percentage of water.

Sagot :

Polyblock

Answer:

A. 1.377 g

B. 16.5%

Explanation:

To find the water loss, subtract the salt and crucible mass from the hydrate and crucible mass

21.018 - 19.641 = 1.377

To find the water mass percentage, divide the empty crucible mass by the mass of the hydrate and crucible. Then, subtract that number from 1.

17.556 ÷ 21.018 = 0.835284

1 - 0.835284 = 0.164716

If you want to add an extra step, multiply this number by 100 to get the percentage.

0.164716 x 100 = 16.4716

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