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Anna11 [10]
3 years ago
15

What is the percent by mass of oxygen in ca(oh)2? [formula mass = 74.1]

Chemistry
2 answers:
andre [41]3 years ago
8 0
16(2)/74.1=.431

.431x100= 43.1%
finlep [7]3 years ago
8 0

Answer:

43.18%

Explanation:

To calculate the percentage by mass of oxygen in the compound, multiply the atomic mass of oxygen by two. This is done because the compound contains two moles of oxygen.

16*2=32

32 divided by the formula mass as given in the question multiplied by 100 gives 43.18%

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