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Rufina [12.5K]
3 years ago
15

294 g of potassium dichromate contains 52 g of chromium and 39 g of potassium. What is the mass percent of oxygen in the compoun

d?
Chemistry
2 answers:
oee [108]3 years ago
7 0

The answer is 69.048%.


Mass of potassium dichromate (K₂Cr₂O₇) is 294 g, which is a 100%.


Given mass of chromium is 52 g. So, the mass percent of chromium in the compound is 17.687%:

52 g : x% = 294 g : 100%

x = 52 ÷ 294 × 100 %

x = 17.687%


Given mass of potassium is 39 g. So, the mass percent of potassium in the compound is 13.265%:

39 g : x% = 294 g : 100%

x = 39 ÷ 294 × 100 %

x = 13.265%


Therefore, the mass percent of oxygen in the compound is 69.048%:

100% - 17.687% - 13.265% = 69.048%.

IgorLugansk [536]3 years ago
3 0
69.047% is the answer to this question
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