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Len [333]
3 years ago
11

A sample of a compound made entirely from copper and oxygen was found to have a total mass of 0.1431g The mass of the copper In

the compound was found to be 0.1271g. Calculate the number of moles of copper in the sample.
Chemistry
1 answer:
Ket [755]3 years ago
5 0
Number of moles of Cu in 63.546 g is 1 mole

1 / 63.546 = 0.0157366317

Number of moles in 1 g of Cu is 0.0157366317

0.0157366317 x 0.1431

0.002251912 moles will be the answer
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Answer : The masses of calcium chloride and water used were, 352.6 g and 487.0 g.

Explanation :

As we are given that 42.0 % calcium chloride by mass that means 42.0 grams of calcium chloride present in 100 grams of solution.

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Now we have to determine the mass of calcium chloride for 839.6 grams of solution.

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