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iris [78.8K]
3 years ago
10

How many half-lives have passed when there are 3 times as much daughter isotope as parent isotope?

Chemistry
1 answer:
Citrus2011 [14]3 years ago
3 0

Answer:

2 half lives.

Explanation:

Suppose there are 100g of parent isotope at the start.

After 1 half-life  there will be 50g of parent and 50g of daughter isotope.

After another half life there is  25 g of parent and 75g of daughter isotope.

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A sample of gas contains 0.1700 mol of OF2(g) and 0.1700 mol of H2O(g) and occupies a volume of 19.5 L. The following reaction t
andreev551 [17]

Answer: The volume of the sample after the reaction takes place is 29.25 L.

Explanation:

The given reaction equation is as follows.

OF_{2}(g) + H_{2}O(g) \rightarrow O_{2}(g) + 2HF(g)

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Hence, the given data is as follows.

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Substitute the values into above formula as follows.

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8 0
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3 0
1 year ago
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n =  M * V

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n = 0.0075 moles of CuCl2

hope this helps!.

3 0
3 years ago
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