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adelina 88 [10]
3 years ago
11

Nitrogen has a half life of 10 days. If you have a 75 gram sample how much is remaining after 20 days ?​

Chemistry
1 answer:
CaHeK987 [17]3 years ago
3 0
There is 9.375 g of nitrogen. This is because when a half-life passes, the mass becomes 2 times less. Since two half-lives have passed, you need to divide by 4.
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<u>Answer:</u>

<u>For 1:</u> The correct answer is Option A.

<u>For 2:</u> The correct answer is Option B.

<u>For 3:</u> The correct answer is Option C.

<u>Explanation:</u>

<u>For 1:</u>

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Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.

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  • <u>For 2:</u>

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X = Symbol of the atom

We are given:

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  • <u>For 3:</u>

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