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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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lawyer [7]

To Find :

Number of moles of C₃H₆O present in a sample weighing 25.6 grams.

Solution :

Molecular mass of C₃H₆O is :

M = (6×12) + (6×1) + (16×1) grams

M = 94 grams/mol

We know, number of moles of 25.6 grams of C₃H₆O is :

n = \dfrac{Given \ Mass \ Of \ C_3H_6O }{Molar\ Mass \ Of \ C_3H_6O }\\\\n = \dfrac{25.6}{94}\ mole\\\\n = 0.27 \ mole

Hence, this is the required solution.

4 0
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olga55 [171]

Answer:

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2Ag+ + 2H+ +S^2- → Ag2S + H2

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Answer:

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6 0
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