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mart [117]
1 year ago
11

Mercury-197 has a half-life of 3 days. Starting

Chemistry
1 answer:
Ahat [919]1 year ago
4 0

Answer:

2.34 gms left

Explanation:

3 weeks = 21 days   =    7 half lives

300 * (1/2)^7 = 2.34 gms

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In how many grams of water should 25.31 g of potassium nitrate (kno3) be dissolved to prepare a 0.1982 m solution?
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Solution:

Molality:-It is a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent

Therefore,  

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This is the required answer.

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