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oee [108]
3 years ago
9

How much water must be added to 15 ml of a 2.5 M solution of sodium chloride to make a 2.0 M solution of sodium chloride?

Chemistry
1 answer:
Ivan3 years ago
3 0

Answer:

3.75mL need to be added

Explanation:

M1 x V1 = M2 x V2

so V2=(M1xV1)/M2

(2.5Mx.015L)/2M= .01875L or 18.75ml

since we want to know how much needs to be added we subtract 18.75 from 15

Giving us 3.75ml need to be added

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Lt takes 4 hr 39 min for a 2.00-mg sample of radium-230 to decay to 0.25 mg. what is the half-life of radium-230?
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