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ser-zykov [4K]
2 years ago
6

How much Cu-61 (half-life about 3 hours) would remain from a 2 mg sample after 9 hours?​

Chemistry
1 answer:
vivado [14]2 years ago
3 0

Answer: 0.25mg

Explanation:

Just took the quiz

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What is the change in boiling point for a 0.615m solution of Mgl2 in water?
ivanzaharov [21]

Answer :  The change in boiling point is, 0.94^oC

Explanation :

Formula used :

\Delta T_b=i\times K_f\times m

where,

\Delta T_b = change in boiling point = ?

i = Van't Hoff factor = 3 (for MgI₂ electrolyte)

K_f = boiling point constant for water = 0.51^oC/m

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Now put all the given values in this formula, we get

\Delta T_b=3\times (0.51^oC/m)\times 0.615m

\Delta T_b=0.94^oC

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