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balandron [24]
3 years ago
8

A chemical reaction that ______ energy can be used to heat up other substances.

Chemistry
1 answer:
Luba_88 [7]3 years ago
4 0

Answer: Release

Explanation:

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When a saturated solution of NH4Br dissolved in 100 grams of water is cooled from 60°C to 30°C, how much NH4Br will precipitate?
stepladder [879]

Answer:

m_{precipitated}=24.8g

Explanation:

Hello,

In this case, since at 60 °C, 108 grams of ammonium bromide are completely dissolved in 100 grams of water for a saturated solution, once it is cooled to 30 °C, wherein only 83.2 grams are completely dissolved in 100 grams of water, the following mass will precipitate:

m_{precipitated}=108g-83.2g\\\\m_{precipitated}=24.8g

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b, H2O(s) r H2O(g)

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