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OLEGan [10]
3 years ago
13

I will mark brainlist please help

Chemistry
1 answer:
tankabanditka [31]3 years ago
3 0

Answer:

0.26 moles........................

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Answer:

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Explanation:

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Which of the following elements does NOT form a diatomic molecule?
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4 years ago
1. A calorimeter contains 143 g of water at 22.5°C. A 12 g sample of NaCl is added to the water in the calorimeter. After the so
klio [65]

Answer:

Enthalpy of solution is 583.67 J

Explanation:

The mass of water is 143 g

The mass of NaCl added = 12g

Total mass of solution will be = massofwater+massofNaCl=143+12=155g

The specific heat of solution = specific heat of water = 4.184 J /g °C

The initial temperature = 22.5°C

Final temperature =21.6°

The change in temperature = Initial-Final=22.5^{0}-21.6^{0}=0.9^{0}

The enthalpy of solution will be equal to the heat change in the solution.

The heat change of solution will be calculated as:

Heat=massofsolutionXspecificheatXchangeintemperature

Heat=155x4.184X0.9=583.67J

Thus the enthalpy of solution is 583.67 J (Endothermic reaction)

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