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3 years ago

Calculate the mass of calcium carbide produced if 1770 kJ of heat is absorbed.

Chemistry

1 answer:

Flauer [41]3 years ago

7 0

Answer:

$m=243.72g$

Explanation:

Hello,

For the given chemical reaction:

$CaO(s) + 3 C(s) \rightarrow CaC_2(s) + CO(g)$

Whose heat of reaction is 464.8 kJ/mol which means that energy is absorbed due to the chemical reaction, we can compute the moles of calcium carbide via the following relationship:

$n=\frac{1770kJ}{464.8 kJ/mol}\\ \\n=3.81mol$

Then, since the molar mass of calcium carbide is 64 g/mol, the yielded mass turns out:

$m=3.81mol*\frac{64g}{1mol}\\ \\m=243.72g$

Best regards.

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QED!!

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3 years ago

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Answer:

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1. An atom of an elephant has atomic mass of 39 and has number of neutrons as 20 calculate protons number.

r-ruslan [8.4K]

Answer:

See Explanation

Explanation:

1) Let us recall that;

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3 years ago