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Mashcka [7]
3 years ago
6

Determine a massa de um átomo de carbono12 em gramas

Chemistry
2 answers:
Anon25 [30]3 years ago
7 0

The mass of an atom of carbon-12 is 1.993 × 10⁻²³ g.

1 C atom has a mass of 12 u.

1 mol of C atoms has a mass of 12 g.

∴ Mass of 1 C atom = 12 g/6.022 × 10²³ C atoms = 1.993 × 10⁻²³ g

lapo4ka [179]3 years ago
3 0
I believe it would be 1.660539040 × 10−24 gram.
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Answer:

The balanced equation is:

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From the equation, we can see that we need twice the moles of HNO3 than the moles of Mg

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Hence, 2(moles of Mg) = 0.36 moles of HNO3 will be consumed

Number of moles of HNO3 after the reaction is finished is the number of unreacted moles of HNO3

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