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Anettt [7]
3 years ago
7

Determine the mass of a billion gold (u) atoms

Chemistry
1 answer:
Dennis_Churaev [7]3 years ago
5 0
Therefore, 1 mole<span> of gold weighs </span>196.9665<span> grams. So, in 2.8 grams of gold we would have:</span>
(2.8 gram)(1 mole/196.9665<span> gram) = 0.0142 mole.</span>
From Avogadro's number, we know that there are approximately 6.02 x 1023<span>atoms/mole.</span>
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Answer:

Correct option is

B

5 liters of CH

4

(g)NO

2

at STP

No. of molecules=

22.4

5

mol=

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5

×N

A

molecules

A) 5ℊ of H

2

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No. of moles=

2

5

mol=

2

5

×N

A

molecules

B) 5l of CH

4

(g)

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4

=

22.4

5

mol=

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5

N

A

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A

O

2

molecules

D) 5×10

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(g)

Molecules of 5l NO

2

(g) at STP=5l of CH

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(g) molecules at STP

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