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3 years ago

PLS HELP - How many moles are present in 3.01 x 1023 atoms of N2 (nitrogen gas) ?

Chemistry

1 answer:

Neporo4naja [7]3 years ago

6 0

Answer:

<h2>0.5 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{3.01 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{3.01}{6.02} = 0.5 \\$

We have the final answer as

<h3>0.5 moles </h3>

Hope this helps you

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2 years ago

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Solution in b.:

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$\displaystyle V = \frac{n}{c} = \frac{0.0045\; \rm mol}{3.4\; \rm mol \cdot L^{-1}} \approx 0.0013\; \rm L$ .

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