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-. How many moles of Pb are contained in 2.49 x 1025 atoms Pb?

Sagot :

Answer: There are [tex]4.13 \times 10^{-3}[/tex] moles of Pb are contained in [tex]2.49 \times 10^{25}[/tex] atoms Pb.

Explanation:

According to the mole concept, 1 mole of every substance contains [tex]6.023 \times 10^{23}[/tex] atoms.

Hence, number of moles present in [tex]2.49 \times 10^{25}[/tex] atoms of Pb are as follows.

[tex]No. of moles = \frac{2.49 \times 10^{25}}{6.023 \times 10^{23}}\\= 4.13 \times 10^{-3} mol[/tex]

Thus, we can conclude that there are [tex]4.13 \times 10^{-3}[/tex] moles of Pb are contained in [tex]2.49 \times 10^{25}[/tex] atoms Pb.

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