How many moles of methane(CH4) are in 7.31x1025 molecules?
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In scientific notation!!!

121.428 mol = 1.214 * 10^2 mol

Explanation:

1 mol = 6.02 * 10^23 molecules

x  = 7.31 * 10^25  molecules

7.31*10^25 = 6.02*10^23   x

Divide by 6.02*10^23

7.31 * 10^25 / 6.02*10^23 = x

x = 121.428 mol

The units are mol

electron microscopy and scanning tunneling microscopes gives us a greater understanding of atoms by being able to see the atom itself, and lets us see some atomic reactions.

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