How many moles of #CH_4# contain #1.5 * 10^23# particles?

1 Answer
Meave60
Dec 31, 2015

#"0.25 mol CH"_4"#

Explanation:

The particles of #"CH"_4# are molecules.

#1"mol CH"_4=6.022xx10^23"molecules CH"_4"#

To determine the moles of #"CH"_4"#, divide the given number of molecules by #6.022xx10^23# molecules/mol.

#1.5xx10^23cancel"molecules CH"_4xx(1"mol CH"_4)/(6.022xx10^23cancel"molecules CH"_4)="0.25 mol CH"_4"# (rounded to two significant figures)

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