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Likurg_2 [28]
3 years ago
10

How many moles of methane (CH4) are in 7.31 x 10^25 molecules

Chemistry
2 answers:
Ivan3 years ago
6 0

molar mass of methane CH4

= C + 4 H  

= 12.0 + 4 x 1.008

= 12.0 +  4.032

= 16.042g/mol

7.31 x 10^25 molecules x <u>             1 mole  CH4    </u>  = 121.43 moles

                                       6.02 x 10^23 CH4 molecules

121.43 moles CH4 are present.

       


Alex73 [517]3 years ago
6 0

Answer : The number of moles of methane are, 121.39 moles

Explanation : Given,

Number of molecules of methane gas = 7.31\times 10^{25}

Now we have to calculate the number of moles of methane gas.

As, 6.022\times 10^{23} number of molecules of methane present in 1 mole of methane gas.

So, 7.31\times 10^{25} number of molecules of methane present in \frac{7.31\times 10^{25}}{6.022\times 10^{23}}\times 1mole=121.39 moles of methane gas.

Therefore, the number of moles of methane are, 121.39 moles

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