Question

How many atoms of hydrogen are present in 10g of methane?

Answer 1

`atoms\ H=1.50x10^(24)`

Step-by-step explanation:

Hello!

In this case, since the molecular formula of methane is CH₄, can compute the moles of methane in 10 g first:

`n_(CH_4)=10gCH_4*(1molCH_4)/(16.05gCH_4) =0.623molCH_4`

Now, since 1 mol of methane contains 4 mol of hydrogen atoms, and 1 mol of any atom contains 6.022x10²³ atoms via the Avogadro's number, we obtain the following number atoms of hydrogen:

`atoms \ H=0.623molCH_4*(4molH)/(1molCH_4)*(6.022x10^(23)atoms\ H)/(1molH)\\\\atoms\ H=1.50x10^(24)`

Best regards!