The total number of atoms in 3.1 gram P4 is (P=31)?

1 Answer
Nam D.
Apr 20, 2018

#~~1.51*10^22# atoms

Explanation:

Phosphorus has a molar mass of #30.973762 \ "g/mol"#. So, #P_4# would have a molar mass of #4*30.973762~~123.9 \ "g/mol"#. And so here, we would have:

#(3.1color(red)cancelcolor(black)"g")/(123.9color(red)cancelcolor(black)"g""/mol")~~2.5*10^-2 \ "mol"#

Therefore, the total number of atoms will be:

#2.5*10^-2color(red)cancelcolor(black)"mol"*(6.02*10^23 \ "atoms")/(color(red)cancelcolor(black)"mol")~~1.51*10^22 \ "atoms"#

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