What is the mass in grams of .000221 mol of carbon?

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Answer 1 · 2018-07-19T18:10:25

#"Mass" = 2.652 xx 10^-3g#

Recall;

#"No of moles" = "Mass"/"Molar Mass"#

Let;

#n = "No of moles"#

#m = "Mass"#

#Mm = "Molar Mass"#

Given;

#n = 0.000221mols#

#m = ?g#

#Mm = 12gmol^-1#

#n = m/(Mm)#

Making #m# the subject formula;

#m = n xx Mm#

Plugging in the values;

#m = 0.000221mols xx 12gmol^-1#

#m = 0.000221cancel(mols) xx 12gcancel(mol^-1)#

#m = 0.000221 xx 12g

#m = 0.002652g#

#m = 2.652 xx 10^-3g#

#:. "Mass" = 2.652 xx 10^-3g#