What is the percent by mass of sodium in Na2SO4?

Question

Farrell

Chemistry

18 August, 12:16

What is the percent by mass of sodium in Na2SO4?

+4

Answers (1)

Know the Answer?

Victor Lee · Answer 1

32.37%; that is done with sig figs as well. What you want to do is find the molar mass of the entire substance (142.05g/mol) and the mass of the sodium (45.98g). Divide 45.98/142.05. You get. 3236888 ... Which when rounded for sig figs is. 3237, which is of course 32.37%.