Question

If a 40 g sample of NaCl is composed of 39.34% Sodium, how many grams of

that sample are Sodium?

Answer 1

15.7g

Step-by-step explanation:

mass percent=mass of element/mass of compound *100

39.34=unknown(x)/40g×100

39.34=5x/2

multiplying both sides by 2,we get

5x=78.68

devide by 5 on both sides

x=15.74g Na