chemistry
posted by DIANA on .
A 116.9 g sample of nitric acid solution that is 70.0% HNO3 (by mass) contains how many moles of HNO3?
how did you get the answer

Do you go back and look for answers to your posts?
http://www.jiskha.com/display.cgi?id=1323115346 
is the answer 1.29888 moles?

I get 1.29862 which rounds to 1.30 moles to three significant figures (limited by 3 s.f. in 70.0%.