posted by Natash .
How many oxygen atoms are in 1.90g og quartz (SiO2)?
ok so 1.90g SiO2(1mol/60.0843g SiO2)(2 O mols/1 mol SiO2) (6.022*10^23atoms/1mol) what am i doing wrongg???
It looks ok to me. Perhaps you just punched it in the calculator wrong. My calculator says 3.76E22 but check that.