Question

what is the mass of
(a) 0.2 mole of oxygen atoms ?
(b) 0.5 mole of water molecules?​

Answer 1

Answer:

A) 16×0.2=3.2g.

B) 18×0.5=9g10.

Answer 2

$\huge\boxed{\fcolorbox{cyan}{green}{3.2}}$

$\huge\boxed{\fcolorbox{cyan}{green}{9.10}}$