Question

What is the percent composition of NiO, if a sample of NiO with a mass of 45.7g contains 36.103g Ni and 9.597g O

Answer 1

$w(Ni)=\dfrac{36.103g}{45.7g}*100=79\%$

$w(O)=\dfrac{9.597g }{45.7g }*100=21\%$