Question

Помогите плз 7 класс

Дано:
Ca3 (PO4)2

w (Ca)-?
w (P)-?
w (O)-?

Answer 1

Mr(Ca3(PO4)2)=310

w(3Ca)=120*100%/310=38.7%

w(2P)=62*100/310=20%

100%-20%-38.7%=41.3%O2