Question

Помогите Пж

Mr (C₂H₅) = ?
Mr (K₂ Co₃) = ?
Mr (Al) (CH) = ?

Answer 1

Mr (C₂H₅) = 12*2+1*5=29

Mr (K₂ Co₃) = 40+12+16*3=100

Mr (Al) (CH) = 27+12+1=40

Answer 2

Спасибо.