Question

What mass of copper is used to produce 2.87 moles of copper (II) oxide?

The answer is 182 but I don't know why

Answer 1

182.532 [gr.].

Step-by-step explanation:

1) equation of this reaction is:

2Cu+O₂⇒2CuO;

2) according to the equation made up above, ν(CuO)=ν(Cu); it means ν(Cu)=2.87 (mol.), then

3) m(Cu)=ν(Cu)*M(Cu);

m(Cu)=2.87*63.6=182.532 [gr].