10 g of copper is heated and the mass increases to 12.5 g. What is the mass of the copper in the new substances? show with steps

10 g

Explanation:

The heating of copper can be represented by the following equation:

Cu + 1/2O2 > CuO

The new substance is copper oxide, CuO.

From the law of conservation of matter which says that matter can neither be created nor destroyed but be converted from one form to another, it means that barring any loss during heating, all the Cu should be converted to CuO. Hence, the amount of copper in the new substance should remain 10 g.

level 4 to level 2 : ))