Current location - Quotes Website - Famous sayings - Junior high school chemistry: A mixture of carbon and copper enhances heat in the air
Junior high school chemistry: A mixture of carbon and copper enhances heat in the air

2Cu+O2=2CuO

C+O2=CO2

The mass of the remaining solid is the mass of the original mixture, so the mass of carbon in the original mixture is equal to the reaction The mass of oxygen in the remaining solid after the operation

The mass ratio of carbon and copper in the original mixture is 16:64=1:4

The mass fraction of carbon in the original mixture is 16/80*100 %=20%.