In an experiment 1 288g of copper oxide was obtained from 1 03g of copper In another experiment 3 - Science - Atoms and Molecules

Question

In an experiment 1 288g of copper oxide was obtained from 1 03g
of copper In another experiment 3 672g of copper oxide obtain from
the 2 938g of copper Show that these figures verify the law of
constant proportion

Shukla Paladhi · Accepted Answer

Dear Student,
First experiment
Copper oxide = 1 288 g
Copper left = 1 03 g
Oxygen present = 1 288 - 1 03 = 0 258 g
Percentage of oxygen in CuO = (0 258 × 100) / 1 288 = 19
98 ~ 20 %
Second experiment
Copper oxide = 3 672 g
Copper left = 2 938 g
Oxygen present = 3 672 - 2 938 = 0 734 g
Percentage of oxygen in CuO = (0 734 × 100) / 3 672 = 20
03 ~ 20 %
So, it is verified that these figures verify the law of constant
proportion
Best wishes!

In an experiment 1.288g of copper oxide was obtained from 1.03g of copper. In another experiment 3.672g of copper oxide obtain from the 2.938g of copper. Show that these figures verify the law of constant proportion.