Type one to two paragraphs that describe your models and relate them to the law of
conservation of mass. Your document should:
identify the names of the reactants and products in the reaction.
identify the number of molecules that make up the reactants and products.
identify the type and number of atoms in each molecule of the reactants and products.
explain what happens during the chemical reaction.
explain how mass is conserved during the chemical reaction.

answeridentity;

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o