Solve the problems. Express your answers to the correct number of significant figures. 2.31/0.790

Explanation:

When you divide two measures, the rule for the number of significant figures of the quotient is to keep the number of significant figures of the measure with least significant figures.

Then, the asnwer must have three significant figures:

Since the figure after 2.92 is less than five, you just drop it.

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