After recording the data for five repeated trials you should calculate the average of five values and report that average in your lab report

The statement given is true.

Explanation:

When we conduct an experiment we have to record the outcomes and maintain a log so that we can know number for later purposes, where the experiment is going and what conclusions we can expect.

To get the final answer or number the five outcomes that have been recorded here have to be averaged to get one value, this value would show  where the outcome’s value will lie.

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