A scientist usually runs a(n)__ to see the effect the independant varible has on

test or trial

Explanation:

When somone is doing an expirement they usually conduct tests to see if their hypothesis was valid. They could so small trials like this,

Example:

Problem: Can people taste the difference between Coca Cola and Pepsi?

Trials:

1. Yes

2. Yes

3. No

4. Yes

5. Yes

6. No

7. No

8. Yes

9. Yes

10. Yes

Based on the majority, the solution to our problem is yes, most people can taste the difference between Coca Cola and Pepsi.

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