Joe and Maria tested how the lack of light affected the growth of a plant. Joe and Maria left pot 1 in a sunny place. They put pot 2 under a cardboard box. In all other ways (such as the temperature and the amount of water and fertilizer given), Joe and Maria treated both plants the same. If Joe and Maria wanted to know how the lack of light affects plants, which is the best explanation for why they left pot 1 in the sun?

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