Apuddle of water on the porch disappears after a few days. which statement justifies this phenomenon?
water loses energy to the atmosphere and is converted to steam.
water loses energy and freezes to ice, which is transparent.
water gains energy from sunlight and is converted to vapor.
water gains energy from sunlight and freezes to ice.
water loses energy causing the water molecules to shrink and disappear.
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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