Stoichiometry: Show all work for the following problems. Equation: C3H8 + 5O2 3CO2 + 4H2O
If 30.0 grams of oxygen are used, how many grams of water will form?
If 100.0 grams of C3H8 burns, how many grams of carbon dioxide will form?

c is the answer because when something is left after something evaporates that shows the chemical change.

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