The gas phase decomposition of phosphine at 120 °c ph3(g) 1/4 p4(g) + 3/2 h2(g) is first order in ph3 with a rate constant of 1.80×10-2 s-1. if the initial concentration of ph3 is 3.16×10-2 m, the concentration of ph3 will be m after 99 s have passed

answerlinnaeus;

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