The equation shows the decomposition of hydrogen peroxide. Calculate the overall energy change for the reaction
2 H-0-0-H → 2 H-O-H + O=0
Bond
0-0
0=0
O-H
Bond dissociation
energy in kJ per mole
138
496
463

the ratio of the conjugate base to the acid required to attain the desired ph.

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