N2O4 is an important component of rocket fuel, at 25°C N2O4 is a colourless gas that partially dissociates into NO2. the colour of an equilibrium mixture of these 2 gasses depends on their relative proportions, which are dependent on temperature. equilibrium is established in the reaction N2O4<=> 2NO2 at 25°C in 3.00L of container and 7.64g of N2O4 and 1.56g of NO2. what is the Kc for this reaction?

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