Silver bromide is used to coat ordinary black-and-white photographic film, while high-speed film uses silver iodide. (a) when 50.0 ml of 5.0 g/l agno3 is added to a coffee-cup calorimeter containing 50.0 ml of 5.0 g/l nal, with both solutions at 25∘c what mass of agl forms? (b) find δh∘rxn (c) what is δ tsoln (assume the volumes are additive and the solution has the density and specific heat capacity of water)?

elements make up everything, and they combine to make compounds.

the answer is c

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