A 53.6 g sample of iron metal is heated and put into 102.6 g of water at 16.3ºC in a calorimeter. If the final temperature of the iron sample and the water is 29.8ºC. What is the initial temperature of the iron sample when it was placed in the water? The specific heat of iron is 0.449 J/gºC.

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explanation:

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