If a pure aluminum pan that has a specific heat of 0.21cal / g and a Heat of Fusion of 94.5cal/g and is at room temperature 21 degrees * C . The melting point of aluminum is 660 degrees * C . How big is the pan if it takes 54,400.5cal to melt the entire pan?

catya your not at all which answer i've seen you do this on another question!

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