Aman says that he has gained weight and can no longer fit into some of his clothes.
instead of exercising, he claims that he needs to go to the moon. he reasons that
he will weigh less there and thus fit into his clothes again. aside from the fact that it
is impractical to travel to the moon, what is wrong with the man's argument? be
sure to define mass and weight in your response.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

the dissolution of polymer can be thermodynamically described in 2 steps.

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