Which of the following is equal to 0.500 mol?
A. 32.0 g O(2)
B. 103.6 g Pb
C. 36.0 g H(2)O
D. 14.0 g CO(2)
help please

B

Explanation:

Think about the molar masses of each.

O2 -> 32 g

So 32 g = 1 mol.

Pb -> 207.2 g

So 103.6 g = .5 mol!

H2O -> 18 g

So 36 g = 2 mol.

CO2 -> 44 g

So 14 g = .3 mol

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