Which has a greater volume, 10 grams of water or 10 grams of acetone?

Density is defined as the ratio of mass to the volume.

Density =          (1)

Mass of water = 10 grams

Mass of acetone  = 10 grams

Density of water  = 1

Density of acetone  = 0.7857

Put the value of density of water and its mass in equation (1)

1 =  

Volume of water =  10

Put the value of density of acetone and its mass in equation (1)

0.7857 =  

Volume of acetone = 12.72

Thus, volume of acetone is more than volume of water because the density of acetone is lower.

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