The graph below shows the effect of temperature on the volume of a gas. Effect of Temperature
on the Volume of a Gas
76
74
72
70
68
Volume (mL)
66
64
62
60
0
0 10 20 30 40 50 60
Temperature (°C)
Which generalization can be made about the relationship between the temperature and volume of a gas?
A As the temperature of a gas decreases, its volume increases
As the temperature of a gas decreases, its volume stays the same
C. As the comperature of a gas increases, its volume increases
D. As the temperature of a gas increases, its volume stays the same

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