When the pressure and number of particles of a gas are constant, which of the following is also constant? a. the sum of the volume and temperature in kelvin b. the difference of the volume and temperature in kelvin c. the product of the volume and temperature in kelvin d. the ratio of the temperature to volume in kelvin

chemistry exam final

Explanation:

1.a

2.a

3.b

4.a

5.c

6.c

7.d

thats all i have so far

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