chp 10 test

Question 1

mole

Answer 1

the amount of a substance that contains 6.022x10^23 particles

Question 2

list the three conversion factors used in this chapter

Answer 2

molar mass
molar volume
avogadro’s number

Question 3

how do a mole of silver and a mole of zinc compare?

Answer 3

they contain the same amount of atoms (6.022x10^23 atoms)

Question 4

how are a mole of silver and a mole of zinc different?

Answer 4

they have different masses (Ag = 107.87 g, Zn = 65.39 g)

Question 5

1 mole of NO2 contains how many molecules?

Answer 5

6.022x10^23

Question 6

1 mole of NO2 contains how many atoms of nitrogen?

Answer 6

6.022x10^23 atoms N

Question 7

1 mole of NO2 contains how many atoms of oxygen?

Answer 7

1.20x10^24 atoms O

Question 8

formula mass

Answer 8

the mass, in amu, of one particle of a substance

Question 9

molar mass

Answer 9

the mass, in g, of one mole of a substance

Question 10

how does formula mass compare to molar mass?

Answer 10

formula and molar mass are the same number, but formula mass is in amy and molar mass is in g