CHEM 18.1 DepEx 1

Question 1

quantity of a substance that contains the same number of ultimate particles

Answer 1

mole

Question 2

what are the 3 particles

Answer 2

atoms, molecules, and ions

Question 3

a technique in precisely counting the atoms

Answer 3

Avogadro’s number

Question 4

1 mole of C atoms = _____ = 6.02x10^23 C atoms

Answer 4

12.01g

Question 5

1 mole of C atoms = 12.01 g = _______-

Answer 5

6.02x10^23 C atoms

Question 6

does a mole of F and a mole of O contains the same 6.02x10^23?

Answer 6

Yes

Question 7

quantity of mass per mole (g/mol)

Answer 7

molar mass

Question 8

atomic mass is expressed in ______

Answer 8

amu

Question 9

molar mass is expressed in _____

Answer 9

g/mol

Question 10

one mole of a substance has the same numerical value for its mass expressed in _____ as that of the mass of one atom expressed in _____

Answer 10

grams ; atomic units

Question 11

1 mole = 1 g = ___

Answer 11

1 amu

Question 12

_____ = 1g = 1 amu

Answer 12

1 mole

Question 13

1 mole = ___ = 1 amu

Answer 13

1g

Question 14

a mole of H2O =

Answer 14

6.02 x 10^23 molecules H2O

Question 15

does a 6.02 x 10^23 molecules of H20 equal to a mole of H2O?

Answer 15

Yes

Question 16

most widely used expression for concentration

Answer 16

Molarity

Question 17

it is the procedure for preparing a less concentrated solution from a more concentrated one.

Answer 17

Dilution

Question 18

Solutions of lower concentrations in Dilution can be obtained by the addition of _________-

Answer 18

water