1 bwhat is the molar mass of sodium hydroxide,NaOH
a. 38.0g/mole
b. 44 g/mole
c. 23 g/mole
d. 40 g/mole

2 what is the unit of molar mass
a. grams
b. grams/mole
c. mole
d. mole/gram

3 how many moles are in there in 32.3 grams of carbon dioxide,co2
a. 0.73
b. b.32.3
c. 44.01
d. 1421.52

4 what is the molar mass of carbon, c
a. 12.01 g
b. 12.01 g/mole
c. 12 01 mole
d. 12.01 mole/gram

5 2.50 mole of oxygen gas,O2,has the mass
a. 6 g
b. 32 g
c. 40 g
d. 80 g

6 to determine the formula mass of pound you dhould
a. add up the atomic masses of all of all the atomspresent
b. add up the masses of all the atoms present and divide by the number of atoms present
c. add up the atomic numbers of all the atoms present
d. add up the atomic numbers of all the atoms present and divide by the number of atoms present

7 what is theSI unitfor mesurement of number of particles in a substance
a.kilogram
b.mole
c.compare
d.kekvin

8 a mole of a chemical substance represents
a. the mass of the substance that will combine with 12.0 g of carbon
b. the mass of the substance that will combine with 100.0g of oxygen
c. 6.02 x1023 particlesof the substance
d. 6.02 x 10-23 grams of the substnce

9 witch of the following samples contains the greatest number of atoms
a. 1 mole of CO2
b. b.2 moles of HE
c. 3 moles N2O
d. 4 moles CO

10 why is the mole conceptimportant
a.it is useful when converting between grams and atoms or molicules
b.it gives us convenient way to expresslarge numbers
c.it can be applied to any type of particle representivee
d.all of the above