Unit 6: The Mole

converting atoms to moles

100

convert 1.20x 10²⁴ atoms of carbon to moles

1.99 mol C

200

convert 3.01x 10²⁴ atoms of oxygen to moles

0.500 mol O

300

convert 9.03 x 10²⁴ atoms of sodium to moles

15.0 mol na

400

convert 4.82 x 10²⁵ atoms of aluminum to moles

80.0 mol Al

500

Convert 7.53 x 10 ²² atoms of helium to moles

0.125 He

molar mass

100

What is the molar mass of Na2CO₃

105.99g/m Na₂CO₃

200

What is the molar mass of H₂O?

18.02 g/m H₂O

300

what is the molar mass of Na₂Cl?

81.43 g/mol Na₂Cl

400

what is the molar mass of CaCO₃?

100.9g/molCaCO₃

500

what is the molar mass of Al₂(SO₄)₃?

342.15g/mol Al₂(SO₄)₃

converting moles to mass

100

convert 2.50 moles of H₂O to grams

45.05 H₂O

200

convert 0.75 moles of CO₂ to grams

33.01 g CO₂

300

convert 4.00 moles of NaCl to grams

233.76 g Nacl

400

convert 1.20 moles of NH₃ to grams

20.45g NH₃

500

convert 3.50 moles of CaCO₃ to grams

350.32 g CaCO₃

percent composition

100

find the percent comp of H₂O

H=11.21% 0=88.79%

200

find the percent composition of CO₂

c= 27.29% 0=72.71

300

find the percent composition of NaCl

Na=39.34% Cl=60.66%

400

find the percent composition of NH₃

N=82.22% H=17.78%

500

find the percent composition of CaCO₃

Ca=40.04% C=12.00% O=47.96%