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- 1. Multiple ChoiceHow many atoms of iodine are in a mole of iodine?5363.55g126.96.02 x 1023
- 2. Multiple ChoiceWhat is the Molar mass of one mole of Iron (Fe)?55.93 amu55.93 g111.86 amu111.86 g
- 3. Multiple ChoiceCalculating percent composition determines the ___________ of each atom in a compoundpercent by masspercent by volumepercent by number
- 4. Multiple ChoiceWhere do you look to calculate the molar mass?avogadros numberperiodic table
- 5. Multiple ChoiceWhat is the molar mass of Carbon Dioxide (CO2)?12 amu12 g44 g44 amu
- 6. Multiple ChoiceFind the percent composition of N2S2.N: 69.6% S: 30.4%N:36% S: 75.6%N: 96.6% S: 3.4%N: 30.4% S: 69.6%
- 7. Multiple Choice
Which of the following dimensional analysis setups will correctly convert 4.00x1023atoms of cobalt to moles of cobalt?
A
B
- 8. Multiple Choice
What is the molar mass of PbSO4?
303.27 g/mol
255.27 g/mol
163.87 g/mol
372.27 g/mol
- 9. Multiple Choice
How many molecules are in 2.5 moles of NaCl?
1.51 x1024 molecules
1.51 molecules
4.20 molecules
4.20 x10-24 molecules
- 10. Multiple Choice
Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?
A
B
C
D
- 11. Multiple ChoiceA formula with the lowest whole # ratio of elements in a compound is calledMolecular FormulaChemical FormulaEmpirical FormulaDistance Formula
- 12. Multiple Choice
A compound consists of 72.2% magnesium and 27.8% nitrogen by mass. What is the empirical formula?
Mg4N3
MgN2
Mg3N2
MgN
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