Have an account?
Skip to Content
Build your own quiz
18 questions
Show Answers
See Preview
- 1. Multiple ChoiceWhich pair has the same empirical formula?NaCrO4 and Na2Cr2O7C2H4O2 and C6H12O6C3H6O3 and C2H6O2CH4 and C2H6
- 2. Multiple ChoiceA formula with the lowest whole # ratio of elements in a compound is calledMolecular FormulaChemical FormulaEmpirical FormulaDistance Formula
- 3. Multiple ChoiceA chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________ionic formulacovalent formulaempirical formulamolecular formula
- 4. Multiple ChoiceHow many molecules are in 2.5 mol of NaCl?1.51x10231464.151.51x1024
- 5. Multiple ChoiceHow many atoms of carbon are in 6.00g of carbon?1.20x1024atoms C6.02x1023atoms C3.01x1023atoms C1.50x1023atoms C
- 6. Multiple ChoiceHow many grams are in 1.2 x 1024 molecules of CO?28 grams56 grams6.02 grams1.2 grams
- 7. Multiple ChoiceWhat are the units for molar mass?gramsamugrams/moleliters
- 8. Multiple ChoiceWhat is the molar mass of table salt (NaCl)?116.886 g/mol35.453 g/mol22.990 g/mol58.443 g/mol
- 9. Multiple ChoiceWhat is the mass of 0.89 mol of CaCl2?111 grams0.008 grams98.9 gramsnone of the choices
- 10. Multiple Choice
What is the emipirical formula for C4H6 ?
CH
CH3
C2H3
C4H6
- 11. Multiple Choice
A chemical reaction produces 0.37 mol of N2 gas. What volume will that gas occupy at STP?
0.02 L
10.4 L
5.2 L
8.3 L
- 12. Multiple Choice
A container with a volume of 893 L contains how many moles of air at STP?
20003.2 L
39.9 L
22.4 L
none of the choices
- 13. Multiple Choice
How many molecules of water are in a 821.3 g sample?
45.58 molecules
8.232 x 1025 molecules
8.909 x 1027 molecules
2.744 x 1025 molecules
- 14. Multiple Choice
What is the mass of 4.98 x 1024 atoms of Zn?
541 g
8.27 g
.122 g
4.59 x 1046 g
- 15. Multiple Choice
A sample of AlCl3 contains a total of 4.515 x 1027 atoms of chlorine. What must be the mass of this sample?
2.500 x 105 g
1.000 x 106 g
18.75 g
3.333 x 105 g
- 16. Multiple Choice
What is the empirical formula for N2S3?
NS
N3S2
N2S3
N1S1.5
- 17. Multiple Choice
Si2F6
Choose the correct empirical formula...
SiF
Si2F6
SiF3
Si6F2
- 18. Multiple Choice
Which molecular formula only has 12 hydrogens "H"?
C4H10 (butane)
C5H12 (pentane)
C12H22O11 (sugar)
C8H10N4O2 (caffeine)
- Answer choicesTagsAnswer choicesTags