Chemical Measurments
Define each of the following terms in complete sentences.
1.mole ____________________________________________________________________________
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2. formula mass _____________________________________________________________________
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3. formula unit ______________________________________________________________________
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4. Avogadro's number ________________________________________________________________
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5. molar mass _______________________________________________________________________
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If the statement is true, write "true." If it is false, change the undrlined word or words to make it true.
________________6. The atomic mass of an atom is based on a comparisono with the mass of sulfer-32.
________________7. A mole of any element contains 6.02 x 10^23 atoms.
________________8. A mole of an ionic compound contains 6.02 x 10^23 molecules.
________________ 9. The molar mass of a substance in grams is always equal to the formula mass in amu.
________________ 10. One mole of HNO3 contains 3 atoms of oxygen.
Find the formula mass of each of the following compounds. Show all your work.
11. CaCO3
12. MgSO4
13. NaOH
14. KCl
15. BaF2
Find the molar mass of each of the following compounds. Show all your work.
16. nitric acid (HNO3)
17. ammonia (NH3)
18. calcium sulfate (CaSO4)
19. potassium sulfide (K2S)
20. iron (III) chloride (FeCl3)