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Mole and Avogadro’s Number Worksheet with Answers, Exercises of Chemistry

Western International University (WIU)Chemistry

Avogadro’s number contain 6.02 x 1023 molecules, and mole is the amount of substance containing the same number of discrete entities which are atoms, molecules, and ions.

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Molar Mass Worksheet – Answer Key
Calculate the molar masses of the following chemicals:
1) Cl2 71 g/mol
2) KOH 56.1 g/mol
3) BeCl2 80 g/mol
4) FeCl3 162.3 g/mol
5) BF3 67.8 g/mol
6) CCl2F2 121 g/mol
7) Mg(OH)2 58.3 g/mol
8) UF6 352 g/mol
9) SO2 64.1 g/mol
10) H3PO4 98 g/mol
11) (NH4)2SO4 132.1 g/mol
12) CH3COOH 60 g/mol
13) Pb(NO3)2 331.2 g/mol
14) Ga2(SO3)3 379.7 g/mol
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Download Mole and Avogadro’s Number Worksheet with Answers and more Exercises Chemistry in PDF only on Docsity!

Calculate the molar masses of the following chemicals: Molar Mass Worksheet^ –^ Answer Key

    1. ClKOH 2 71 g/mol 56.1 g/mol
    1. BeClFeCl 32 162.3 g/mol80 g/mol
    1. BFCCl (^3 2) F 67.8 g/mol 2 121 g/mol
    1. Mg(OH)UF 6 352 g/mol 2 58.3 g/mol
    1. SOH 3 PO 2 64.1 g/mol 4 98 g/mol
    1. (NHCH 34 COOH) 2 SO 4 132.1 g/mol60 g/mol
    1. Pb(NOGa 2 (SO 3 ) 32 ) 3 331.2 g/mol379.7 g/mol

1) How many moles of water does 6.02 x 10 Avogadro’s Number and the Mole^23 molecules represent?

  1. Convert 3.01 x 10^23 molecules of C 2 H 6 to moles
  2. How many moles of glucose does 1.2 x 10^24 molecules represent?
  3. How many moles of CaCl 2 does 2.41 x 10^24 formula units represent
  4. How many atoms does 2.0 moles of He represent?
  5. How many sodium ions are in 3.0 moles of NaCl?
  6. How many molecules are in 0.25 moles of CH 4?
  7. How many total atoms are in 1.0 moles of H 2 O?

1) How many molecules are there in 24 grams of FeF Combined Mole Calculations^ –^ 3 Answer Key? 1.28 x 10^23 molecules

    1. How many molecules are there in 450 grams of NaHow many grams are there in 2.3 x 10 (^24) atoms of silver? 2 SO 4? 421 grams1.91 x 10^24 molecules
    1. How many grams are there in 7.4 x 10How many grams are there in 7.5 x 10^2323 molecules of AgNOmolecules of H 2 SO 43 ?? 122 grams209 grams
  3. How many molecules are there in 122 grams of Cu(NO molecules 3 ) 2? 3.92 x 10^23
    1. How many grams are there in 9.4 x 10How many molecules are there in 230 grams of CoCl^25 molecules of H 2? 2 1.07 x 10? 312 grams (^24) molecules
    1. How many molecules are there in 2.3 grams of NHHow many grams are there in 3.3 x 10 (^23) molecules of N 4 SO 2? 2 I (^6)? 1.69 x 10 430 grams^22 molecules
    1. How many molecules are there in 200 grams of CClHow many grams are there in 1 x 10 (^24) molecules of BCl 4? 7.82 x 10 3? 195 grams^23 molecules
    1. How many grams are there in 4.5 x 10How many molecules are there in 9.34 grams of LiCl?^22 molecules of Ba(NO 1.33 x 10 2 ) 2? 23 17.1 grams (^) molecules
    1. How many grams do 4.3 x 10How many molecules are there in 230 grams of NH^21 molecules of UF 6 weigh? 4 OH? 2.51 grams3.96 x 10 (^24) molecules

More Combined Mole Calculations- Solutions

1 2. Calculate grams in 3.0000 moles of CO 3. Calculate number of moles in 32.0 g of CH. Calculate the mass of 1.000 mole of CaCl 2 132.03g 24 110.986g/mol2.00mol

  1. Determine mass in grams of 40.0 moles of Na 5. Calculate moles in 168.0 g of HgS 6. Calculate moles in 510.0 g of Al 2 S 3 0.722mol 3.396mol 2 CO 3 4240g
  2. How many moles are in 27.00 g of H 8. Determine the mass in grams of Avogadro number of C 9. Find mass in grams of 9.03 moles of H 2 O 2 S 1.50mol 308g 12 H 22 O 11 342.3 g/mol
  3. Determine grams in 1.204 mole of NH Consider the molecule CuNH 4 Cl 3 as you answer 11 - 20. 3 20.50g
  4. Name the elements present. 12. How many atoms form the molecule? 13. How many of each atom in the molecule? Copper, Nitrogen, Hydrogne, Chlorine Nine Cu-1, N-1, H-4, Cl-
  5. How many hydrogen atoms in one mole of molecules? 15. How many chlorine atoms in six moles of molecules? 16. What is the molar mass of this molecule? 187.94 g/mol 1.084 x 10 2.41 x 10 2524 atomsatoms
  6. What is the mass in grams of one molecule? 18. How many moles would be in 6.84 g of this substance? 19. You need 0.0100 mole of lead (II) chromate. How much should you weigh on the 3.121 x 10 -220.0364molg scale? 20. Given 6.40 g of HBr. How many moles is this? 3.23g 0.0791mol Write the correct formula for calcium acetate and then answer 21 - 23 based on it.21. What is the mass of exactly one mole of calcium acetate? Ca(C 2 H 3 O 2 ) 2 158g/mol
  7. How many moles are contained in 1.58 g of the substance in #23? 23. How much does 0.400 mole of #23 weigh? 24. Write the formula for oxygen gas. O 2 63.3g 0.01mol
  8. How many atoms (and moles) are represented by the formula in #24? mole of molecules 26. What is the mass of Avogadro Number of oxygen molecules? 31.9988 g/mol 2 atoms, 1/NA