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Mole Test Review!!

Mole Test Review!!. What is the molar mass of Hg 2 Cr 2 O 7 ?. How many moles are in 125g of H 2 SO 4 ? 1.27 moles. How many moles are in 100.g of KMnO 4 ? .633 moles. How many grams are in 1.70 moles of KMnO 4 ? 269 g. How many Formula Units are in .456 g of (NH 4 ) 3 PO 4 ?

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Mole Test Review!!

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  1. Mole Test Review!!

  2. What is the molar mass of Hg2Cr2O7 ?

  3. How many moles are in 125g of H2SO4? • 1.27 moles

  4. How many moles are in 100.g of KMnO4? • .633 moles

  5. How many grams are in 1.70 moles of KMnO4? • 269 g

  6. How many Formula Units are in .456 g of (NH4)3PO4? 1.84 X 10 21 Formula Units

  7. How many H atoms are in .456 g of (NH4)3PO4? 2.21 X 10 22 H atoms

  8. How many molecules are in 34.400 g of CO2 ? • 4.71 X 10 23 molecules

  9. How many C atoms are in this mass? • 4.71 X 10 23 C atoms

  10. Find the empirical formula of a compound that is 48.38% carbon, 8.12% hydrogen, and 53.5% oxygen by mass • C6H12O5

  11. Find the molecular formula of a substance with the following components and a molar mass of 180g/mol: 40.00% C, 6.72% H, 53.28% O C6H12O6

  12. Use the following data collected in the lab to determine the empirical formula of MnCl formed. • mass of Mn metal: .192gMass of test tube plus metal: 19.453 gMass of test tube plus manganese chloride produced: 19.840 g • MnCl3

  13. How would the experimentally determined ratio of MnCl be affected if • Wasn’t heated enough? • Heated too much (presence of MnO) • Unreacted Manganese?

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