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Hchem bell ringers 1 30 to 2-17

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Honors Chemistry Bell ringers semester 2 set 1

Honors Chemistry Bell ringers semester 2 set 1

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  • 1. Honors Chemistry Molar Calculation Practice Assignment 1/26/12Using elements and compounds from the naming quiz1/25/12:1. Determine the molar masses of each1. How many apply the following: 6. How many moles in 3.3 grams of2. Then moles in 5 grams of … …2. What is the mass of 5 moles of ... 7. What is the mass of 3.3 moles of …3. How many moles in 10 grams of … 8. What is the % composition of each element in …4. What is the mass of 10 moles of … 9. How many moles in 6.6 g of …5. What is the % composition of each 10. What is the mass of 6.6 moles of
  • 2. Honors Chemistry Bell ringer 1/30/12Considering what you know about thestructure of atoms explain why the chargeon an ion would not affect its molar mass.Name three things that might happen in achemical reaction.
  • 3. Honors Chemistry Bell ringer 1/30/12Electrons are about 2000 time smaller thanprotons so losing one or more electrons willnot affect the molar mass of a substance.Three things that might happen in achemical reaction: Color changes, gasevolves, heat is created
  • 4. Honors ChemistryBell ringer 1/31/12For each of the following reactions identifythe missing Reactants or Products andbalance the Eq.
  • 5. Honors ChemistryBell ringer 1/31/12For each of the following reactions identifythe missing Reactants or Products andbalance the Eq.
  • 6. Honors Chemistry Bell ringer 2/1/12Which of these reactions will occur andwhich will not. If a reaction will occur whatis the balance Rxn.
  • 7. Honors Chemistry Bell ringer 2/2/12What are the ratios of elements in:CO2C 2O 2By mass?By # of particles?
  • 8. Honors ChemistryBell ringer 2/3/12Read The Case for Combustionon Page 278-279
  • 9. Honors Chemistry Bell ringer 2/8/121. In the lab we just finished was theprocess a chemical or a physicalchange?2. Were there indications that thechange was chemical? Describe.3. Were there indications that thechange was physical? Describe.
  • 10. Honors Chemistry Bell ringer 2/9/124.51 grams of water were evaporated from a10.00 gram sample of Iron (II) sulfatehydrate.1. What is the percent composition of water in the hydrate?2. What is the mass of the anhydrous iron (II) sulfate?3. What is the empirical formula for the iron (II) sulfate hydrate?
  • 11. Honors Chemistry Bell ringer 2/10/124.51 grams of water were removed from a10.00 gram sample of Iron (II) sulfatehydrate.1. What is the percent composition of waterin the hydrate?2. What is the chemical formula for the Iron(II) sulfate?
  • 12. Honors ChemistryBell ringer 2/13/12
  • 13. Honors ChemistryBell ringer 2/14/12
  • 14. Honors Chemistry Bellringer 2/16/12 Write the Chemical formulas for the following compounds Magnesium sulfate Copper (II) sulfate Lead (II) nitrate Silver nitrate Zinc sulfate

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