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Let’s take up the tests! Important info for re-writes: Wednesday at 3:30-5:30pm Extra help? Availability?. Lesson #3 – Molar Mass of a Compound. To find the molar mass of a compound, we need to look at ____________________ The molar mass ________________

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Lesson #3 – Molar Mass of a Compound

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Let’s take up the tests!Important info for re-writes: Wednesday at 3:30-5:30pmExtra help? Availability?


Lesson #3 – Molar Mass of a Compound

  • To find the molar mass of a compound, we need to look at ____________________

  • The molar mass ________________

  • ___________________________________molecule or formula unit of that compound.

  • Similar to balancing equations; you will have to take into consideration how many atoms of each element in a compound by ______________________________________


Sample Problem #1

  • What is the molar mass of magnesium carbonate?


Sample Problem #2

  • What is the molar mass of calcium phosphate?


Sample Problem #3

  • How many grams are in 5.4 moles of H2O?


Sample Problem #4

  • Convert 657g CuSO4 to moles


Homework!

  • Exercise 3, pg. 13 of the green book!

  • Really helpful exercise visually and practice doing calculations!


Lesson #4 – Moles, Grams, and Particles

  • Let’s put it all together!


The Magic Triangle!Relationship


The Magic TriangleCalculations


Sample Problem #1

  • Convert 2.40 x 1024 molecules of N2 to grams


Sample Problem #2

  • A spoonful of sugar, C12H22O11, has a mass of 10g. Calculate the number of molecules in a spoonful of sugar.


Sample Problem #3

  • To check for blockages in the digestive tract, a drink of barium sulfate is given to patients before an X-ray. X-rays can not pass through barium sulfate, it’s presence would appear on the X-ray film and a blockage would be apparent. If 0.500 mole of barium sulfate is needed, how many grams of barium sulfate will be given to the patient?


Sample Problem #3


Homework!

  • The rest of the questions on pg. 15 and the questions from the text!!

  • Lab on Wednesday!!

  • Re-writes are here before the lab!

  • See you then!!


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