Got Mole Problems?.

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Presentation transcript:

Got Mole Problems?

Mole Unit Conversions Standards: 1 mole = Molar Mass 1 mole = 6.02 x1023 molecules 1 mole = 22.4 L of gas 1 molecule = __ atoms

MOLE Number of Molecules Mass (g) Volume of a GAS (L) Atoms in a M.C. 1 mole = 6.02 x 1023 molecules 1 m.c. = # atoms in formula 1 mole = Molar Mass g 1 mole = 22.4 L

Grams to Moles 1.) Calculate the number of moles in 35.00 grams of ammonium dichromate (NH4)2Cr2O7

Moles to Grams 2.) What is the mass of a 0.0895 mole sample of ethanol C2H5OH?

Molecules to Moles 3.) How many moles are present in a sample that contains 4.10 x 1024 molecules of sodium chloride, NaCl?

Moles to Molecules 4.) How many molecules are in 6.65 moles of sodium iodide, NaI?

Molecules to Atoms 5.)If you have 2.50 x 1023 magnesium chloride molecules, MgCl2, how many total atoms are present? 6.)How many chlorine atoms are present?

Multi-step Problem 7.) Calculate the number of molecules in 70.0 grams of H2O.

Multi-step Problem 8.) How many (total) atoms are present in 1.23 moles of NaOH?

Multi-Step Problem 9.) What is the mass of 2.56 x 1025 atoms of copper?

Multi-Step Problems 10.) What is the number of moles in 150.0 grams of aluminum sulfate, Al2(SO4 )3?