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Mole Conversions WorksheetThere are two moles equalities. They are:1 mole = 6.02×1023 particles 1 mole = molar mass in grams ( molar mass is equal to relative molecular mass ( if it is molecule), or relative atomic mass ( if it is atom)Mole-Particle Conversions 1.How many moles of magnesium are in 3.01×1025 atoms of magnesium. (Mg)2. a) How many molecules are there in 5.00 moles of glucose, C6H12O6 b) How many atoms of carbon? c) How many atoms of hydrogen?3. How many moles are 1.20×1025 atoms of phosphorous? (P4)4. How many atoms are in 0.725 moles of zinc? (Zn)5. a) How many molecules are in 0.600 moles of N2O5? b) How many atoms of nitrogen? c) How many atoms of oxygen? Mole-Mass Conversions1. How many moles in 28 grams of CO2?2. What is the mass of 5 moles of Fe2O3?3. Find the number of moles of argon in 452 g of argon.4. Find the mass in 2.6 mol of lithium bromide (LiBr)5. Find the grams in 1.26×10-4 mol of CH3COOH

Question

Mole Conversions WorksheetThere are two moles equalities. They are:1 mole = 6.02×1023 particles 1 mole = molar mass in grams ( molar mass is equal to relative molecular mass ( if it is molecule), or relative atomic mass ( if it is atom)Mole-Particle Conversions 1.How many moles of magnesium are in 3.01×1025 atoms of magnesium. (Mg)2. a) How many molecules are there in 5.00 moles of glucose, C6H12O6 b) How many atoms of carbon? c) How many atoms of hydrogen?3. How many moles are 1.20×1025 atoms of phosphorous? (P4)4. How many atoms are in 0.725 moles of zinc? (Zn)5. a) How many molecules are in 0.600 moles of N2O5? b) How many atoms of nitrogen? c) How many atoms of oxygen? Mole-Mass Conversions1. How many moles in 28 grams of CO2?2. What is the mass of 5 moles of Fe2O3?3. Find the number of moles of argon in 452 g of argon.4. Find the mass in 2.6 mol of lithium bromide (LiBr)5. Find the grams in 1.26×10-4 mol of CH3COOH

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Solution

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Mole-Particle Conversions:

  1. Number of moles = Number of particles / Avogadro's number = 3.01×10^25 atoms / 6.02×10^23 atoms/mole = 50 moles of Mg

  2. a) Number of molecules = Number of moles * Avogadro's number = 5.00 moles * 6.02×10^23 molecules/mole = 3.01×10^24 molecules of C6H12O6 b) Number of carbon atoms = Number of molecules * Number of carbon atoms per molecule = 3.01×10^24 molecules * 6 C atoms/molecule = 1.806×10^25 C atoms c) Number of hydrogen atoms = Number of molecules * Number of hydrogen atoms per molecule = 3.01×10^24 molecules * 12 H atoms/molecule = 3.612×10^25 H atoms

  3. Number of moles = Number of particles / Avogadro's number = 1.20×10^25 atoms / 6.02×10^23 atoms/mole = 199.34 moles of P4

  4. Number of atoms = Number of moles * Avogadro's number = 0.725 moles * 6.02×10^23 atoms/mole = 4.3645×10^23 atoms of Zn

  5. a) Number of molecules = Number of moles * Avogadro's number = 0.600 moles * 6.02×10^23 molecules/mole = 3.612×10^23 molecules of N2O5 b) Number of nitrogen atoms = Number of molecules * Number of nitrogen atoms per molecule = 3.612×10^23 molecules * 2 N atoms/molecule = 7.224×10^23 N atoms c) Number of oxygen atoms = Number of molecules * Number of oxygen atoms per molecule = 3.612×10^23 molecules * 5 O atoms/molecule = 1.806×10^24 O atoms

Mole-Mass Conversions:

  1. Number of moles = Mass / Molar mass = 28 g / 44.01 g/mole (Molar mass of CO2) = 0.636 moles of CO2

  2. Mass = Number of moles * Molar mass = 5 moles * 159.69 g/mole (Molar mass of Fe2O3) = 798.45 g of Fe2O3

  3. Number of moles = Mass / Molar mass = 452 g / 39.95 g/mole (Molar mass of Ar) = 11.31 moles of Ar

  4. Mass = Number of moles * Molar mass = 2.6 moles * 86.85 g/mole (Molar mass of LiBr) = 225.81 g of LiBr

  5. Mass = Number of moles * Molar mass = 1.26×10^-4 moles * 60.05 g/mole (Molar mass of CH3COOH) = 0.0076 g of CH3COOH

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