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THE MOLE Answer Key

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Grams to Moles
#1 What is Molar Mass? Where do we find it? Mass of 1 mole of a pure substance. Red number on the periodic table
#2 12.01g Carbon (C) 1 Mole Carbon (C)
#3 10.1g Hydrogen (H) 10 Mole Hydrogen (H)
#4 150g Arsenic (As) 2 Mole Arsenic (As)
#5 7g Silicon (Si) 0.25 mole Silicon (Si)
Moles to Grams
#1 Compare the number of atoms? A mole of Hydrogen OR A mole of Lead? THE SAME!
#2 1 mole Copper (Cu) 63.55g Cu
#3 2.5 mole Nickel (Ni) 146.725g Ni
#4 0.5 mole Silver (Ag) 53.935g Ag
#5 1.125 Mole Gold (Au) 221.59g Au
Moles to Atoms
#1 What has a larger mass? A mole of Hydrogen or a Mole of Lead? LEAD!
#2 1 mole Vanadium (V) 6.02 x10^23 atoms V
#3 2 mole Magnesium (Mg) 12.04 x10^23 atoms Mg
#4 6 mole Iron (Fe) 36.12 x10^23 atoms Fe
#5 10 mole Titanium (Ti) 60.2 x10^23 atoms Ti
Atoms to Moles
#1 What is Avogadro's Number? 6.02 x 10^23
#2 6.02 x 10^23 atoms Nitrogen 1 mole N
#3 3.01 x10^23 Carbon 0.5 mole C
#4 2.00 x10^23 atoms Hydrogen 0.33 mole H
#5 12.04 x10^23 atoms Helium 2 mole He
2 Step Mole Conversions
#1 What units are Molar Mass measured in? grams per mole (g/mol)
#2 How many Atoms are in 60 grams Calcium (Ca)? 9.03 x 10^23 atoms Calcium
#3 What is the mass in grams of 3.01x10^23 atoms Cobalt (Co)? 28.47g Cobalt
#4 How many Atoms are in 2.02 grams Hydrogen (H)? 12.04 x10^23 atoms Hydrogen
#5 What is the mass in grams of 18.06x10^23 atoms Phosphorous (P)? 92.91g Phosphorous
Final Question