Molar Mass

Molar Mass
Molar Mass
 The mass of 1 mole of an element or compound
 Units: g (grams)
 Molar mass = atomic mass
 Atomic mass of each element is in RED (units
are amu)
 Round to the nearest hundredth!!
For an Element
 Take the element Carbon (C)
 Molar mass = 12.01g
 1 mol of C = 12.01g
 How about Boron (B)?
 Molar mass =
For a Compound
 Take the compound NO
 Molar mass of the compound = sum of the molar
mass of each element
 14.01 + 16.00 = 30.01g
 1 mole of NO = 30.01g
 How about CO2
 Molar mass =
What is the molar mass of:
Example 12
Calculate the mass in grams of 0.0450 moles of chromium (Cr).
Example 14
What is the mass of 2.50 moles of CH4?
Example 16
Determine the number of moles in 35.5g of silver (Ag).
Example 18
Calculate the number of moles of 325g of Ca(OH)2
Example 20
How many atoms are in 63.2g of beryllium (Be)?
Example 21
How many formula units (f.u.) are in 124g of mercury(II) chloride
Example 22
What is the mass in grams of 3.15x1024 atoms of silver (Ag)?
Example 23
What is the mass in grams of 1.50x1015 molecules of silver dioxide

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