Mole Calculations Page 3
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4Question 2
What is the mass of 2 moles of H
O?
2
Step 1: Read the question and identify the starting point and
the final destination.
In this case the starting point is 2 moles of H
O and the final destination is mass (g).
2
Step 2: Using your “Mole Road Map,” determine how many
fractions (not including the starting point) it will take to get from
the starting point to the final destination.
In this case, it will take one fraction to get from the starting point to the final destination.
Mass (g)
Moles
Molecules
1
Step 3: Take your starting point and place it over 1.
2 moles of H
O
2
1
Step 4: Multiply between fractions and make sure that the unit
on the bottom of the new fraction is the same as the unit on the
top of the previous fraction.
2 moles of H
O
x
_______________
2
1
moles of H
O
2
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