Mole Calculations

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Question 1
How many atoms are in 37 grams of Oxygen?
Step 1: Read the question and identify the starting point and
the final destination.
In this case the starting point is 37 grams of Oxygen and the final destination is atoms.
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 two fractions to get from the starting point to the final destination.
Mass (g)
Moles
Atoms
1
2
Step 3: Take your starting point and place it over 1.
37 grams of Oxygen
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.
37 grams of Oxygen x
_________________
1
grams of Oxygen

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