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In this video, we're going to go over how to calculate percent composition by mass.
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Specifically, we're going to use sno2 as our example.
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Start calculating percent composition by mass.
00:14
We need to get the molar mass of each element present.
00:18
The molar mass of 10, or sn, is 118 .71 atomic mass units.
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The molar max of oxygen is 15 .999 atomic mass units.
00:30
Once we have those, we need to calculate the molar mass of the entire compound.
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To do this, we take the molar mass of 10, 118 .71, and add it to two times the molar mass of oxygen.
00:48
We need to multiply the molar mass of oxygen by 2 because we have an 02 in this equation, meaning we have 2 oxygen...
