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Every substance is either an element or a ____. Fill in the blank. Molecular Compounds is the chapter I'm on.
asked
Oct 13, 2015
Chemistry
high-school
2
answers
5
votes
67.6k
views
The air in the stratosphere is less dense and more______then in the troposphere
asked
Aug 18, 2015
Biology
high-school
1
answer
1
vote
82.8k
views
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