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What is the sign of the heat change for an exothermic reaction? for an endothermic reaction?
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Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.
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How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.
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Chemistry, 22.06.2019 22:00
The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?
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What is the sign of the heat change for an exothermic reaction? for an endothermic reaction?...
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