The heat of fusion for a substance is 122 joules per gram. How many joules of heat are need to melt 7.50 grams of this substance
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The ball and stick model of C subscript 2 H subscript 4 is described as Option C: Each C has 2 H's connected to it each by 1 black.
This means the same as the 3D structure image of ethylene (C2H4) and means 2 C's connected by 2 black lines.
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The structure of ethylene is made up of 2 carbon atoms and 4 hydrogen atoms.
The carbon atoms are located at the middle position and the hydrogen atom surrounding the carbon atoms with two hydrogen atoms connected to each carbon atom. The two black lines connecting the carbons are the double bonds.
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