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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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butterfly127 butterfly127
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Posts: 1339
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7 years ago
1.  What is the condensed formula for 3-hexene?
A. CH3-CH-CH-CH-CH-CH3
B. CH3CH2CH2CH2CH2CH3
C. CH3CHCH2CH2CH2CH3
D. CH3CH2CHCHCH2CH3

2.  How much energy (calories) is needed to raise 12.0 grams ethanol at 24.0 oC to 42.0 oC? specific heat of ethanol = 0.58 cal/g oC
A. 18.5 cal B. 99.0 cal C. 125.2 cal D. 341.4 cal
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#1
Educator
7 years ago
Quote from: butterfly127 (7 years ago)
1.  What is the condensed formula for 3-hexene?
A. CH3-CH-CH-CH-CH-CH3
B. CH3CH2CH2CH2CH2CH3
C. CH3CHCH2CH2CH2CH3
D. CH3CH2CHCHCH2CH3

CH3CH2CH=CHCH2CH3


Quote from: butterfly127 (7 years ago)
2.  How much energy (calories) is needed to raise 12.0 grams ethanol at 24.0 oC to 42.0 oC? specific heat of ethanol = 0.58 cal/g oC
A. 18.5 cal B. 99.0 cal C. 125.2 cal D. 341.4 cal

Here's a similar question:

How many calories are required to raise the temperature of 5 grams of water from 10oC to 15oC?

Answer:

The change in temperature is 5 degrees and the mass is 5 grams. Multiply both of these terms times the specific heat of water so that the units of degrees and grams both cancel out.

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