Posted by Jimmy on Sunday, September 27, 2009 at 4:52am.
Which hydrocarbon pair below have identical mass percentage of C?
A: C3H4 and C3H6
B: C2H4 and C3H4
C: C2H4 and C4H2
D: C2H4 and C3H6
E: None of the above
My answer is E...Can any one help me?
chemistry. - DrBob222, Sunday, September 27, 2009 at 12:21pm
I think you are correct. To have the identical mass percentage of C the "other" compound must have a multiple of C with the same multiple of H and none of the answers qualify.
chemistry. - Ian, Sunday, September 27, 2009 at 8:55pm
A trick to solving this type of problem is to reduce all of the ratios to either their simplest form or a percentage.
Ex. 3C/6H => 2C/4H => 1C/2H = 50% C
1/2 is the simplest form, and the molecule is 50% Carbon.
With this in mind, you should look over your options once more.
chemistry. - Sahar, Tuesday, February 16, 2010 at 9:22pm
all of above is wrong.
i have the same question for school.
chemistry. - Amanda, Tuesday, June 30, 2015 at 7:46pm
should be D: C2H4 and C3H6
both give you the ratio 1:2
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