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Year 12s: what will be the first way you research your future options? >>
Year 12s: what will be the first way you research your future options? >>
Year 12s: what will be the first way you research your future options? >>

Reaction order rate

1.png
Hi why is the answer D?
I thought it would be 3x for first order
Then for second order 2^3 = 9
So 3+9 = 12

Thanks in advance :smile:
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Avatar for yusyus
yusyus
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Original post by sputnikswtheart
1.png
Hi why is the answer D?
I thought it would be 3x for first order
Then for second order 2^3 = 9
So 3+9 = 12

Thanks in advance :smile:


instead of doing 3+9 you have to do 3x9 as they are factors.
Imagine
a x b^2=c

multiplying b and a by 3

3a x (3b)^2 = a x c

3a x 9b^2 = a x c
27(a x b^2) = a x c


so a=27
Original post by yusyus
instead of doing 3+9 you have to do 3x9 as they are factors.
Imagine
a x b^2=c

multiplying b and a by 3

3a x (3b)^2 = a x c

3a x 9b^2 = a x c
27(a x b^2) = a x c


so a=27


Thanks for the explanation!

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