Stanton D. answered • 05/19/20

Tutor to Pique Your Sciences Interest

Hi Yolanda J.,

You're rounding your numbers too soon!

Calculate exactly, **then** find the best ratio: hint: usually the oxygens are the least, so try to make them an integer.

So: 80.16/12.01 = 6.67443796836

9.63/1.008 = 9.55357142857

10.17/16.00 = 0.635625

So try oxygens = 1 as the first ratioing (or the equivalent):

6.6744/0.6356 = 10.50

9.5536/0.6356 = 15.03

0.6356/0.6356 = 1

Well, you can see that you just need to double these values, to be nicely integral.

So: C_{21}H_{30}O_{2} .

And by the way, marijuana contains oodles of chemicals, many of them active in one way or another. There's quite an industry built around CBD (cannabidiol), for example.

-- Cheers, -- Mr. d.