Posted by escape on Saturday, October 4, 2008 at 11:00am.
Thank you for using the Jiskha Homework Help Forum. Here is what I found on testing:
3. (slide down to field tests): http://www.odvinc.com/newsletters/sp97-2.html
In the cocaine formula for every N (14 g/mole) atom here are 17 C (12g) atoms and 2 H (1g) atoms
Therefore thee ratios of masses of those three elements must be:
N -- 14
C --17*12 = 204
H --2*1 =2
Now how many moles of C in 150 g CO2?
(I am going to use grams instead of milligrams for everything because we are only interested in ratios in the end)
mole of CO2 = 12 +32 = 44 g/mole
so we have 150/44 = 3.41 moles CO2
and therefore 3.41 moles of C
which is 3.41 * 12 = 40.9 grams of C
Now how many moles of H in 46.05 g of H2O?
mole of H2O = 2+16 = 18 g/mole
so we have 46.05/8 = 2.56 moles H2O
and thus 2*2.56 = 5.12 moles of H
Now check ratios of either moles or grams
moles C/moles H = 3.41/5.12 = .666
but we know that we need 17 moles C to every 2 moles H if it is cocaine!
check my arithmetic and do more similar analysis for Nitrogen as well
46/18 not 46/8
The calculation is right above but I typed 8 instead of 18
chemistry - last one, i PROMISE A compound containing only C, H, O and Cr was ...
Chemistry - A compound containing only carbon, hydrogen and oxygen is subjected ...
Chemistry - Please help with this question: B) Combustion analysis of a 22.0-mg ...
CHEMISTRY - A geologist discovered a new rock which he suspected contained an ...
Chemistry ! - A geologist discovered a new rock which he suspected contained an ...
chem - combustion analysis of a 285.7 mg sample of a hydrocarbon produces 880.8 ...
Chemistry - combustion analysis of 63.8 mg of C,H, and O containing compound ...
Chemistry - Analysis of Tap water (Hardness) 50.00 mL of tap water was ...
ap chemistry - A 115 mg sample of eugenol, the compound responsible for the odor...
Chemistry - Could someone help me with these problems; A)If 5.97mL of a solution...
For Further Reading