Cumene is a cmpd containing only C and H that is used in the production of aceton and phenol in the chemical industry. Combusetioni of 47.6 mg of cumene produces some Co2 and 42.8 mg of water. The molar mass is between 115-125. determin the mpirical formula nad molecualr formula.Please show work.
i have no idea what im doin wrong here. Seriously
2007-08-22 16:07:06 · 1 answers · asked by Krazym0nkey 2 in Science & Mathematics ➔ Chemistry
My bad folks it should be Determine the empirical and molecular formula
2007-08-22 17:02:04 · update #1
Work out the mass of H in the 42.8mg of water by multiplying it by 2/18. Subtract this from the 47.6mg of cumene and you have the mass of C.
Now you have the masses of C and H you can divide each by the Ar and get the empirical formula in the normal way.
Then, keeping the ratio of C:H constant, see how many you can fit into an Mr of 115-125 for the molecular formula.
2007-08-22 20:16:41 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋