Question

Please can someone help me, will give a medal. Thanks.

Which of the following pairs does not share the same empirical formula?

A) CH2O and C3H6O3
B) PbCl2 and PbCl4
C) NO2 and N2O4
D) C3H12 and CH4

Answer 1

well what is an empirical formula?wikipedia says the empirical formula of a chemical compound is the simplest positive integer ratio of atoms present in a compound

Answer 2

so lets look at a ch2o and c3h6o3. to determine if they are a pair u see 1 c to the other one's 3. so u multiply the ch2o by 3. this will equal c3h6o3, which is the matched answer

Answer 3

lets try C3H12 and CH4 this is 1C vs 3C. so multiply CH4 by 3= C3H12, the matched answer. try the other 2