The carbon (C) in the compound...

Question

The carbon (C) in the compound C₃H₃Cl₅ weighed 66 g. How much did the hydrogen (H) weigh? (C, 12; H, 1; Cl, 35)

(A) 3.4 g

(B) 1.2 g

(C) 66 g

(D) 1.375 g

(E) none of these

Answer 1

The weight of Hydrogen to Carbon in this compound is: 3x1/3X12=1/12

So, when we have 66 gr Carbon in this compound, the weight of Hydrogen should be 1/12 of it:

(1/12)x (66)=5.5 gr

Answer 2

The proportion of the mass of C to the mass of H in the compound is C:H of 3*12 to 3*1 or 12:1

Take the 66 g of C and multiply by 1 g H/ 12 g C. The answer is none of these.