The sedative Demerol hydrochloride has the formula C15H22ClNO2 . How many grams are in 0.030 moles of Demerol hydrochloride?

Answer 1

To answer this question let's look at the individual elements of this compound:

15 Carbon

22 Hydrogen

1 Chlorine

1 Nitrogen

2 Oxygen

Now let's look at the molecular weight for each of these elements on a periodic table (you can also google the weights

Carbon: 12.0107

Hydrogen: 1.00784

Chlorine: 35.453

Nitrogen: 14.007

Oxygen: 15.999

We multiply the number of elements by their respective weight and add them all together

(15 x 12.0107) + (22 x 1.00784) + (1 x 35.453) + (1 x 14.007) + (2 x 15.999) giving us a total of 283.79098 grams per mole.

Since we have 0.030 moles we multiply our total weight by 0.030 giving us 8.51g for 0.030 of Demerol Hydrochloride