[yazz]

question: A vitamin supplement tablet contains 100 mg of niacinamide ( C6H6N2O). what mass of niacin ( C6H5NO2) contains an equivalent number of moles as 100 mg of niacinamide?

My solution: i think you have to calulate the molar mass for both niacinamide and niacin and then let X= g of niacin
so 100/mm of niacinamide=X/mm of niacin and then find x. and that will give you your equivalent mass for niacin

i am not sure though
can someone reply with the right answer to my question.
thankz in advance.

[constant thinker]

I think if you...

Convert to grams of niacinamide. (.1g)
Convert to moles of niacinamide. (a really small number)
Then to moles of niacin. (1mol niacin/1mol niacinamide) (same really small number)
Then to grams of niacin. (a very little more than .1g)

... That should give you what you're looking for.

Or you're formula almost works. You just need grams.
So...
((.1 g niacinamide)/(molar mass of niacinamide))=(x g)/(molar mass of niacin)