Question

Help with this chemistry question please???

Answer 1

To find percent composition, you should first find the total of all of the components. Just add them all together:

$100g+200g+50g=350g$

Then, divide the amount of the component you are interested in, in this case, chocolate (50g), by the total amount to give:

$\frac{50g}{350g}$

This will give you the answer in decimal form, but to convert to a percent, you need to multiply by 100:

$\frac{50g}{350g}*100$

Therefore, the answer choice that is correct is A.