Question

question 4 of 10
what does percent composition tell you about a substance?
a. it tells you how many moles are in the substance.
b. it tells you what the substance is made of.
c. it gives you the molecular formula of the substance.
d. it gives you the total mass of the substance.

Explanation:

Percent - composition gives the percentage by mass of each element in a substance, which tells what the substance is made of in terms of the proportion of its elements. It doesn't directly tell the number of moles, the molecular formula, or the total mass.

Answer:

B. It tells you what the substance is made of.