Product a is an 8 oz. bottle of cough medication that sells for $1.36. product b is a 16 oz. bottle of cough medication that costs $3.20. which product has the lower unit price?

Unit price = price / quantify.  In this case, unit price is $/oz.

Unit price for A =$1.36/8 oz = $0.17 / oz
Unit price for B =$3.20/16 oz = $0.20 / oz.

Therefore product A has a lower unit cost.

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the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.