The label on an Ocean Spray Cran-Raspberry drink lists 30 g of sugar in 240 mL of drink. I weighed 240 mL of drink and found its mass to be 251 g. What is the percent composition of sugar in the drink?
1 Answer
Explanation:
We use percent composition as a measure of how many grams of a given substance are present in exactly
In this case, the percent composition of sugar in the beverage will tell you how many grams of sugar you get for every
Now, you know that you have
#100 color(red)(cancel(color(black)("g drink"))) * "30 g sugar"/(251color(red)(cancel(color(black)("g drink")))) = "11.95 g sugar"#
This means that the percent composition of sugar in the drink will be
#color(darkgreen)(ul(color(black)("% sugar = 12%")))#
I'll leave the answer rounded to two sig figs, but keep in mind that you only have one significant figure for the mass of sugar.