If there are 17.5 grams of sugar in 225 grams of an aqueous sugar solution, the percent-mass sugar is

% m/m (sugar) = 7.77 %

Explanation:

Step 1: Given data

Mass of sugar (solute): 17.5 g

Mass of solution: 225 g

Step 2: Calculate the percent by mass of sugar

The percent by mass of sugar is equal to the mass of sugar divided by the mass of the solution times 100%.

% m/m (sugar) = (mass of sugar / mass of solution) × 100%

% m/m (sugar) = (17.5 g / 225 g) × 100%

% m/m (sugar) = 7.77 %

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.