A practical joker adds table salt (NaCl) to a sugar (C12H22O11) container that originally held 5kg of sugar. A chemist wishes to prepare a 1.5 molal solution of sucrose in water. He determines out the appropriate amount from the contaminated container to mix with the 3.00 kg of water. His experiments do not seem to work. He later discovers that the percent carbon in 100 g of the solution is12.10% by mass and consequently, determines that his solution is too dilute in sugar. Explain what mass of NaCl did the practical joker add to the container of sugar?