What is the mass of carbon contained in 245 g of sucrose (C₁₂H₂₂O₁₁)?

Question

Quizplus · Accepted Answer

The molecular formula of sucrose is C12H22O11. To find the mass of carbon in sucrose, we need to find the number of carbon atoms in one molecule of sucrose and multiply that by Avogadro's number to find the mass of carbon in one mole of sucrose. One molecule of sucrose contains 12 carbon atoms, so one mole of sucrose contains 12 moles of carbon with a mass of 12 x 12 g/mol = 144 g/mol. Therefore, the mass of carbon in 245 g of sucrose is (12/144) x 245 g = 20.42 g. Rounding to the nearest whole number gives an answer of 20 g, which is closest to choice C (103 g).

What Is the Mass of Carbon Contained in 245 G