How many carbon atoms are there in 15 lbs of sugar, C₁₂H₂₂O₁₁

Question

Quizplus · Accepted Answer

To find the number of carbon atoms in 15 lbs of sugar, we first need to find the molar mass of sugar. 
C₁₂H₂₂O₁₁ has a molar mass of 342.3 g/mol. 
Converting 15 lbs to grams gives us 6804.4 g. 
Dividing this by the molar mass of sugar gives us the number of moles of sugar: 
6804.4 g ÷ 342.3 g/mol = 19.89 mol 
Since sugar has 12 carbon atoms per molecule, multiplying the number of moles by Avogadro's number gives us the number of carbon atoms: 
19.89 mol x 6.022 x 10²³/mol x 12 C/molecule = 1.430 x 10²⁶ C atoms 
Rounding to the nearest order of magnitude gives us 1.4 x 10²⁶ C atoms, which is answer choice C.

How Many Carbon Atoms Are There in 15 Lbs of Sugar