Question

A 12 fluid ounce Coca-Cola contains 6.9*10^22 molecules of sugar (C12H22O11). How many grams of sugar are there in a coke?

Answer 1

Answer:

37.62 g

Explanation:

First we convert 6.9x10²² atoms of C₁₂H₂₂O₁₁ to moles, using Avogadro's number:

• 6.9x10²² atoms ÷ 6.023x10²³ atoms/mol = 0.11 mol

Then we convert moles of C₁₂H₂₂O₁₁ to grams, using its molar mass:

Molar mass of C₁₂H₂₂O₁₁ = (C molar mass)*12 + (H molar mass)*22 + (O molar mass)*11 = 342 g/mol

• 0.11 mol * 342 g/mol = 37.62 g