Question

Layla dissolved a tablespoon 50.0 grams of sugar (c12h22o11) into 200 grams of water.
Which substance contained the greatest number of oxygen atoms, the sugar or the water? (Show full working)

Answer 1

Molar mass of sugar = 342.3 gm

So 342.3 gm of sugar contains 11 mole of oxygen atom.

Then 50 gm of sugar will contain $\frac{11×50}{342.3}=1.6067\ mole\ oxygen$

Similarly,

18 gm of water contains 1 mole of oxygen atom

So, 200 gm water will contain $\frac{1×200}{18}=11.11\ mole \ oxygen\ atom$

Hence water contains the more no. of oxygen atoms