Answer:
percentage mass of oxygen = 53.2%
Step-by-step explanation:
A sample of carbohydrate is 5.00 g . The carbohydrate contains carbon, hydrogen and oxygen . The
mass of carbon = 2.006 g
mass of hydrogen = 0.334 g
mass of oxygen = 2.66 g
The total mass of the sample is 5.00 g which is the sum of the mass of the whole elements present in the compound.
percentage mass of oxygen = 2.66/5.00 × 100
percentage mass of oxygen = 266 /5
percentage mass of oxygen = 53.2
percentage mass of oxygen = 53.2%