Question

calculate percentage of oxygen in water at H is equal to 1 u and O is equal to 16 you calculate mass of water present in 0.25 mole of it​

Answer 1

Answer:

Molecular mass of H2O=2+16=18g

As there are 2 hydrogen atoms in 1 mole of water ; Molar mass of H in 1 mole of H2O=1×2=2g

Therefore %age of H in H2O =182×100=11.1%

Also molar mass of O in 1 mole of H2O =16gTherefore %age of O in H2O =1816×100=88.9