Question

18) Calculate the number of
moles in 2000 g of oxegene
molecule
caco3​

Answer 1

Answer:30 is no of moles of oxygen

Explanation:each mole of compound CaCO3 has 3 oxygen atom.

Total mass of CaCO3 is 100units or gm(mol)

Provided mass of CaCO3 is 2000gm

No. Of moles of CaCO3 is 2000/100=20

As we discussed earlier each mole has 3 O atoms total no of o atom is 20 *3=60

Now each o2 molecule has 2 o atoms

Therefore no of moles of o molecule are 60/2=30