Question

Number of molecules in 1 litre of oxygen at STP is

Answer 1

Answer:

330×10^23

Explanation:

density of water is 1gm/ml

so 1000 ml (1 l) of water will have weight = 1000g

in 1000g there are 55.55 moles of water

and in one mole of any substance there are 6×10^23 particle (approx)

so in 55.55 mole there will be

55.55 ×10^23 molecule of water

that is 330×10^23 molecule (approx)