Question

Please answer ques no. 21 ANSWER IS 1.3384*10^21

Answer 1

hey i guess u r finding moles using the volume.You actually need to find the mass of the water drop and then find moles by dividing it with the molar mass of h2o. Density of water is 1gram/ml. so its mass will be 0.04gm. Now u will get the answer.Enjoy!!