The radius of water molecule having density 1g mL-1 is

.Volume of 1gm water molecules= 1cm3Volume of 181​ mole of water= 10−6m3181​ mole of water= 6.023×1023×181​ molecules of waterVolume of 181​×6.023×1023 molecules= 10−6m3Hence, Volume of one water molecule= 0.2988×10−28m3Let. the radius of water molecule be r0.2988×10−28=34​×π×r3⇒ r=0.1925 nm=1.925A˚