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InterviewSolution
| 1. |
of water at room temperature is 1.0 g/mL. How many molecules are there in a drop of water if its volume is0.05 ml.?ait ofacid hase hy takinp suitable example |
| Answer» <p>Mass = Volume*Density so, A.T.Qmass of water= (0.05*1)g =0.05g H2O (both millilitres cancel out)=no of molecules= no of moles*6.022*10^23Now, no of moles= given mass/molecular mass=0.05 /18 (since molecular mass of h2o =1*2+16 )no of molecules= 0.05/18*6.022*10^23</p><p>no of moleculesin 1 drop of water =1.672 *10^21</p> | |