A) \[{{10}^{-3}}N\]
B) \[{{10}^{-2}}N\]
C) \[{{10}^{-1}}N\]
D) \[10N\]
Correct Answer: A
Solution :
Given, weight of water \[=18\,mg=18\times {{10}^{-3}}g\] \[\therefore \]Number of moles \[=\frac{\text{weight}}{\text{molar}\,\text{mass}}\] \[=\frac{18\times {{10}^{-3}}}{18}=1\times {{10}^{-3}}\] and number of molecules = no. of moles \[\times \] Avogadro number. \[=\,1\times {{10}^{-3}}\times N\] \[={{10}^{-3}}N.\]
You need to login to perform this action.
You will be redirected in
3 sec
