A) 18 molecules of water
B) 1.8 g of water
C) 18 got water
D) 18 moles of water
Correct Answer: D
Solution :
Key concept Mole is the biggest unit to measure number of molecules/atoms/ions. \[\because \] 1 mole of water contains molecules = \[6.02\times {{10}^{23}}\] \[\therefore \] 18 moles of water contain molecules \[=18\times 6.02\times {{10}^{23}}\] molecules Now, 1 mole of water = 18 g of water Hence, number of molecules in 18 g of water \[6.02\times {{10}^{23}}\] and 1.8 g of water contains =\[6.02\times {{10}^{22}}\] molecules
You need to login to perform this action.
You will be redirected in
3 sec
