Mole ConceptHard
Question
The volume of one mole of water at 277 K is 18 ml. One ml of water contains 20 drops. The number of molecules in one drop of water will be (NA = 6 × 1023)
Options
A.1.07 × 1021
B.1.67 × 1021
C.2.67 × 1021
D.1.67 × 1020
Solution
Volume of 18 g of water is 18 mL. Hence, the mass of one drop of water =$\frac{1}{20}$= 0.05 g.
Number of water molecules in one drop $= \frac{0.05}{18} \times 6 \times 10^{23} = 1.67 \times 10^{21}$
Create a free account to view solution
View Solution FreeMore Mole Concept Questions
A 12 g sample of CH4 and C2H4 yielded 35.2 g of CO2 on complete oxidation. What was the mean molar mass of the original ...Two elements A and B combine to form compound X and Y. For the fixed mass of A, masses of B combined for the compounds X...A quantity of 23.6 g of succinic acid is dissolved in 500 ml of 0.1 M acetic acid solution. Assuming that neither acid i...For CuSO4·5H2O, which is the correct mole relationship?...Some bottles of colourless liquids were being labelled when the technicians accidentally mixed them up and lost track of...