Correct Answer: (iii) 0.2 molL-1
Explanation: The Molarity is defined as the number of moles per volume of the solution in litres.
Given,
Mass = 5.85g
Molar mass = 58.5 g/mol
Volume of the solution = 0.5 L
So,
Number of moles = mass/molar mass
Number of moles =5.85/58.5
Number of moles =0.1 mol
Hence,
Molarity = 0.1/0.5
Molarity = 0.2mol/L