Question

A 10 centimetre cube sample of human urine was found to have 5 milligrams of Urea on analysis .Calculate the molarity of the given sample with respect to urea.

Answer 1

Molarity can be defined as follows:

                             $=\frac{Number of moles of urea}{volume of solution}$

Here, we have 5 mg of urea  

molar mass of urea =60 mg  mol⁻¹

Number of moles of urea=$\frac{5}{60}$

Volume of solution=10 cm³=10 mL

So,  

Molarity can be defined as follows:

                                                          =$\frac{5}{60\times 10}$

                                                           =0.0083 M

Answer 2

Answer:

the above answer given by someone is wrong as he or she take molar mass of urea =60 mg per mole but its 60 g per mole or if u want to take molar mass in mg then it will be 0.06 g..

i hope u will understand the mistake that i will tell u.....