Question

What is the molar mass of diazepam (valium) if 0.05570 mol has a mass of 15.86 g?

Answer 1

Step-by-step explanation:

It is known that number of moles of a substance equals mass divided molar mass of the substance.

Mathematically, No. of moles =
`\frac{mass}{\text{molar mass}}`

It is given that number of moles of diazepam (valium) is 0.05570 mol and its mass is 15.86 g.

Therefore, molar mass of diazepam (valium) will be calculated as follows.

No. of moles =
`\frac{mass}{\text{molar mass}}`

0.05570 mol =
`\frac{15.86 g}{\text{molar mass}}`

molar mass = 284.74 g

Thus, we can conclude that the molar mass of diazepam (valium) if 0.05570 mol has a mass of 15.86 g is 284.74 g.

Answer 2

M.Mass = 284.74 g.mol⁻¹

Solution:

Data Given;

Mass = 15.86 g

Moles = 0.05570

Formula Used;

Moles = Mass ÷ M.Mass ∴ M.Mass = Molar Mass

Solving for M.Mass,

M.Mass = Mass ÷ Moles

Putting Values,

M.Mass = 15.86 g ÷ 0.05570 mol

M.Mass = 284.74 g.mol⁻¹