Question

Calculate the precise Molar Mass of NH3 and calculate the moles in 50.0
grams.

Answer 1

Answer: Molar mass of
`NH_3` is 17.00 g and moles in 50.0 grams is 2.94.

Step-by-step explanation:

Molar mass is defined as the mass in grams of 1 mole of a substance.

S.I Unit of Molar mass is gram per mole and it is represented as g/mol.

Atomic Mass of Nitrogen (N) = 14.00 g

Atomic Mass of Hydrogen (H) = 1.00 g

Molar mass of
`NH_3` = 1(14.00)+3(1.00) g = 17.00 g

According to avogadro's law, 1 mole of every substance contains avogadro's number
`6.023* 10^(23)` of particles and weigh equal to its molecular mass.

To calculate the moles, we use the equation:

`\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}`

`\text{Number of moles of }NH_3==(50.0g)/(17.00g/mol)=2.94moles`