Calculate the number of moles in 17g of h2o2

Asked by admin @ 23/08/2021 in Chemistry viewed by 404 People

Calculate the no of moles in 17g of H2O2.

Answered by admin @ 23/08/2021

Number of moles = $\frac{Given\:Mass}{Molar\:Mass}$

Given mass = 17g (Given in Question)

Q. What is Molar mass?

⇒ Total mass of each atom in that compound i.e. the mass of a given substance divided by the amount of substance.

The base SI unit for molar mass is kg/mol. (Note It's not mole, Its mol here because, In Formula we use mol.)

Molar Mass = H₂O₂ = $1u \times 2 + 16u \times 2$

Molar mass = 2 + 32 u

Molar mass = 34 u.

Putting the values in formula,

We get ;

Number of moles = $\frac{Given\:Mass}{Molar\:Mass}$

⇒ Number of moles = $\frac{17}{34}$

⇒ Number of moles = $\frac{1}{2}$ moles.

⇒ Number of moles = 0.5 moles

Thanks!

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