Question

6 gm of an element x combined with 16 gm of another element y to give 0.5 mole of a compound xy. What is the molecular mass of xy?

Answer 1

Answer :-

44 u

Explanation:-

Mass of element 'x' = 6g

Mass of element 'y' = 16g

Thus, total mass of compund xy :-

=> Mass of x + Mass of y

=> (16+6)g

=> 22g

Number of moles present = 0.5

We know that:-

∵ No of moles = Given mass/Molar mass

∴ Molar mass = Given Mass/No of moles

=> Molar mass = 22/0.5

=> Molar mass = 44g

We know that molecular mass of a compound is the molar mass in

'amu' or 'u'.

Thus, molecular mass of the compound 'xy' is 44u.

Some Extra Information:-

Molecular mass : The molecular mass of a substance is the sum of atomic masses of all the atoms in a molecule of the substance. It is therefore the relative mass of a molecule expressed in atomic mass units. (u)

Answer 2

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