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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» 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) |
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