5 moles of A B 2 weigh 125 × 10 - 3 k g and 10 moles of A 2 B 2 weigh 300 × 10 - 3 k g . The molar mass of A ( M A ) in k g m o l - 1 are:

Mass of 1 mole of A B 2 = 125 × 10 - 3 k g 5 = 125 g m 5 = 25 g m Similarly, mass of 1 mole of A 2 B 2 = 300 × 10 - 3 k g 10 = 30 g m Let molar mass of A is x and B is y

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ChemistryMole ConceptMiscellaneous/MixedMedium2 minPYQ_2019

ChemistryMediumassertion reason

$5$ moles of $A B_{2}$ weigh $125 \times 10^{- 3} k g$ and $10$ moles of $A_{2} B_{2}$ weigh $300 \times 10^{- 3} k g$ . The molar mass of A $(M_{A})$ in $k g {m o l}^{- 1}$ are:

Question diagram: 5 moles of A B 2 weigh 125 × 10 - 3 k g and 10 moles of A 2

Options:

Answer:

Solution:

Mass of 1 mole of ${A B}_{2} = \frac{125 \times 10^{- 3} k g}{5} = \frac{125 g m}{5}$
$= 25 g m$

Similarly, mass of $1$ mole of $A_{2} B_{2} = \frac{300 \times 10^{- 3} k g}{10} = 30 g m$

Let molar mass of $A$ is $x$ and $B$ is $y$

Stream:JEESubject:ChemistryTopic:Mole ConceptSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2019

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