1.2 g of a substance $A$ is dissolved in $250 c m^{3}$ of the solution to give a 0.1 molar solution. What is the molar mass of the compound $A$ ?

g m o l^{- 1}

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g m o l^{- 1}

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g m o l^{- 1}

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None of these

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Solution

The correct option is D 48 $g m o l^{- 1}$
Given,
substance weight = 1.2g
solution= 250 cubic cm = 0.25 l
molarity = 0.1
we have to find the molar mass of a substance
molarity = mole /volume
$m o l e = m o l a r i t y * v o l u m e$
$g i v e n m a s s / m o l a r m a s s$ = $m o l a r i t y * v o l u m e$
$1.2 / m o l a r m a s s = 0.1 * 0.25$
molar mass = 48g/mole
molar mass of compound A is 48

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1.2 g of a substance A is dissolved in 250cm3 of the solution to give a 0.1 molar solution. What is the molar mass of the compound A?

1.2 g of a substance $A$ is dissolved in $250 c m^{3}$ of the solution to give a 0.1 molar solution. What is the molar mass of the compound $A$ ?