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Relationship between Vapor Density & Relative Molecular Mass

In which case...

Question

In which case, purity of the substance is $100$ ?

1

mole of

C a C O_{3}

gave

11.2

C O_{2}

(at

S T P

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1

mole of

M g C O_{3}

gave

40.0

M g O

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1

mole of

N a H C O_{3}

gave

4

H_{2} O

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1

mole of

C a (H C O_{3})_{2}

gave

1

mole

C O_{2}

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Solution

The correct option is B $1$ mole of $M g C O_{3}$ gave $40.0$ g $M g O$ .
Assuming all are $100$ % pure, then
$1$ mole of $C a C O_{3}$ should give $22.4$ L $C O_{2}$ (at $S T P$ ).
$1$ mole of $M g C O_{3}$ should give $40.0$ g $M g O$ .
$1$ mole of $N a H C O_{3}$ should give $9$ g $H_{2} O$ .
$1$ mole of $C a (H C O_{3})_{2}$ should give $2$ moles $C O_{2}$ .
Hence, option B is correct.

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In which case, purity of the substance is 100?

The correct option is B 1 mole of MgCO3 gave 40.0 g MgO.Assuming all are 100% pure, then1 mole of CaCO3 should give 22.4 L CO2 (at STP).1 mole of MgCO3 should give 40.0 g MgO.1 mole of NaHCO3 should give 9 g H2O.1 mole of Ca(HCO3)2 should give 2 moles CO2.Hence, option B is correct.

In which case, purity of the substance is $100$ ?