Question

The weight of a substance that displaces 22.4 litre air at N.T.P correspond to

Answer 1

your complete question is -> The weight of a substance that displaces 22.4 Litre air at N.T.P correspond to

(A) Molecular mass.

(B) Empirical mass.

(C) Equivalent mass.

(D) All of the above.

answer : option (A) molecular mass.

explanation : we know, at NTP ( normal temperature and pressure) volume of one mole of an ideal gas is 22.4 Litre. so, the weight of a substance that displaces 22.4 Litre air at NTP correspond to molecular mass.

hence, option(A) is correct choice.

[ special points

• molecular mass is the sum of masses of atoms present in a molecule. for instance, molecular mass of CO2 = atomic mass of C+ 2 × atomic mass of O.
• molecule mass means mass of one mole of molecules. and one mole is equivalent to 6.022 × 10²³ molecules. so, mass of each molecule = molecular mass/6.022 × 10²³ ]

Answer 2

Answer:

Option A :- molar mass.

Explanation :

# The weight of substance that displace 22.4 L . Air at N.T.P is molecular weight .                                                                                                                                            

# This is because 1 mole of any substance occupies a volume of 22.4 L at N.T.P  .

# molecular mass is the sum of mases of atom present in a molecule . for instance , molecular mass of CO2 = atomic mass of C + 2 * atomic mass of O.

# molecule mass means mass of one mole of molecules and one one mole is equivalent to 6.022 * 10^23 molecules .

so , mass of each molecules =( molecular mass )/6.022*10^23.

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