Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptAtomic mass/Average Atomic Mass/Average Molecular MassMedium2 minQB

ChemistryMediumsingle choice

Passage / Comprehension

An equal number of atoms are contained in one gram-atom of each element, and the same number of molecules is found in one gram-molecule of any compound. The terms gram atomic weight and gram molecular weight refer to a fixed number (Avogadro's number, $6.022 \times 1 0^{23}$ ) of particles. The term mole stands for the amount of material that contains this number of particles.

If 12 g of $C^{12}$ has equal number of atoms as Avogadro's number what mass of $_{2}^{4} He^{2 +}$ will contain same number of atoms -

Options:

Answer:

Solution:

mass of $C^{12} \to 1$ mole

1 mole of $C^{12}$ contains $N_{A}$ atoms

So, for 1 mole $_{2}^{4} He^{+ 2}$ it contains $N_{A}$ atoms.

i.e. 4 g .

Stream:JEESubject:ChemistryTopic:Mole ConceptSubtopic:Atomic mass/Average Atomic Mass/Average Molecular Mass

⏱ 2mℹ️ Source: QB

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