Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptExpetimental Determination of Atomic Mass/Molecuair massMedium2 minQB

ChemistryMediumnumerical

A regular cube of metal measures exactly 10 cm on an edge and has density 8g/cc. If the cube contains 6 × $1 0^{25}$ atoms of the metal, determine atomic weight of metal ? (take $N_{A} = 6 \times 1 0^{23}$ )

Answer:

80.00

Solution:

Volume of cube = $1 0^{3} = 1000 c m^{3}$ , hence mass = $8 \times 1000 = 8000 g$ .

Number of moles of atoms = $\frac{6 \times 1 0 ^{25}}{6 \times 1 0 ^{23}} = 100 m o l$ .

Atomic mass = $\frac{M a ss}{M o l es}$

$= \frac{8000}{100} = 80 g m o l^{- 1}$

Atomic weight = $80$

Stream:JEESubject:ChemistryTopic:Mole ConceptSubtopic:Expetimental Determination of Atomic Mass/Molecuair mass

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...