Question

Raunak took 5 moles of carbon atoms in a container and Krish also took 5 moles of sodium atoms in another container of same weight. Whose container is heavier? Whose container has more number of atoms?​

Answer 1

Answer:

Solution : a) 1 mole= molar mass of a substance. Thus, Krish's container is heavier than Raunak's container. b) Here, both container have 5 moles of each carbon and sodium, therefore, both containers have equal number of atoms, i.e., 5×6.022×1023 atoms.

Explanation:

Since both the containers are of same mass so mass of atoms will decide which will be heavier.

Mass of 5 moles of sodium atoms in Krish's container =(5×23)g=115g

Mass of 5 moles of carbon atom in Raunak's container =(5×12)g=60g.

∴ Krish's container is heavier.

Hence the correct option is A.

Answer 2

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Number of moles of carbon in Raunak's container = 5 mol

Weight of 1 mol of carbon atoms = 12

Now , Weight of 5 moles of carbon atoms = 12 × 5 = 60 g

Number of moles of sodium in krish's container = 5 moles

Weight of 1 mol of Sodium = 23 g

Now , Weight of 5 moles of sodium = 23 × 5 = 115 g

By observing the above calculations . We can say that Krish's container is heavier compared to Raunak's container.

And Now ,Coming to the number of atoms ;

Product of number of moles of substance and avogadro number (6.023×10²³) gives the number of atoms in that substance.

The number of moles of both taken atoms is same. So , Number of atoms will also be same.

Hence ,

• Krish's container is heavier compared to Raunak's container and Number of atoms present in both containers is same.