Question

Which of these weighs most?
 A.$32g$ oxygen
 B.$2g$ atom of nitrogen
 C.$0.5mol$ of iron
 D.$3.01 \times {10^{23}}$ atoms of carbon

Answer 1

Hint: We have to know that molar mass is the mass of one mole of any substance. One mole of any animal group (atoms, particles, particles or particles) is that amount in number having a mass equivalent to its nuclear or atoms mass in grams. Molar mass is addressed by "M".

Complete answer:
For oxygen,
The sub-atomic mass of a component is characterized as the amount of the majority of the components present in the particle. Sub-atomic mass is acquired by duplicating the nuclear mass of a component with the quantity of iotas in the particle and afterward adding the majority of the multitude of components in the particle. The molar mass of oxygen is $32g$ .
For nitrogen,
The mass of one gram of nitrogen is $14g$ .
That means the mass of two gram of nitrogen is $28g$ .
For iron,
The atomic recipe for Iron is $Fe$ . The SI base unit for measure of substance is the mole. one mole is equivalent to one moles Iron, $56g$ .
Then, the $0.5mol$ of iron is calculated,
$0.5mol{\text{ }} \times {\text{ 56g = 28g}}$
Therefore, $0.5mol$ of iron is $28g$ .
For carbon,
By using Avogadro’s number, that is $6.022 \times {10^{23}}$ for one atom. Similarity, $3.01 \times {10^{23}}$ of atom of carbon is,
 $C = \dfrac{1}{2} \times 12 = 6$
Therefore, $3.01 \times {10^{23}}$ of carbon is $6g$ .
The most weight of the given compound is oxygen. Because oxygen has $32g$ . Remaining compounds are lower than oxygen.

Therefore, option (A) is correct.

Note:
We have to see that, oxygen is a vapid, unscented, boring gas vital for living creatures, being taken up by creatures, which convert it to carbon dioxide; plants, thus, use carbon dioxide as a wellspring of carbon and return the oxygen to the environment.