Question

Which one of following weighs more
A. One gram atom of nitrogen.
B. One mole of sodium.
C. One mole of water.
D. One molecule of H2SO4.

Answer 1

Answer:

one molecule of H2SO4.

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Answer 2

Answer:

The correct option is (B) One mole of sodium.

Explanation:

Option A: One gram atom of nitrogen

There is only 1g of nitrogen atoms.

Option B: One mole of sodium

Convert moles to mass by multiplying molar mass by moles given.

Molar mass of sodium- 23g/mol

$23 * 1 = 23g$

There is 23g of sodium.

Option C: One mole of water

Convert moles to mass by multiplying molar mass by moles given.

Molar mass of water- 18g/mol

$18 * 1 = 18g$

There is 18g of water.

Option D: One molecule of $H_{2}SO_{4}$

Mass of one molecule of sulphuric acid is-

$\frac{98}{6*10^{23} } = 1.6 * 10^{-22}g$ of sulphuric acid

Conclusion:

One mole of sodium has the greatest mass.