Discussion
Which one among the following is the heaviest
Answer: C
One mole of sodium atoms is the heaviest, at 23 g.
A mole of anything is \(6.022\times10^{23}\) particles, so the mass is simply the molar mass: water 18 g, ammonia 17 g, sodium 23 g, hydrogen \((\mathrm{H_2})\) 2 g.
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