Which of the following weighs the most?(a) One g atom of nitrogen(b) One mole of water(c) One mole of sodium(d) One molecule of H2SO

To answer this question, we need to calculate the molar mass of each option:

(a) One g atom of nitrogen: Nitrogen has an atomic mass of approximately 14 g/mol. However, the question refers to a single atom, not a mole of atoms. Since 1 mole of any element contains approximately 6.022 x 10^23 atoms (Avogadro's number), one atom of nitrogen would weigh 14/6.022 x 10^23 g, which is a very small number.

(b) One mole of water (H2O): The molar mass of water is approximately 18 g/mol (1.01 g/mol for hydrogen and 16 g/mol for oxygen, and there are two hydrogens for every oxygen in water). So, one mole of water would weigh approximately 18 g.

(c) One mole of sodium (Na): Sodium has an atomic mass of approximately 23 g/mol. So, one mole of sodium would weigh approximately 23 g.

(d) One molecule of H2SO4: The molar mass of H2SO4 is approximately 98 g/mol (1.01 g/mol for hydrogen, 32 g/mol for sulfur, and 16 g/mol for oxygen, and there are two hydrogens, one sulfur, and four oxygens in H2SO4). However, the question refers to a single molecule, not a mole of molecules. So, one molecule of H2SO4 would weigh 98/6.022 x 10^23 g, which is also a very small number.

So, out of the given options, one mole of sodium (c) weighs the most.