Ammonia, NH3, is made in the direct reaction between nitrogen and hydrogen. If 280. grams of nitrogen are used, how many grams of hydrogen are also used?

The answer is 60 grams of hydrogen.

Explanation:

Assuming hydrogen is a non-limited substance, we can calculate the number of mols of nitrogen that are used.

Molar mass of N = 14 grams/mole

280g of N / (14 g / mol) = 20 mols of N

They react in a 1 to 3 ratio. For every 1 nitrogen atom, there are 3 hydrogen atoms.

The molar mass of hydrogen is 1 g / mol.

Because we have 20 mols of Nitrogen and we know we need three times the amount of hydrogen as we do nitrogen, there must be 60 mols of hydrogen.

60 * 1 = 60

The answer is 60 grams of hydrogen.

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oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).