Which of the compounds – Chilean nitrate (NaNO3) or Indian nitrate (KNO3) is richer in nitrogen?

To solve this problem, we write down the given: NaNO3 and KNO3
Find: in which of the compounds the mass fraction of nitrogen is greater
Decision:
Let’s write down the formula for finding the mass fraction.
w = n * Ar / Mr
Let’s calculate the relative molecular weights of the salts.
Mr (NaNO3) = 23 + 14 + 16 * 3 = 85
Mr (KNO3) = 39 + 14 + 16 * 3 = 101
For nitrogen in both Chilean nitrate and Indian nitrate, the number n will be 1
Let’s substitute the data into the formula and make the calculation.
w (N) = 14/85 = 0.165 or 16.5%
w (N) = 14/101 = 0.386 or 38.6%
Thus, we find that the mass fraction of nitrogen is greater in Indian nitrate (KNO3)