Question

Q16. (a) Write chemin formulae of all the conpounds that can be formed by the
combination of following ions:
Ca2+, K+, Fe3+, Cl-, SO42-
molar mass of Nitrogen is 14u. what will be the mass of one atom of
nitrogen in grams?
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Answer 1

A.

To form the compounds, I'm taking a positive and a negative anion, and then combining them by balancing the charges (net charge = 0).

$1. CaCl_{2}$

$2. KCl$

$3. FeCl_{3}$

$4. CaSO_{4}$

$5. K_{2}SO_{4}$

$6. Fe_{2}(SO_{4})_{3}$

For classes higher than 10th, more compounds exist, for instance, $K_{3}[FeCl_{6}]$.

B.

$14u = 14 * 1.67 * 10^{-24} g = 23.33 * 10^{-24} g = 2.33 * 10^{-23} g$