Given that Ka for HOCN is 3.3 x 10^-4, what is Kb for OCN-

Kb(OCN⁻) = 3.03 X 10⁻⁴

Explanation:

Ka x Kb = Kw

3.3 x 10⁻⁴ x Kb = 1 x 10⁻14 => Kb = 1 x 10⁻¹⁴/3.3 x 10⁻4 = 3.03 x 10⁻¹¹

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

i think is conclusions.i think so