5. Classify the following solutions as saturated, unsaturated, or supersaturated (a) 75 g. KNO, in 100 g of H20 at 40°C
(b) 60 g. KNO3 in 100 g of H20 at 50°C
(c) 140 g. Kl in 100 g of H20 at 15°C
(d) 58 g. Kl in 100 g of H2O at 20°C
(e) 62 9. NH4Cl in 100 g of H20 at 70°C

- 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

it is the most commonly accepted one

a corroding iron, if that's one of your choices