Asolution is prepared by dissolving 4.66 g of kcl in enough distilled water to give 250 ml of solution. kcl is a strong electrolyte. how will the freezing point of the solution be different from that of pure water?

Answer : The solution will be  lower than water.

Explanation :  Given,

Molal-freezing-point-depression constant for water =

Mass of KCl (solute) = 4.66 g

Volume of water = 250 mL

Density of water = 1.00 g/mL

So,

Mass of water (solvent) =

Molar mass of KCl = 74.5 g/mole

Formula used :  

where,

= change in freezing point

i = Van't Hoff factor = 2  (for KCl electrolyte)

= freezing point constant for water =

m = molality

Now put all the given values in this formula, we get

From this we conclude that, the solution will be  lower than water.

Therefore, the solution will be  lower than water.

- 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