As a final problem for the week snape thinks we should incorporate something from a previous week, hydrates perhaps. suppose we have a compound that is 4.330 % li, 22.10 % cl, 39.89 % o, and 33.69 % h2o. what is the compounds formula?

The  formula is =

Explanation:

% of Li = 4.330

Molar mass of Li = 6.941 g/mol

% moles of Li = = 0.62382

% of Cl = 22.10

Molar mass of Cl = 1.00784 g/mol

% moles of Cl = = 0.62336

% of O = 39.89

Molar mass of O = 15.999 g/mol

% moles of O = = 2.49328

% of H₂O = 33.69

Molar mass of H₂O = 18.01528 g/mol

% moles of H₂O = = 1.87007

Taking the simplest ratio for Li , Cl, O, and H₂O as:

0.62382 : 0.62336 : 2.49328 :  1.87007

= 1 : 1 : 4 : 3

The  formula is =

- 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

b. th3 n4zc4 pl4t3 15 c0nv3rg1ng w1th the s0uth 4m3ric4n pl4t3.