Acompound has the percent composition 47.40% pd, 28.50% o, 21.40% c, and 2.69% h. based on this information, which molecular formulas could represent the compound?

- molecular formula is .

Solution:- Percentages are given from which we will calculate the moles of each element.

moles of Pd = = 0.445 mol Pd

moles of O = = 1.78 mol O

moles of C = = 1.78 mol C

moles of H = = 2.66 mol H

Now we divide the moles of each by the least one of them. The least one is 0.445. So, let's divide the moles of each by 0.445.

Pd = = 1

O = = 4

C = = 4

H = = 6

So, the molecular formula of the compound is .

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.