6.48 g of calcium hydrogencarbonate, Ca(HCO, was dissolved in water to make 500 cm of the solution. Which one of the following is the molarity
of the solution? (H=1; C =12: 0 = 16: Ca = 40)​

i think its 5049.

i hope this !

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.