Describe in detail how to prepare 500 ml of a 2.5 m calcium chloride solutiion

No. of moles of calcium chloride = molarity × volume of solution in L

No. of moles of calcium chloride = 2.5 ×0.5 = 1.25 mole

No. of moles of calcium chloride = mass of calcium chloride / molar mass of calcium chloride

1.25 mole = mass of calcium chloride / 110.98 g/mol

mass of calcium chloride = 1.25 ×110.98 = 139 g

the maximum mass of nh3 is nh3 in grams

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.