Calculate the concentration of 5g dextrose in molarity

Molarity of dextrose = 0.03 mol / L

Explanation:

Given data

mass of dextrose = 5 g

Concentration (Molarity) = ?

Solution

as mass is given so we find out number of moles

Moles = mass / molar mass

Molar mass of dextrose = 180.156 g/mol

Moles = 5 g / 180.156 g/mol

Moles = 0.03 moles

Now we find out molarity

Molarity = moles of solute / Litres of solution

As volume is not given so we suppose it as 1 L

Molarity of dextrose = 0.03 mol / 1 L

Molarity of dextrose = 0.03 mol / L

explanation:

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.