Chemical Properties of Octane

The video tutorial explains how to calculate the molar mass of C8H18, commonly known as octane. It begins by identifying the atomic masses of carbon and hydrogen from the periodic table. The tutorial then demonstrates how to calculate the total molar mass by multiplying the atomic mass of carbon by eight and the atomic mass of hydrogen by eighteen. The final molar mass is calculated as 114.26 grams per mole, with a note on rounding differences based on periodic table versions.

What is the chemical formula for octane?

• C9H20

• C8H18

• C7H16

• C6H14

How many carbon atoms are present in C8H18?

• 12

• 10

• 8

• 6

What is the atomic mass of carbon as per the periodic table used in the video?

• 1.01

• 16.00

• 14.01

• 12.01

How many hydrogen atoms are in the compound C8H18?

• 16

• 18

• 22

• 20

What is the atomic mass of hydrogen used in the calculation?

• 1.01

• 2.02

• 12.01

• 14.01

What is the calculated molar mass of C8H18?

• 140.44 g/mol

• 100.18 g/mol

• 114.26 g/mol

• 128.34 g/mol