Molar Mass and Chemical Formulas

The video tutorial explains how to calculate the molar mass of C7H16, which could be heptane or another isomer. It begins by identifying the atomic mass of carbon and hydrogen from the periodic table. The tutorial then demonstrates how to multiply the atomic mass of carbon by the number of carbon atoms and the atomic mass of hydrogen by the number of hydrogen atoms. These values are added together to find the total molar mass of C7H16, which is 100.23 grams per mole. The video concludes by explaining the significance of this calculation in terms of moles and grams.

What is the chemical formula for heptane?

• C8H18

• C5H12

• C6H14

• C7H16

How many carbon atoms are present in C7H16?

• 8

• 6

• 7

• 5

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

• 12.01 g/mol

• 14.01 g/mol

• 1.01 g/mol

• 16.00 g/mol

How many hydrogen atoms are in the compound C7H16?

• 14

• 16

• 12

• 18

What is the molar mass of C7H16 as calculated in the video?

• 98.12 g/mol

• 102.34 g/mol

• 104.45 g/mol

• 100.23 g/mol

What does the molar mass of 100.23 g/mol for C7H16 signify?

• It is the mass of one atom of C7H16.

• It is the mass of one mole of C7H16.

• It is the mass of one molecule of C7H16.

• It is the mass of one liter of C7H16.