Molar Mass and Atomic Structure

The video tutorial explains how to calculate the molar mass of sulfuric acid (H2SO4). It begins by identifying the atomic masses of hydrogen, sulfur, and oxygen from the periodic table. The instructor then calculates the contribution of each element to the total molar mass by multiplying the atomic mass by the number of atoms present in the compound. Finally, the contributions are summed to find the total molar mass of H2SO4, which is 98.09 grams per mole. The video concludes with a note on how rounding differences in periodic tables might affect the final result.

What is the atomic mass of hydrogen as mentioned in the video?

• 1.10 grams per mole

• 2.02 grams per mole

• 1.00 grams per mole

• 1.01 grams per mole

How many hydrogen atoms are present in a molecule of sulfuric acid?

• One

• Two

• Four

• Three

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

• 32.07 grams per mole

• 12.01 grams per mole

• 14.01 grams per mole

• 16.00 grams per mole

How many oxygen atoms are there in sulfuric acid?

• Two

• Three

• Four

• Five

What is the calculated molar mass of sulfuric acid?

• 100.09 grams per mole

• 98.09 grams per mole

• 96.09 grams per mole

• 94.09 grams per mole

Why might there be a slight difference in the calculated molar mass?

• Due to different periodic tables rounding to different decimal places

• Because sulfuric acid has a variable composition

• Because of incorrect atomic masses

• Due to a mistake in the calculation