Molar Mass Calculations for Oxygen

The video tutorial explains how to calculate the molar mass of O2. It begins by identifying the atomic mass of oxygen from the periodic table, which can vary slightly depending on the table used. The tutorial demonstrates the calculation by multiplying the atomic mass by the subscript in the chemical formula, resulting in the molar mass in grams per mole. It also addresses the importance of using the correct number of decimal places and provides an example with an alternative atomic mass value. The video concludes with a reminder to check the required precision for decimal points.

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

• 15.99

• 15.98

• 16.00

• 16.01

How do you calculate the molar mass of O2 using the atomic mass?

• Multiply the atomic mass by the subscript

• Add the atomic mass twice

• Subtract the atomic mass from the subscript

• Divide the atomic mass by the subscript

What is the molar mass of O2 when using an atomic mass of 16.00?

• 33.00 grams per mole

• 34.00 grams per mole

• 31.00 grams per mole

• 32.00 grams per mole

If the atomic mass of oxygen is 15.994, what is the molar mass of O2?

• 32.988 grams per mole

• 32.000 grams per mole

• 31.988 grams per mole

• 31.000 grams per mole

Why is it important to check the number of decimal places in the atomic mass?

• It affects the color of the element

• It changes the element's state

• It influences the molar mass calculation

• It alters the element's symbol