Molecular Weight and Atomic Structure

Dr. B explains how to calculate the molecular weight of N2O. First, find nitrogen on the periodic table, which has a weight of 14.01 g/mol. Since N2O contains two nitrogen atoms, multiply this by 2. Add the weight of oxygen to find the total molecular weight of N2O, which is 44.0 g/mol. The video emphasizes the importance of including units in calculations.

What is the atomic weight of nitrogen as found on the periodic table?

• 14.01 G per mole

• 16.00 G per mole

• 12.01 G per mole

• 18.02 G per mole

How many nitrogen atoms are present in a molecule of N2O?

• Four

• Three

• Two

• One

What operation is performed to account for the two nitrogen atoms in N2O?

• Addition

• Subtraction

• Division

• Multiplication

What is the molecular weight of N2O after completing the calculation?

• 44.0 G per mole

• 46.02 G per mole

• 30.01 G per mole

• 28.02 G per mole

Why is it important to include units when stating the molecular weight?

• To make it look scientific

• To ensure clarity and accuracy

• To follow a tradition

• To confuse the reader