Phosphorus Chemistry Concepts

The video tutorial explains how to find the molar mass of tetraphosphorus (P4), also known as white phosphorus. It begins with an introduction to the appearance of tetraphosphorus and then guides viewers through the process of calculating its molar mass using the periodic table. The molar mass of phosphorus is given as 30.97 grams per mole, and since there are four phosphorus atoms in P4, the total molar mass is calculated to be 123.88 grams per mole. The video concludes by summarizing the calculation and its significance.

What is another name for tetraphosphorus?

• Red phosphorus

• Black phosphorus

• Blue phosphorus

• White phosphorus

How many phosphorus atoms are present in a molecule of P4?

• 2

• 5

• 4

• 3

What is the atomic mass of phosphorus as found on the periodic table?

• 34.97

• 32.97

• 30.97

• 28.97

What is the molar mass of tetraphosphorus (P4)?

• 129.88 g/mol

• 120.88 g/mol

• 123.88 g/mol

• 126.88 g/mol

If you have 123.88 grams of P4, how many moles do you have?

• 2 moles

• 1.5 moles

• 1 mole

• 0.5 moles

What does the molar mass of a substance represent?

• The volume of one mole of the substance

• The mass of one mole of the substance

• The weight of one atom

• The number of atoms in a molecule