Question

In one experiment a student determined that 2.207 grams of an unknown had a volume of 8.85 mL. If the molar mass of the unknown was 116.25 g/mol, what was the molar volume (in mL) of the unknown?

Answer 1

To find the molar volume of the unknown substance, divide the volume by the number of moles of the substance using its mass and molar mass. In this case, the molar volume of the unknown substance is 465 mL/mol.

Step-by-step explanation:

The molar volume of a substance is the volume occupied by one mole of that substance at a specific temperature and pressure. To find the molar volume of the unknown substance, we can use the given mass and volume of the substance and the molar mass of the unknown substance.

First, calculate the number of moles of the unknown substance using its mass and molar mass. Then, divide the volume by the number of moles to find the molar volume.

In this case, the mass of the unknown is 2.207 grams, and the volume is 8.85 mL. The molar mass of the unknown is 116.25 g/mol.

Step 1: Calculate the number of moles of the unknown:

Moles = Mass / Molar mass

Moles = 2.207 g / 116.25 g/mol = 0.019 moles

Step 2: Calculate the molar volume:

Molar volume = Volume / Moles

Molar volume = 8.85 mL / 0.019 moles = 465 mL/mol