Molar Mass of Iodine and I2

In this video, Dr. B explains how to calculate the molar mass of I2, iodine gas. The process begins by locating iodine on the periodic table to find its atomic mass, which is 126.90 grams per mole. Since I2 consists of two iodine atoms, this value is multiplied by two, resulting in a molar mass of 253.80 grams per mole. Dr. B notes that different periodic tables may have slight variations in atomic mass values, which could lead to different results. The video concludes with a reminder of these considerations.

What is the first step in calculating the molar mass of I2 iodine gas?

• Calculate the density of iodine.

• Determine the number of protons in iodine.

• Locate iodine on the periodic table.

• Find the atomic number of iodine.

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

• 126.90 grams per mole

• 127.00 grams per mole

• 128.00 grams per mole

• 125.90 grams per mole

How do you calculate the molar mass of I2 from the atomic mass of iodine?

• Divide the atomic mass of iodine by two.

• Add the atomic mass of iodine to itself.

• Multiply the atomic mass of iodine by two.

• Subtract the atomic mass of iodine from itself.

What is the calculated molar mass of I2 iodine gas?

• 254.80 grams per mole

• 127.80 grams per mole

• 253.80 grams per mole

• 126.90 grams per mole

Why might your calculated molar mass differ slightly from the one in the video?

• Different periodic tables may have varying atomic masses.

• Different periodic tables may have varying atomic numbers.

• Different periodic tables may have varying electron configurations.

• Different periodic tables may have varying chemical symbols.