Mass and Isotopes of Calcium

The video tutorial explains how to calculate the mass of one atom of calcium by using the molar mass and Avogadro's number. It demonstrates the conversion of molar mass to atomic mass and provides a step-by-step guide to finding the mass in grams and kilograms. Additionally, it covers how to calculate the mass of a calcium isotope, specifically calcium-44, using similar methods.

What is the first step in calculating the mass of a single calcium atom?

• Find the atomic number of calcium.

• Use the molar mass of calcium.

• Determine the number of protons in calcium.

• Calculate the density of calcium.

What is the molar mass of calcium used in the calculation?

• 20.4 g/mol

• 80.4 g/mol

• 40.8 g/mol

• 60.2 g/mol

What is Avogadro's number?

• 3.14 * 10^23

• 1.67 * 10^23

• 9.81 * 10^23

• 6.02 * 10^23

How do you convert the mass of a calcium atom from grams to kilograms?

• Add 1000

• Subtract 1000

• Multiply by 1000

• Divide by 1000

What is the mass of one calcium atom in grams?

• 6.02 * 10^-26 g

• 6.66 * 10^-23 g

• 6.66 * 10^-26 g

• 6.02 * 10^-23 g

Why is the mass of a single atom considered a very small number?

• Atoms are very large.

• Atoms are very small.

• Atoms are dense.

• Atoms have no mass.

What would you use to calculate the mass of a calcium-44 isotope?

• The average atomic mass of calcium

• The atomic number of calcium

• The specific atomic mass of calcium-44

• The density of calcium

How does the mass of a calcium-44 isotope differ from the average calcium atom?

• It is the same.

• It is unpredictable.

• It is heavier.

• It is lighter.