How many grams does Avogadro's number of calcium atoms represent?

How many grams does Avogadro's number of calcium atoms represent?

• A. 20.1 grams
• B. 30.1 grams
• C. 40.1 grams
• D. 50.1 grams

Answer: (C)

Avogadro's number, which is approximately \(6.022 \times 10^{23}\), refers to the number of atoms present in one mole of a substance. To find the mass of Avogadro's number of calcium atoms in grams, you need to incorporate the molar mass of calcium. Calcium has a molar mass of approximately 40.1 grams per mole. This means that one mole of calcium atoms, which is Avogadro's number of calcium atoms, weighs about 40.1 grams. Therefore, when asking how many grams Avogadro's number of calcium atoms represents, the answer is directly linked to its molar mass, which is 40.1 grams. This reasoning is foundational in chemistry when determining the mass of a substance based on the number of moles, contributing to a better understanding of stoichiometry and the behavior of elements in reactions.

Avogadro's number, which is approximately (6.022 \times 10^{23}), refers to the number of atoms present in one mole of a substance. To find the mass of Avogadro's number of calcium atoms in grams, you need to incorporate the molar mass of calcium.

Calcium has a molar mass of approximately 40.1 grams per mole. This means that one mole of calcium atoms, which is Avogadro's number of calcium atoms, weighs about 40.1 grams. Therefore, when asking how many grams Avogadro's number of calcium atoms represents, the answer is directly linked to its molar mass, which is 40.1 grams.

This reasoning is foundational in chemistry when determining the mass of a substance based on the number of moles, contributing to a better understanding of stoichiometry and the behavior of elements in reactions.