What is the molar mass of chromium (Cr)?

The molar mass of an element is the mass of one mole of that element. The molar mass is numerically equivalent to the atomic weight of the element when expressed in grams per mole. The atomic weight of an element can be found on the periodic table and is given in atomic mass units (amu).

To find the molar mass of chromium (Cr), you would follow these steps:

1. Locate Chromium on the Periodic Table: Chromium is the chemical element with the symbol Cr and atomic number 24.

2. Find the Atomic Weight of Chromium: The atomic weight of chromium is approximately 51.9961 amu, as listed on the periodic table. This value represents the average mass of all the isotopes of chromium, weighted by their natural abundance.

3. Convert Atomic Weight to Molar Mass: Since the atomic weight is given in atomic mass units and the molar mass is expressed in grams per mole, the conversion is straightforward. One atomic mass unit is defined such that one mole of carbon-12 atoms has a mass of exactly 12 grams. Therefore, the atomic weight of chromium in amu is numerically the same as the molar mass of chromium in grams per mole.

Thus, the molar mass of chromium (Cr) is approximately 51.9961 grams per mole. This value is used in stoichiometric calculations in chemistry to convert between the mass of a substance and the amount of substance in moles.