What are some economic impacts of calcium?

Vitamin D, phosphorus, potassium, protein, sodium, caffeine

Calcium is often used in production of chemicals (obvious answer).

A better answer would be some specific ones.

One is that calcium carbonate is useful in building houses as it is cheap to make and has properties that make it good for insulation.  Its also used to make many things such as cement or lime.

8.7 degrees celsius and 15.6 degrees fahrenheit

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.