Q

The formula unit mass of CaO is _______.

RRB Group D, 12-Nov-18 S-2 2018
✓ Answer: B 56 u
The formula unit mass of CaO (Calcium Oxide) is 56u. This is calculated by adding the atomic masses of calcium (40.08u) and oxygen (15.999u). Calcium Oxide (CaO), also known as quicklime, is a white, caustic, alkaline crystalline solid at room temperature.
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