MASS: generally a measure of an object's resistance to changing its state of motion when a force is applied. It is determined by the strength of its mutual gravitational attraction.
Molecular mass or molecular weight is the mass of a molecule.
Gram formula mass (a.k.a. molar mass) is defined as the atomic mass of one mole of an element, molecular compound or ionic compound. The answer must always be written with the unit g/mol (grams per mole).
If not in use dispose it or when you need keep it from children
A chemical reaction occurred because calcium oxide has different properties than calcium and diatomic oxygen. The correct option is A.
<h3>What are chemical reactions?</h3>
A chemical reaction is said to occur when the chemical properties of substances change during the course of the reaction.
From the illustration, the chemical properties of calcium oxide are unique from that of calcium and oxygen. Thus, calcium oxide has become a new substance entirely.
Once a reaction leads to the formation of new substances, such a reaction is a chemical reaction.
More on chemical reactions can be found here: brainly.com/question/22817140
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