How many grams of calcium oxide is formed when 30 g of calcium interacts with oxygen?

Calcium reacts with oxygen to oxidize. This reaction is described by the following equation:

Ca + ½ O2 = CaO;

When the reaction proceeds, one oxygen atom is attached to the calcium atom. During the reaction, one molecule of calcium oxide is synthesized.

Let’s determine the chemical (molar) amount of calcium.

We divide the available weight of elemental calcium by the weight of 1 mole of this substance.

M Ca = 40 grams / mol; N Ca = 30/40 = 0.75 mol;

The same amount of calcium oxide will be synthesized.

Let’s calculate its weight.

N CaO = 0.75 mol; M CaO = 40 +16 = 56 grams / mol; m CaO = 0.75 x 56 = 42 grams;