Question

For the reaction, calculate how many moles of the product form when 0.046 mol of O2 completely reacts.

Assume that there is more than enough of the other reactant.
2Ca(s)+O2(g)→2CaO(s)
Express your answer using two significant figures.

Answer 1

Answer: 0.023 moles of CaO.

Step-by-step explanation:

The balanced equation tells us that we'll get 2 moles of CaO for every one mole of O2. Since we have 0.046 moles of O2, we'll get 0.023 moles of CaO. (2 sig figs)