69g of sodium reacts with chlorine to produce sodium chloride. calculate the number of moles of chlorine required to react with exactly with the sodium

3 moles of is needed for to be fully consumed.

Explanation:

For the balanced equation:

                                   ⇒  

First, find the moles of Na corresponding to the 69g used the general definition of mol:

We observe that the equation is balanced and the stoichiometric ratio between them is 1: 1.

According to this, one mole of Na will react with one mole of Cl.

                3 moles of is needed for to be fully consumed.