How many moles of Na are needed to produce 4 moles of NaCl in the

reaction below?

2 Na + Cl2 --> 2 Naci

Select one:

4 moles of Na are needed to produce 4 moles of NaCl

Explanation:

The balanced chemical equation is :

According to stoichiometry :

2 moles of are formed from = 2 moles of

Thus 4 moles of will be formed from =  of

Thus 4 moles of Na are needed to produce 4 moles of NaCl

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.