Question

How many moles of chlorine gas (Cl2) would react with 5 moles of sodium (Na) according to the following chemical equation: Na + Cl2 --> NaCl?

Answer 1

`"2.5 mol Cl"_2"` will react with `"5 mol Na"`.

Explanation:

Balanced Equation

`"2Na(s)" + "Cl"_2("g")` `rarr` `"2NaCl(s)"`

Multiply the given moles of `"Na"` times the mole ratio `(1"mol Cl"_2)/(2"mol Na")` from the balanced equation.

`5cancel"mol Na"xx(1"mol Cl"_2)/(2cancel"mol Na")="2.5 mol Cl"_2"`