# A student performed a laboratory activity where beryllium was reacted with hydrochloric acid. If they actually produced 4.5g of beryllium chloride, what was the percent yield?

Jan 25, 2017

Unknown..........

#### Explanation:

$\text{% yield}$ $=$ "Equivalence mass of product"/"Equivalent mass of reactant"xx100%.

You have a stoichiometric eqaution:

$B e \left(s\right) + 2 H C l \left(a q\right) \rightarrow B e C {l}_{2} \left(a q\right) + {H}_{2} \left(g\right)$.

And you have a mass of product.

You do not have molar quantities of the reactant...........