Stoichiometry Examples

H$_2$SO$_4$ + 2 KOH $\longrightarrow$ 2 H$_2$O + K$_2$SO$_4$

How many moles of KOH are requred to make 3.0 moles of K$_2$SO$_4$ ?

N$_2$ + 3 H$_2$ $\longrightarrow$ 2 NH$_3$

If 5 moles of N$_2$ react with excess H$_2$ how many moles of NH$_3$ will the reaction yield?

2 Na + Cl$_2$ $\longrightarrow$ 2 NaCl

How many grams of Cl$_2$ are needed to react completely with 12.0 g of Na?

The theoretical yield for a reaction is 627.0 g of SF$_6$. An experiment only yields 627.8g. What is the percent yield?