Transcript Mass to Mole Mole to Mass Stoichiometry

Mass to Mole
Mole to Mass
Stoichiometry
Stoichiometry – Chapter 9 – Section 3
Mole to Mass Stoichiometry
• Uses both mole ratio and molar mass ratios.
• Must start with a balanced equation.
A sample problem
When magnesium burns in air, it combines with oxygen to
form magnesium oxide according to the following
equation:
2Mg + O2 → 2MgO
What mass in grams of magnesium oxide is produced
from 2.00 mol of magnesium?
Your turn!
What mass in grams of oxygen combines with 2.00 mol
of magnesium in this reaction?
2Mg + O2 → 2MgO
Mass to Mole Stoichiometry
How many moles of mercury(II) oxide, HgO, are needed
to produce 125 g of oxygen according to the
following equation.
2HgO→ 2Hg + O2
Your turn!
How many moles of mercury are produced
when 125 g of mercury oxide react according
to the following reaction.
2HgO→ 2Hg + O2
Homework
– Pg 305 7, 8, 11-15
– 1 worksheet
– Please do the bookwork on a separate sheet of
paper.
– You must show your work for full credit.
– Quiz on Thursday