Name:__________________________________ Date:__________________ Class period:_____
U5 Stoich Particles and Volume WKSHT
Homework
!
Directions: Use dimensional analysis to perform the following calculations. Be sure to show
all of your work, include your units, and round your answers to the correct number of
significant figures.
1. How many formula units of sodium nitrate will react with 20.0 g of calcium carbonate to
product sodium carbonate and calcium nitrate according to the following reaction?
2 Na(NO3) + Ca(CO3)  Na2(CO3) + Ca(NO3)2
2. What volume of oxygen is produced at STP when 6.58 x 1024 molecules of water is
decomposed according to the following reaction?
2 H2O  2 H2 + O2
3. How many liters of nitrogen gas are needed to react with 90.0 g of potassium at STP in
order to produce potassium nitride according to the following reaction?
___ K + ___ N2  ___ K3N
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4. What mass of aluminum hydroxide are needed to decompose in order to produce 65.0 L
of water at STP according to the following equation?
_____ Al(OH)3

_____ Al2O3
+
_____ H2O
5. How many liters of propane(C3H8) are needed to react with 15.2 liters of oxygen at STP
in order to produce water and carbon dioxide?
Word equation:
Formula equation:
(Must be balanced!)
6. How many grams of barium chloride are produced when 1.25 x 1023 molecules of HCl
reacts with barium according to the following equation?
Word equation:
Formula equation:
(Must be balanced!)
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