Stoichiometry Review LPHS Question Preview (ID: 17828)


Questions Including, Mole Review, Stoichiometry And Limiting Reactants. TEACHERS: click here for quick copy question ID numbers.

Using the balanced equation 3 HCl + 1 Al(OH)3 -- 3 H2O + 1 AlCl3, how many molecules of hydrochloric acid will react with 12.5 grams of aluminum hydroxide?
a) 0.48 molecules HCl
b) 5.13x10^23 molecules HCl
c) 2.89x10^23 molecules HCl
d) 3.22x10^22 molecules HCl

What is the molar mass of Na2SiO3?
a) 99.07 g Na2SiO3 = 1 mole Na2SiO3
b) 122.04 g Na2SiO3 = 1 mole Na2SiO3
c) 67.06 g Na2SiO3 = 1 mole Na2SiO3
d) 178.23 g Na2SiO3 = 1 mole Na2SiO3

The chemical that is used up first in a chemical reaction is known as ...
a) excess reactant
b) limiting reactant
c) surplus reactant
d) restricting reactant

Usingthe following balanced equation, 1 Fe3O4 + 4 CO -- 3 Fe + 4 CO2, how many moles of iron will be produced when 6 moles of carbon monoxide are reacted with Fe3O4?
a) 8.0 moles Fe
b) 1.5 moles Fe
c) 6.0 moles Fe
d) 4.5 moles Fe

To solve problems in the stoichiometry unit, we use a method called ...
a) geometry
b) guess check
c) dimensional analysis
d) cross multiplication

What are the coefficients when the following equation is balanced? Mg + H3PO4 --- Mg3(PO4)2 + H2
a) 3, 2, 1, 3
b) 6, 4, 1, 6
c) 4, 3, 2, 3
d) 6, 4, 1, 6

What is the limiting reagent when 65 grams of iron and 130 grams of chlorine gas react? 2 Fe + 3 Cl2 -- 2 FeCl3
a) Cl
b) Fe
c) Cl2
d) FeCl3

What is the mass of 7.29x10^24 molecules of iodine gas?
a) 3073.4 g iodine gas
b) 1536.7 g iodine gas
c) 1736.8 g iodine gas
d) 3373.2 g iodine gas

How many grams of iron (III) chloride is produced when 24 g iron and 37g chlorine gas react? 2 Fe + 3 Cl2 -- 2 FeCl3
a) 69.7 g FeCl3
b) 54.9 g FeCl3
c) 56.4 g FeCl3
d) 84.6 g FeCl3

If 3.4 g Copper react with silver nitrate, how many moles of silver will be produced? 1 Cu + 2 AgNO3 --- 1 Cu(NO3)2 + 2 Ag
a) 11.54 moles Ag
b) 0.054 moles Ag
c) 13.4 moles Ag
d) 0.11 mole Ag

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