Chemical Reactions And Stoichiometry Question Preview (ID: 40067)


Chemical Reactions Stoichiometry Unit Review. TEACHERS: click here for quick copy question ID numbers.

Nitrogen gas reacts with hydrogen gas to produce NH3. What is the mole ratio of hydrogen gas to NH3?
a) 1:2
b) 1:3
c) 2:3
d) 3:2

The general equation for a synthesis reaction is
a) AB produces A + B
b) AB + C produces AC + B
c) A + B produces AB
d) AB + CD produces AC + CD

The coefficients in a chemical equation
a) indicate the number of moles of each substance that react
b) show the number of grams of each substance that react
c) are the molar masses of the substances
d) show the valence electrons for each atom

In a chemical equation, the symbol (aq) indicates that the substance is
a) water
b) dissolved in water
c) an acid
d) insoluble

To balance a chemical equation, it is permissible to adjust the
a) coefficients
b) subscripts
c) formulas of the products
d) number of products

The production of a solid in a double displacement reaction results in the formation of a
a) gas
b) precipitate
c) combustion reaction
d) halogen

In the reaction A +B produces C + D, if there is more reactant B than is required to completely react with all of A, then
a) A is the limiting reactant
b) B is the limiting reactant
c) there is no limiting reactant
d) no product can be formed

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the
a) theoretical ield
b) percent yield
c) mole ratio
d) actual yield

Fewer steps are required to solve stoichiometry problems when the reactant is given in ___ and the product is desired in ____.
a) grams, grams
b) moles, moles
c) grams, liters
d) liters, number of atoms

The substance that is not completely used up in a chemical reaction is known as the
a) limiting reactant
b) excess reactant
c) theoretical reactant
d) actual reactant

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