Chemistry Final Exam Review

Front

Knowledge about what products are produced in a chemical reaction is obtained by

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laboratory analysis.

Front

A solid produced by a chemical reaction in solution that separates from the solution is called

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a precipitate.

Front

After the correct formula for a reactant in an equation has been written, the

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formula should not be changed.

Front

In writing an equation that produces hydrogen gas, the correct representation of hydrogen gas is

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H₂.

Front

According to the law of conservation of mass, the total mass of the reacting substances is

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always equal to the total mass of the products.

Front

A chemical equation is balanced when the

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same number of each kind of atom appears in the reactants and in the products.

Front

Which coefficients correctly balance the formula equation NH₄NO₂(s) → N₂(g) + H₂O(l)?

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1, 1, 2

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The equation AX → A + X is the general equation for a

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decomposition reaction.

Front

The reaction 2HgO(s) → 2Hg(l) + O₂(g) is a(n)

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decomposition reaction.

Front

Group 1 metals react with water to produce metal hydroxides and

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hydrogen.