Term
A solid produced by a chemical reaction in solution that separates from the solution is called
A. a precipitate
B. condensate
C. the mass of the product
D. a molecule
E. a reactant |
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Which of the following compounds could be identified as a precipitate in an aqueous solution?
A. potassium bromide
B. barium iodide
C. lead (II) nitrate
D. nickel phosphate
E. calcium nitrate |
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Term
Penelope decided to combine methanol (CH30H) and a trace amount of oxygen gas in a soda bottle and ignited the combinations with a flame. What are the products formed in the bottle from the reaction?
A. carbon dioxide, hydrogen hydroxide, and carbon monoxide
B. carbon tetrahydride and water
C. no reaction occured, so no products formed
D. carbon dioxide and hydrogen hydroxide
E. the products cannot be predicted for this type of reaction |
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Term
Aluminum bromide + chlorine react to produce
A. AlBrCl
B. AlCl3 and Br2-
C. Al and BrCl2
D. nothing - there is no reaction
E. AlCl and Br2- |
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Term
What evidence of a chemical change would be observed in a reaction where an active free metal replaces hydrogen in water?
A. a precipitate
B. bubbles
C. no reaction
D. a color change
E. a decrease in entropy |
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Term
In the reaction Mg + 2AgCl -> MgCl2 + 2Ag
, AgCl is more likely a
A. solid crystal reacting with magnesium
B. a liquid reacting with magnesium
C. a gaseous sample that reacts with magnesium
D. an aqueous solution that reacts with magnesium
E. a compound that does not react with magnesium |
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Term
Ag-109 has 62 neutrons. That neutral atom has
A. 47 neutrons
B. 53 protons
C. 40 protons
D. 47 protons
E. 62 electrons |
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Term
The substance whose Lewis structure shows two covalent bonds is
A. H2O
B. HCl
C. CCl4-
D. NH3-
E. CH2Cl2- |
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Definition
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Term
What can be predicted by using a solubility chart?
A. the melting points of elements
B. the amount of energy released by chemical reaction
C. the electronegativity values of elements
D. whether a double replacement chemical reaction will occur
E. whether a single replacement reaction will occur |
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