Chemistry- Types Of Reactions: Question Preview (ID: 24783)


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In a chemical reaction, the yields sign points to
a) the reactants b) the product c) the yields sign d)
Which of the following states the law of conservation of mass
a) atoms are rearranged in a reaction and join new molecules b) compounds form a new compound with different properties c) mass cannot be created or destroyed in a chemical reaction d) energy is neither created nor destroyed in a chemical reaction
If a chemical symbol in a chemical formula has no subscript, it means
a) the chemical symbol is written without any numbers b) the element has no charge c) the chemical is listed last in the formula d) only one atom of the element is in the molecule
Why does the law of conservation of mass dictate that chemical equations be balance?
a) because atoms are never gained or lost in a chemical reaction b) because elements are classified by weight c) because chemical formulas are written from left to right d) because using the wrong chemical symbol causes confusion
What happens to atoms in a chemical reaction?
a) They are sometimes lost, never rearranged. b) They are sometimes lost, gained or rearranged. c) They are never lost or gained, just rearranged. d) They are lost or gained, and never rearranged.
What is the chemical symbol for sodium?
a) NA b) Na c) S d) Sd
In a single displacement reaction,
a) a more reactive element can replace a less reactive element b) only metals and nonmetals can react c) a less reactive element can replace a more reactive element d) most often nonmetals are involved
What type of reaction is when an element replaces another element
a) decomposition b) synthesis c) double displacement reaction d) single displacement reaction
What type of reaction is when two substances combine to form a new compound?
a) synthesis b) decomposition c) single displacement d) double displacement
What type of reaction is when a substance breaks down into a new substance?
a) synthesis b) decomposition c) single displacement d) double dispacement
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