Physical Science, New York Edition

Chapter 21: Chemical Reactions

Section 1 Self-Check Quiz-Eng.

1.
A change in which one or more substances are converted into new substances is a __________ .
A)physical change
B)chemical reaction
C)nuclear reaction
D)chemical fusion
2.
New substances produced by a chemical reaction are __________ .
A)resultants
B)reactants
C)coefficients
D)products
3.
The law of conservation of mass states that __________ .
A)matter can be created and destroyed but does not change forms
B)in a chemical reaction, efforts should be made to preserve rare elements without changing them
C)in a chemical reaction, matter is not created or destroyed, but is conserved
D)in a chemical reaction, the final mass of the products is always greater than the starting mass of the reactants
4.
Ten grams of mercury(II) oxide react to produce 9.3 g of mercury and oxygen. What is the mass of the oxygen produced?
A)0.7 g
B)19.3 g
C)7.0 g
D)1.7 g
5.
__________ is a way to describe a chemical reaction using chemical formulas and symbols.
A)A chemical equation
B)Synthesis
C)A physical law
D)The law of conservation of matter
Physical Science - New York Edition
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