AnswersChemistryChemical Reactions and Stoichiometry

Practice Test Answers

14 verified answers
3

A chemical equation can be used to solve stoichiometry problems provided that it

A
includes the state of matter after each substance.
B
indicates that reactants are in the gas phase and are not solids or liquids.
C
indicates only the forward reaction and not the reverse.
D
includes the coefficients that are needed for balancing the equation.
5

Which statement best explains the purpose of using a mole in the measurement of matter?

A
It allows chemists to deal with a large number of atoms.
B
It is commonly used as another unit of mass.
C
It is used only for studying the properties of gases.
D
It explains that substances with the same moles have the same mass.
8

Sodium combines with water to produce sodium hydroxide and hydrogen gas. Which word equation represents this violent reaction?

A
sodium hydroxide plus water rightarrow sodium plus hydrogen
B
sodium plus sodium hydroxide rightarrow water plus hydrogen
C
sodium plus hydrogen rightarrow sodium hydroxide plus water
D
sodium plus water rightarrow sodium hydroxide plus hydrogen
10

Consider the substance. 1 mol of beryllium 1 mol of salt 1 mol of water 1 mol of hydrogen Which statement is true about these substances?

A
They have the same number of atoms.
B
They have different numbers of particles.
C
They have exactly the same mass.
D
They have different masses.

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Practice Test Answers — Chemistry