Chemistry Cumulative Exam Review
Questions And Answers 100% Pass
Which of these properties is the best one to use for identification of an element?
the number of neutrons in the atomic nucleus
the number of protons in the atomic nucleus
the number of isotopes that are formed by the element
th...
Chemistry Cumulative Exam Review
Questions And Answers 100% Pass
Which of these properties is the best one to use for identification of an element?
the number of neutrons in the atomic nucleus
the number of protons in the atomic nucleus
the number of isotopes that are formed by the element
the number of charges on ions of the element - answer✔B. the number of protons in the atomic
nucleus
Which characteristic best identifies an Arrhenius base?
It must donate electrons to form a covalent bond.
It must accept protons from an acid.
It must generate hydroxide ions in water.
It must form a conjugate acid after reacting. - answer✔C. It must generate hydroxide ions in
water.
How are isotopes defined?
forms of different elements that have the same number of neutrons in each atom
forms of different elements that have the same number of protons in each atom
forms of the same element that differ in the number of neutrons in each atom
forms of the same element that differ in the number of protons in each atom - answer✔C. forms
of the same element that differ in the number of neutrons in each atom
According to Le Chatelier's principle, a change in pressure affects the chemical equilibrium of
the reaction system under what condition?
The reactants and the products are in the solid phase.
The reactants and the products are in the liquid phase.
Some of the reactants or the products are in the gaseous phase.
Some of the reactants or the products are solid, and some are liquid. - answer✔C. Some of the
reactants or the products are in the gaseous phase.
Which effect is one likely result of a forest fire?
extinction
adaptation
speciation
forced migration - answer✔I think it's D. forced migration
Which example is a long-term environmental change?
La Niña
El Niño
climate change
small asteroid impact - answer✔C. climate change
Which of these equations correctly expresses the self-ionization of water?
H2O+H3O+ <--> H2O+OH-
H2O+H2O <--> 2OH-
H2O+H2O <--> 2H3O+
H2O+H2O <--> H3O+ + OH- - answer✔D. H2O+H2O <--> H3O+ + OH-
The molar mass of KCl is 74.55 g/mol. If 8.45 g KCl are dissolved in 0.750 L of solution, what
is the molarity of the solution?Use .
0.113 M
0.151 M
6.62 M
11.3 M - answer✔B. 0.151 M
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