Hesi A2 Chemistry Exam 2025
Questions and Answers 100% Pass
Mixture with uniform density throughout and no distinguishable coponents. -
✔✔Homogeneous Mixture
Mixture in which the components are readily distinguished. - ✔✔Heterogeneous
Mixture
A change in which the checmical composition of a substance remains the same. -
✔✔Physical Change
A change in which the chemical bonds are broken and reformed to create a new and
different substance. - ✔✔Chemical Change
The simplest of substances and is represented by a specific letter or combinations of
letters. - ✔✔Element
Combinations of eleements in whole number ratios. - ✔✔Compounds
Mass cannot be created or destroyed during a chemical reaction. - ✔✔Law of
Conservation of Mass
The breaking of bonds and the reforming of new bonds to create new chemical
compounds with different chemical forumulas and different chemical properties. -
✔✔Chemical Reaction
syntehesis, decomposition, combusion, single replacement, double replacement -
✔✔Five main types of chemical reactions.
Two elements combine to form a product. - ✔✔Syntehsis Reaction
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, The breaking of a compound into component parts. - ✔✔Decomposition Reaction
The reaction of a compound or element with oxygen. In the combusiton of a
hydrocarbon carbon dioxide and water are produced. - ✔✔Combustion Reaction
Reaction involoving ionic compounds. The reactivity of the ionic compounds
determines whether the reaction will take place or not. Can be single replacement or
double replacement reaction. - ✔✔Replacement Reactions
Reaction between a more active metal reacting with an ionic compound containing a
less active metal to produce a new compound ex. copper wire reacting with aqueous
silver nitrate. - ✔✔Single Replacement Reaction
Reaction involving two ionic compounds where the positive ion from one
compound combines with the negative ion of the other compound. The result it two
new ionic compounds that have switches partners. - ✔✔Double Replacement
Reaction
The number of protons in a given element. - ✔✔Atomic Number
An average of the masses of each of the iostopes of an element as they occur in
mature. (Represents the number of protons and the number of neutrons in an
element because electrons essentially have no mass). - ✔✔Atomic Weight/ Atomic
mass number
What group has a +1 charge - ✔✔IA
What group has a +2 charge - ✔✔IIA
What group has a +3 charge - ✔✔IIIA
Density of an object realtive to water - ✔✔Specific Gravity
Energy of motion - ✔✔Kinetic Energy
Stored energy - ✔✔Potential Energy
Form of energy, measured in calories - ✔✔Heat
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Questions and Answers 100% Pass
Mixture with uniform density throughout and no distinguishable coponents. -
✔✔Homogeneous Mixture
Mixture in which the components are readily distinguished. - ✔✔Heterogeneous
Mixture
A change in which the checmical composition of a substance remains the same. -
✔✔Physical Change
A change in which the chemical bonds are broken and reformed to create a new and
different substance. - ✔✔Chemical Change
The simplest of substances and is represented by a specific letter or combinations of
letters. - ✔✔Element
Combinations of eleements in whole number ratios. - ✔✔Compounds
Mass cannot be created or destroyed during a chemical reaction. - ✔✔Law of
Conservation of Mass
The breaking of bonds and the reforming of new bonds to create new chemical
compounds with different chemical forumulas and different chemical properties. -
✔✔Chemical Reaction
syntehesis, decomposition, combusion, single replacement, double replacement -
✔✔Five main types of chemical reactions.
Two elements combine to form a product. - ✔✔Syntehsis Reaction
COPYRIGHT © 2025 BY SOPHIA BENNETT, ALL RIGHTS RESERVED 1
, The breaking of a compound into component parts. - ✔✔Decomposition Reaction
The reaction of a compound or element with oxygen. In the combusiton of a
hydrocarbon carbon dioxide and water are produced. - ✔✔Combustion Reaction
Reaction involoving ionic compounds. The reactivity of the ionic compounds
determines whether the reaction will take place or not. Can be single replacement or
double replacement reaction. - ✔✔Replacement Reactions
Reaction between a more active metal reacting with an ionic compound containing a
less active metal to produce a new compound ex. copper wire reacting with aqueous
silver nitrate. - ✔✔Single Replacement Reaction
Reaction involving two ionic compounds where the positive ion from one
compound combines with the negative ion of the other compound. The result it two
new ionic compounds that have switches partners. - ✔✔Double Replacement
Reaction
The number of protons in a given element. - ✔✔Atomic Number
An average of the masses of each of the iostopes of an element as they occur in
mature. (Represents the number of protons and the number of neutrons in an
element because electrons essentially have no mass). - ✔✔Atomic Weight/ Atomic
mass number
What group has a +1 charge - ✔✔IA
What group has a +2 charge - ✔✔IIA
What group has a +3 charge - ✔✔IIIA
Density of an object realtive to water - ✔✔Specific Gravity
Energy of motion - ✔✔Kinetic Energy
Stored energy - ✔✔Potential Energy
Form of energy, measured in calories - ✔✔Heat
COPYRIGHT © 2025 BY SOPHIA BENNETT, ALL RIGHTS RESERVED 2
