HESI A2 CHEMISTRY EXAM 150+ QUESTIONS. CORRECT ANSWERS!
GRADED! DETAILED!
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
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
GRADED! DETAILED!
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
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
