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Hesi A2 ChemistryExam 60 Questions with Complete Answers. Mixture with uniform density throughout and no distinguishable coponents. - ANS Homogeneous Mixture Mixture in which the components are readily distinguished. - ANS Heterogeneous Mixture A change in which the checmical composition of a...

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  • December 6, 2024
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  • Hesi A2 Chemistry
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Hesi A2 Chemistry Exam 60 Questions with Complete
Answers.

Mixture with uniform density throughout and no distinguishable coponents. - ANS
Homogeneous Mixture


Mixture in which the components are readily distinguished. - ANS Heterogeneous
Mixture


A change in which the checmical composition of a substance remains the same. - ANS
Physical Change


A change in which the chemical bonds are broken and reformed to create a new and
different substance. - ANS Chemical Change


The simplest of substances and is represented by a specific letter or combinations of
letters. - ANS Element


Combinations of eleements in whole number ratios. - ANS Compounds


Mass cannot be created or destroyed during a chemical reaction. - ANS 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. - ANS
Chemical Reaction


syntehesis, decomposition, combusion, single replacement, double replacement - ANS
Five main types of chemical reactions.


Two elements combine to form a product. - ANS Syntehsis Reaction


The breaking of a compound into component parts. - ANS Decomposition Reaction


The reaction of a compound or element with oxygen. In the combusiton of a hydrocarbon
carbon dioxide and water are produced. - ANS 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. - ANS 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. - ANS 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. - ANS Double Replacement Reaction


The number of protons in a given element. - ANS 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). - ANS Atomic Weight/ Atomic mass number


What group has a +1 charge - ANS IA


What group has a +2 charge - ANS IIA


What group has a +3 charge - ANS IIIA


Density of an object realtive to water - ANS Specific Gravity


Energy of motion - ANS Kinetic Energy


Stored energy - ANS Potential Energy


Form of energy, measured in calories - ANS Heat


The amount of heat necessary to raise the temperature of 1g of water by 1 degree
celsius. - ANS Calorie


Combination of two or more pure substances. - ANS Mixture

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