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HESI A2 Chemistry 2024 Exam Questions and Answers( A+ GRADED 100% VERIFIED).
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HESI A2 Chemistry 2024 Exam Questions and Answers( A+ GRADED 100% VERIFIED).
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Hesi A2 Chemistry 2024Different types of bonds - ANS covalent, ionic, hydrogen
Covalent bond - ANS A chemical bond that involves sharing a pair of electrons between atoms
in a molecule
Ionic bond - ANS Formed when one or more electrons are transferred from one atom to
another
Hydrogen bond - ANS A type of weak chemical bond formed when the slightly positive
hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative
atom of a polar covalent bond in another molecule.
Polar covalent - ANS a type of bond that forms when electrons are not shared equally
Nonpolar covalent - ANS equal sharing of electrons
Properties of water - ANS high polarity->hydrogen bonding-> cohesiveness-> adhesiveness
->high specific heat->high latent heat and High heat of vaporization
Acids - ANS compounds that form hydrogen ions when dissolved in water
Bases - ANS Compounds that reduce the concentration of hydrogen ions in a solution.
Calculating molarity - ANS moles of solute/liters of solution
Calculating density - ANS Density = mass/volume
Types of reactions - ANS synthesis, decomposition, single replacement, double replacement,
combustion
Synthesis - ANS combining parts into a whole
Decomposition - ANS A chemical reaction that breaks down compounds into simpler products.
(AB->A+B)
Single replacement - ANS one element replaces another element in a compound
A + BC --> B + AC
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