HESI A2 CHEMISTRY EXAMINATION TEST
2026 COMPREHENSIVE QUESTIONS AND
SOLUTIONS WITH EXPLANATION
CERTIFICATION EVALUATION GRADED A+
⩥ MASS. Answer: quantity of matter an object has
⩥ When atoms from TWO elements COMBINE, the result is
_________.. Answer: Molecule of Compound
⩥ Boyle's Law. Answer: For a given MASS and constant
TEMPERATURE, an INVERSE relationship exist between the
VOLUME and pressure of GAS
⩥ Charles' Law. Answer:
⩥ Ideal Gas Law. Answer:
⩥ Stefan-Boltzmann Law. Answer:
⩥ pH of a solution containing many Hydroxide ions (OH-) and a few
hydrogen ions (H+)?. Answer: 9
,⩥ SUBLIMATION. Answer: CHANGING FROM SOLID TO GAS
⩥ Lb-> Kg. Answer: 1 lb = 0.453592 kg
⩥ NOT Radioactive. Answer: -Noble gases, relatively nonreactive
-They have a complete valence shell making them the least reactive
⩥ Moles. Answer: -SI unit used to measure the number of representative
particles in a substance
-6.02 x 10²³
-Molarity=moles of solute/liter of solution
-Ex. How many moles of salt are contained in 200 mL of a 0.60 M NaCl
solution?
-Answer: 0.200 L × (0.60 moles NaCl / 1.00 L solution) = 0.12 moles
NaCl.
⩥ Vaporization. Answer: Liquid or Solid to gas phase
⩥ Evaporation. Answer: Liquid to gas state below the temperature at
which it boils
⩥ Condensation. Answer: Deposition of a liquid or solid from its vapor
, ⩥ Unaffected by Cellular Differentiation. Answer: DNA
⩥ Range of Blood pH. Answer: 7.35-7.45
⩥ When an ELECTRON moves from a LOWER to HIGHER ENERGY
level, the electron. Answer: ABSORBS a quantum of energy
⩥ What is scientific notation. Answer: an easier way to write very large
and very small numbers
⩥ Give numerical, abbreviations, and exponentials, meaning of tera.
Answer: ,T-,10 to the 12th power -1 trillion times
⩥ Give numerical meaning of giga abbreviations, and exponentials.
Answer: 1 billion times, G-, 10 to the 9th power
⩥ Give numerical meaning of mega abbreviations, and exponentials.
Answer: 1 million times, M-, 10 to the 6th power,
⩥ Give numerical meaning of kilo abbreviations, and exponentials.
Answer: 1 thousand times, k-, 10 to the 3rd power,
2026 COMPREHENSIVE QUESTIONS AND
SOLUTIONS WITH EXPLANATION
CERTIFICATION EVALUATION GRADED A+
⩥ MASS. Answer: quantity of matter an object has
⩥ When atoms from TWO elements COMBINE, the result is
_________.. Answer: Molecule of Compound
⩥ Boyle's Law. Answer: For a given MASS and constant
TEMPERATURE, an INVERSE relationship exist between the
VOLUME and pressure of GAS
⩥ Charles' Law. Answer:
⩥ Ideal Gas Law. Answer:
⩥ Stefan-Boltzmann Law. Answer:
⩥ pH of a solution containing many Hydroxide ions (OH-) and a few
hydrogen ions (H+)?. Answer: 9
,⩥ SUBLIMATION. Answer: CHANGING FROM SOLID TO GAS
⩥ Lb-> Kg. Answer: 1 lb = 0.453592 kg
⩥ NOT Radioactive. Answer: -Noble gases, relatively nonreactive
-They have a complete valence shell making them the least reactive
⩥ Moles. Answer: -SI unit used to measure the number of representative
particles in a substance
-6.02 x 10²³
-Molarity=moles of solute/liter of solution
-Ex. How many moles of salt are contained in 200 mL of a 0.60 M NaCl
solution?
-Answer: 0.200 L × (0.60 moles NaCl / 1.00 L solution) = 0.12 moles
NaCl.
⩥ Vaporization. Answer: Liquid or Solid to gas phase
⩥ Evaporation. Answer: Liquid to gas state below the temperature at
which it boils
⩥ Condensation. Answer: Deposition of a liquid or solid from its vapor
, ⩥ Unaffected by Cellular Differentiation. Answer: DNA
⩥ Range of Blood pH. Answer: 7.35-7.45
⩥ When an ELECTRON moves from a LOWER to HIGHER ENERGY
level, the electron. Answer: ABSORBS a quantum of energy
⩥ What is scientific notation. Answer: an easier way to write very large
and very small numbers
⩥ Give numerical, abbreviations, and exponentials, meaning of tera.
Answer: ,T-,10 to the 12th power -1 trillion times
⩥ Give numerical meaning of giga abbreviations, and exponentials.
Answer: 1 billion times, G-, 10 to the 9th power
⩥ Give numerical meaning of mega abbreviations, and exponentials.
Answer: 1 million times, M-, 10 to the 6th power,
⩥ Give numerical meaning of kilo abbreviations, and exponentials.
Answer: 1 thousand times, k-, 10 to the 3rd power,
