HESI – Chemistry GUIDE ACTUAL EXAM NEWEST VERSION
2024-2025 EXPECTED QUESTION AND CORRECT ANSWER
FROM VERIFIED SOURCES RATED A GRADE.
Chemistry is the study of? ✔✔CORRECT ANSWER✔✔Matter and it's
properties
Three states of matter? ✔✔CORRECT ANSWER✔✔solid, liquid, gas
Scientific Notation ✔✔CORRECT ANSWER✔✔Scientific system of writing
numbers. A method to write very big or very small number easily
Scientific Notation composed of three parts ✔✔CORRECT
ANSWER✔✔mathematical sign, the significand, and the exponential
Significand ✔✔CORRECT ANSWER✔✔base value of the number or the value
of the number when all the values of ten are removed. example -9.0462 x
10^3. the significand is -9.0462
Exponential ✔✔CORRECT ANSWER✔✔is a multiplier of the significand in
powers of ten. example -9.0462 x 10^3. the exponential is 10^3
,HESI Hint: Exponent ✔✔CORRECT ANSWER✔✔some calculators or other
devices may write the exponent as an "e" or "E" as in 3.2 e5 or 3.2E5 instead
of 3.2 x 105, which is called E notation
Metric System ✔✔CORRECT ANSWER✔✔method to measure weight, length,
and volume
Basic measurements for metric system ✔✔CORRECT ANSWER✔✔grams,
liters, and meters
Basic measure of weight ✔✔CORRECT ANSWER✔✔gram
Basic measure of liter ✔✔CORRECT ANSWER✔✔volume
Meter ✔✔CORRECT ANSWER✔✔Basic measure of distance
In Fahrenheit what is the normal body temperature? ✔✔CORRECT
ANSWER✔✔98.6°F
Three most common temperature systems ✔✔CORRECT
ANSWER✔✔Fahrenheit, Celsius, Kelvin
Fahrenheit ✔✔CORRECT ANSWER✔✔Used in the United States and its
territories such as Belize, and Jamaica
,in Fahrenheit what is the freezing point of pure water at sea level
✔✔CORRECT ANSWER✔✔32° F
In Fahrenheit was is the boiling point of pure water at sea level ✔✔CORRECT
ANSWER✔✔212° F
in Fahrenheit what is the freezing point of water or heavy brine at sea level
✔✔CORRECT ANSWER✔✔0° F
Celsius ✔✔CORRECT ANSWER✔✔Sometimes called Centigrade used in the
rest of the world
In Celsius what is the freezing point of pure water at sea level ✔✔CORRECT
ANSWER✔✔0° F
in Celsius what is the boiling point of pure water at sea lever ✔✔CORRECT
ANSWER✔✔100° C
in Celsius what is most people body temperature ✔✔CORRECT
ANSWER✔✔37° C
what temperature scales are used only in the scientific community
✔✔CORRECT ANSWER✔✔Kelvin temperature
, In Kelvin temperature scale. What is the lowest achievable or absolute (0)
✔✔CORRECT ANSWER✔✔(0 K) is -273° C
In Kelvin temp. scale. What is the freezing point of water ✔✔CORRECT
ANSWER✔✔273° K
In Kelvin temp. scale. What is the boiling point of water ✔✔CORRECT
ANSWER✔✔373° K
In kelvin temp. scale. What is most people body temperature but never used
✔✔CORRECT ANSWER✔✔310° K
Melting ice ✔✔CORRECT ANSWER✔✔21° C and 32° F
normal body temp. ✔✔CORRECT ANSWER✔✔37° C and 98.6° F
boiling water ✔✔CORRECT ANSWER✔✔212° F and 100° C
Atom ✔✔CORRECT ANSWER✔✔basic building block for all molecules
Atoms physical structure ✔✔CORRECT ANSWER✔✔nucleus and orbits called
electron clouds
Nucleus ✔✔CORRECT ANSWER✔✔found at the center of the atom
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