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HESI - Chemistry Questions and Correct Answers the Latest Update and Recommended Version

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  • Course
  • Hesi A2 Chemistry
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  • Hesi A2 Chemistry

Chemistry is the study of? → Matter and it's properties Three states of matter? → solid, liquid, gas Scientific Notation → Scientific system of writing numbers. A method to write very big or very small number easily Scientific Notation composed of three parts → mathematical sign, t...

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  • October 19, 2024
  • 42
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Hesi A2 Chemistry
  • Hesi A2 Chemistry
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2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!


HESI - Chemistry Questions and Correct
Answers the Latest Update and
Recommended Version
Chemistry is the study of?


→ Matter and it's properties


Three states of matter?

→ solid, liquid, gas


Scientific Notation

→ Scientific system of writing numbers. A method to write very big or very small number
easily


Scientific Notation composed of three parts


→ mathematical sign, the significand, and the exponential


Significand

→ 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

→ is a multiplier of the significand in powers of ten. example -9.0462 x 10^3. the
exponential is 10^3


HESI Hint: Exponent




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,2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

→ 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

→ method to measure weight, length, and volume


Basic measurements for metric system

→ grams, liters, and meters


Basic measure of weight

→ gram


Basic measure of liter


→ volume


Meter

→ Basic measure of distance


In Fahrenheit what is the normal body temperature?

→ 98.6°F


Three most common temperature systems


→ Fahrenheit, Celsius, Kelvin


Fahrenheit




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,2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

→ 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


→ 32° F


In Fahrenheit was is the boiling point of pure water at sea level

→ 212° F


in Fahrenheit what is the freezing point of water or heavy brine at sea level

→ 0° F


Celsius


→ Sometimes called Centigrade used in the rest of the world


In Celsius what is the freezing point of pure water at sea level

→ 0° F


in Celsius what is the boiling point of pure water at sea lever

→ 100° C


in Celsius what is most people body temperature

→ 37° C


what temperature scales are used only in the scientific community

→ Kelvin temperature


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, 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

In Kelvin temperature scale. What is the lowest achievable or absolute (0)

→ (0 K) is -273° C


In Kelvin temp. scale. What is the freezing point of water

→ 273° K


In Kelvin temp. scale. What is the boiling point of water


→ 373° K


In kelvin temp. scale. What is most people body temperature but never used

→ 310° K


Melting ice

→ 21° C and 32° F


normal body temp.

→ 37° C and 98.6° F


boiling water


→ 212° F and 100° C


Atom

→ basic building block for all molecules


Atoms physical structure


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