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HESI Chemistry Study Guide | Key Concepts & Conversions

Course
Clinical Chemistry

Subject
Chemistry

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Study Guide

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4

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ATIPROS

HESI Chemistry
Although chemistry might not seem directly relevant to nursing, its significance is greater than you may realize. Nurses need to grasp the medications they administer, conversion factors, and the underlying mechanisms of these drugs. If you aim to advance into more specialized areas, a basic knowledge of chemistry is essential, along with possibly an understanding of organic or physical chemistry. A strong grasp of chemistry is crucial for comprehending how different medications interact, which has a direct impact on patient care.
Here are some fundamental chemistry concepts you should be familiar with to excel in the Chemistry section of the HESI exam:
Units of Measurement
Metric
Volumes are typically measured in milliliters (ml) or cubic centimeters (cm³).
1 ml = 0.001 L
1 Liter = 1 cm³
e.g. 5 L = 5000 ml = 5000 cm³
Masses are generally recorded in grams (g) or kilograms (kg), noting that 1 kg = 1000 g. The volume of 1 kg of water is approximately 1 L, so the volume of 1 g of water is roughly 1 L / 1000 = 1 ml or 1 cm³.
Lengths are usually measured in meters (m), centimeters (cm), or millimeters (mm).
Imperial
Although imperial units are less frequently used today, you may still need to convert from imperial to metric. The imperial units of volume include pints and gallons, while lengths can be expressed in inches, feet, yards, or miles, and masses can be given in ounces, pounds, or stones.
1 gallon = 4.5 liters
1 liter = 1.75 pints
1 inch = 2.54 cm
1 foot = 30.5 cm
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  • Uploaded on: 1 year ago
  • Pages: 4
  • Type: Study Guide
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