PreparED Study Materials
Videos
Structural Isomers: C4H10, C5H12, C6H14, C2H5Cl, C2H4Cl2, C2H3Cl3
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the diverse world of structural isomers! Learn how to draw structures for all constitutional isomers with various molecular formulas, including C4H10, C5H12, C6H14, C2H5Cl, C2H4Cl2, and C2H3Cl3.
Mole Count in Elemental Samples (Zn, Ar, Ta, Li)
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
This video outlines the process of calculating the number of moles in various elemental samples. It begins by explaining the relationship between molar mass and atomic weight. Each sample's mass is divided by the respective element's molar mass to find the number of moles. It provides detailed calculations for four elemental samples: zinc (Zn), argon (Ar), tantalum (Ta), and lithium (Li), converting results to scientific notation where necessary. The script demonstrates how to determine the mole
Positron Emission Nuclear Equations: Co-55, Na-22, F-18
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Learn how to write nuclear equations for positron emission with Co-55, Na-22, and F-18. Explore the fascinating world of nuclear reactions.
Molar Mass Calculation: Sr(OH)2 N2O3 NaClO3 Cr2O3 Explained!
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
In this chemistry tutorial learn how to calculate the molar mass of various compounds using atomic masses from the periodic table. Discover the molar mass for compounds such as Strontium Hydroxide Dinitrogen Trioxide Sodium Chlorate and Chromium(III) Oxide. A concise guide to understanding molar masses and their real-world applications.
Determining Oil & Ball Bearing Density: Physics Explained
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover how to determine the density of mineral oil and a metal ball bearing using a graduated cylinder. Learn the method of calculating the mass difference and volume to deduce the density and radius of the ball. Watch a detailed physics experiment explained step by step.
Calculating Formula Masses: From Barium Bromide to Hydrobromic Acid
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Understand the process of calculating formula masses for various compounds. This video breaks down the atomic masses for elements in barium bromide, dinitrogen trioxide, copper(I) sulfate, and hydrobromic acid. Master the method of summing up the masses considering atom count in each formula.














