CHEM 140: College Chemistry I

Explore the fascinating world of chemistry as we calculate the mass of a sugar crystal with 1.8 x 10¹? molecules of sucrose. Using the concept of a mole and Avogadro's number, discover how to convert molecular numbers to milligrams. Grasp foundational principles in a clear, engaging format.

Learn a practical application of chemistry and mathematics in your daily life. Whether you're a tea or coffee enthusiast, this video offers valuable insights into scale removal and maintaining your kitchen appliances.

Learn how to calculate the molarity of different solutions containing methanol, calcium chloride, and naphthalene. Essential for chemistry enthusiasts.

Discover the process of determining the final temperature of an iron nail after heat absorption. Using the specific heat capacity of iron and the heat transfer formula, we calculate the temperature increase and reveal the nail's new thermal state. This tutorial offers a clear understanding of how materials respond to heat.

Unpack the difference between quantitative and non-quantitative observations. Examples include a person's weight on the Moon and the depth a hand pump can reach. Learn why precise measurements are crucial in scientific studies.

Dive into the accuracy of four chemical reactions involving compounds like Barium Nitrate and Lithium Chloride. Discover which reactions yield precipitates which are correct and which need correction. A comprehensive review from Barium Sulfate formation to Lead Chloride precipitation