In these practice problems, we will go over examples of determining the wavelength, frequency, and energy of light, calculating the number of photons in a laser pulse based on the energy, understanding the correlation between the energy and wavelength and … Read more
In a displacement reaction, an ion (or atom) in a compound is replaced by an ion (or atom) of another element. We can use this general scheme for a visual representation of displacement reactions: There are a few … Read more
When two substances are reacted in a nonstoichiometric ratio, one of them is going to be the limiting reactant (LR), and the other is the excess reactant. The limiting reactant is the one that runs out first, and therefore, defines … Read more
Although there are some common patterns to determine the product(s) of a reaction, the exact outcome depends on the type of the reaction. So, let’s discuss the process for the main types of reactions that you are going to see … Read more
Matter exists in three main physical states: solid, liquid, and gas. Now, first in simple words: what is a solid, liquid, and a gas. On a visual level, we can identify them based on their shape and how they occupy … Read more
Let’s explain what mixture is in simple words without going into formal language. A mixture is something that is made by mixing two or more different things. Mixtures are everywhere we look. For example, you are sitting on the beach … Read more
Let’s explain what mixture is in simple words without going into formal language. A mixture is something that is made by mixing two or more different things. Mixtures are everywhere we look. For example, you are sitting on the beach … Read more
In the previous two posts, we discussed the meaning of significant figures, counting them in a number, and the rules of using them in addition, subtraction, multiplication, and division. These are the main ideas you need to remember when working … Read more
In the previous post, we talked about significant figures, the ways of counting them, and their importance in the certainty of measurements. Significant figures of a measured number also dictate the certainty of the answer obtained by mathematical operations such … Read more
