## How To Find The Amount of Excess Reactant

When two substances are reacted in a nonstoichiometric ratio, one of the 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

## How To Convert Grams To Number of Atoms

In the previous two posts, we discussed converting grams to moles and grams to molecules. For the moles, here is what we do: first look up the molar mass in the periodic table, set up the correct conversion factor, and … Read more

## Grams to Molecules and Molecules to Mass

In the previous post, we discussed converting grams to moles. Remember, the first thing was to look up the molar mass in the periodic table, set up the correct conversion factor, and finally do the multiplication. Here is a short … Read more

## How To Convert Grams To Moles

To convert the grams to moles, we need to know the molar mass of the substance. Remember, molar mass (M) is the mass of one mole of atoms/molecules/ions expressed in g/mol. To calculate it we are always going to need a … Read more

## How To Calculate The Molar Mass

The mass of one mole of atoms/molecules/ions is called its molar mass (M) expressed in g/mol. To calculate the molar mass of an atom or a molecule, we are always going to need a periodic table. So, how do we … Read more

## Mass, Moles, and Number of Particles Practice

In this set of practice problems, we will work on molar calculations such as converting between Mass, Moles, and Number of Ions and Atoms. For all the problems, calculating the molar mass is not shown as it should be a … Read more

## Limiting Reactant Practice Problems

This is a set of practice problems to help master the concept of limiting reactant which is critical in calculating the amount of product that can be obtained in a chemical reaction. Remember, if the reactants are not in stoichiometric … Read more

## Stoichiometry of Chemical Reactions

In a chemical reaction, stoichiometry shows the mole-ratio of the reactants and products based on the coefficients which are written before them. It allows calculating the amount of any component of a chemical reaction if one of them is given … Read more

## Stoichiometry Practice Problems

This is a comprehensive, end-of-chapter set of practice problems on stoichiometry that covers balancing chemical equations, mole-ratio calculations, limiting reactants, and percent yield concepts.  The links to the corresponding topics are given below. The Mole and Molar Mass Molar Calculations … Read more

## Reaction/Percent Yield

In the previous post, we talked about the limiting reactant and its importance in determining how much product can be produced in a chemical reaction. The amount of product(s) we calculate based on the limiting reactant is called the theoretical … Read more

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