A compound is a substance made up of two or more elements that are chemically bonded together in a fixed ratio. A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.
To balance a chemical equation, you must make sure that the number of atoms of each element is equal on both sides of the equation. This can be done by adjusting the coefficients of the reactants and products.
An exothermic reaction releases heat energy to its surroundings, while an endothermic reaction absorbs heat energy from its surroundings.
To calculate the molar mass of a compound, add the atomic masses of each element present in the compound. This can be found on the periodic table. Make sure to consider the subscripts in the chemical formula.
An acid is a substance that donates hydrogen ions (H+) in a solution, while a base is a substance that accepts hydrogen ions or donates hydroxide ions (OH-) in a solution. Acids have a pH less than 7 and bases have a pH greater than 7.