Stoichiometry is a quantitatve process given an initial mass or volume of reactant or product the molar relationships between reactants and products in a chemical reaction are used to calculate a specific mass or volume of another reactant or product. Here m represents the mass of an object or material v represents the volume and the curly p which is the greek letter rho represents the density there are also many formulas for volume . In chemistry stoichiometry is often the most challenging thing this video shows you a new way to solve mass volume problems. Mass to volume and volume to mass problems chemical reactions frequently involve both solid substances whose mass can be measured as well as gases for which measuring the volume is more appropriate stoichiometry problems of this type are called either mass volume or volume mass problems. To determine the density you need the volume and the mass since you know the mass 40 g but the volume is not given to find the volume use the formula for the volume of a box volume length x width x height the volume of the cube is 2cm x 2cm x 2cm 8cm 3 the density then is the mass divided by the volume
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