The catch is that the audio CD is uncompressed. While you might have been able to put seven or eight hours of MP3s onto a single data CD before, youâre out of luck with an audio CD. These contain only about 70 minutes or so. It may take several audio CDs to hold what you might currently have on a single data CD.
Example 1: mass percent = (mass of chemical/total mass of compound) x 100 = (5 g/105 g) x 100. Example 2: We want to rearrange the mass percent equation to solve for the unknown mass of the chemical: mass of the chemical = (mass percent*total mass of the compound)/100 = (15*175)/100. 5. Calculate the mass percent.
The formula weight of a substance (element or compound) is the sum of the atomic weights of all the atoms in the. chemical formula of the substance. A molecular weight of a substance is the sum of all the atomic weights of all. the atoms in a molecule of a molecular substance. The terms formula weight and molecular weight are often used. interchangeably, but formula weight includes simple or empirical formulas of compounds, as well as, molecular. formulas. To calculate the formula weight or molecular weight of a compound, set up a table: 1. List the elements in the compound.