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 mass of an element is equal to the number of moles of that element. For example, hydrogen has a mass of one gram, which is equal to one mole of hydrogen, while, oxygen has a mass of sixteen grams, which is equal to one mole of oxygen. This is then used to determine the chemical formula of a substance. First, determine the masses of the atoms of the elements in the substance, and then convert it to moles. The ratio of the moles of each atom in the substance is the mole ratio, which is then used to determine the chemical formula.