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.
Solution: : Finding the empirical and molecular formula is basically the reverse process used to calculate mass percent. Step 1: Find the number of moles of each element in a sample of the molecule. Our molecule contains 40.00% carbon, 6.72% hydrogen and 53.28% oxygen.This means a 100 gram sample contains:inding the empirical and molecular formula is basically the reverse process used to calculate mass percent. Step 1: Find the number of moles of each element in a sample of the molecule. Our molecule contains 40.00% carbon, 6.72% hydrogen and 53.28% oxygen. This means a 100 gram sample contains: