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.
This worked example problem shows you how to convert moles to grams. Problem. Determine the mass in grams of 3.60 mol of H 2 SO 4. Solution. First, look up the atomic masses for hydrogen, sulfur, and oxygen from the Periodic Table. The atomic mass is 1.008 for H; 32.06 for S; 16.00 for O. The formula mass of H 2 SO 4 is: 2(1.008) + 32.06 + 4(16.00) = 98.08. Thus, one mole of H 2 SO 4 weights 98.08 grams. This relation provides a conversion factor to go from grams to moles. Using the factor 98.08 g / 1 mol: grams H 2 SO 4 = 3.60 mol x 98.08 g / 1 mol = 353 g H 2 SO 4.