3 Ways To Calculate Mass Percent Wikihow Calculate the mass percent. now that the equation is filled in, simply solve to calculate the mass percent. divide the mass of the element by the total mass of the compound and multiply by 100. this will give you the mass percent of the element. example 1: mass percent = (2.01588 18.01528) x 100 = 0.11189 x 100 = 11.18%. 1. list the elements in the compound. for example, say you need to calculate the mass percent of citric acid, c6h8o7, as shown in the picture. the elements of this compound are carbon (c), hydrogen (h), and oxygen (o). 2. write down the atomic mass of each individual element.
How To Calculate Mass Percent 13 Steps With Pictures Wikihow Multiply the atomic mass of each isotope by its proportion in the sample. multiply the atomic mass of each isotope by its percent abundance (written as a decimal). to convert a percentage to a decimal, simply divide it by 100. the converted percentages should always add up to 1. For glucose, c 6 h 12 o 6, the molar mass of each element is: carbon, 12.0107 x 6 = 72.0642 g mol; hydrogen, 1.007 x 12 = 12.084 g mol; and oxygen, 15.9994 x 6 = 95.9964 g mol. 4. add the molar masses of each element in the compound. this determines the molar mass for the entire compound. take the products you obtained in the previous step and. For example, 67% becomes 0.67; 125% becomes 1.25; 108% becomes 1.08, etc. divide the percentage by 100, and drop the percent mark. this expresses the percentage as a decimal. 6. multiply this decimal with your original amount. if, for example, we're working on the problem "a $25 pair of jeans is on sale at 60% off. Take your height in inches and square it. if you are 70 inches (177.8 cm) tall, take 70 x 70. take your weight divided by that number. if you are 150 pounds, that's 150 4900. that's .0306. then, take that number and times it by 703. there's your bmi. for this instance, that's 21.6. for metric measurements:.
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