Calculations Involving Chemical Formulae When we do not know the mass of the compound, but have the chemical formula we can still find the percentage composition. Use the following steps to calculate percentage composition: 1. To do this we need to first calculate the molar mass of the entire compound 2. Secondly, we need to compare the individual molar mass of each element in the compound to the molar mass of the entire compound. 3. IMPORTANT: If you have many atoms of one element type in the compound you must multiply the molar mass of that element by the number of atoms of that element present in the compound 4. Finally, divide the molar mass of the element by the molar mass of the compound and multiply by 100% % composition - Inumber of atoms.of "y" in compound) x (molar mass of "Y from PT) x 100% of element "y molar mass of whole compound Example 3 Calculate the percentage composition of Na,CO,

Calculations Involving Chemical Formulae When we do not know the mass of the compound, but have the chemical formula we can still find the percentage composition. Use the following steps to calculate percentage composition: 1. To do this we need to first calculate the molar mass of the entire compound 2. Secondly, we need to compare the individual molar mass of each element in the compound to the molar mass of the entire compound. 3. IMPORTANT: If you have many atoms of one element type in the compound you must multiply the molar mass of that element by the number of atoms of that element present in the compound 4. Finally, divide the molar mass of the element by the molar mass of the compound and multiply by 100% % composition - Inumber of atoms.of "y" in compound) x (molar mass of "Y from PT) x 100% of element "y molar mass of whole compound Example 3 Calculate the percentage composition of Na,CO,

Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter7: Chemical Formula Relationships

Section: Chapter Questions

Problem 75E: CoaSbOcXH2O is the general formula of a certain hydrate. When 43.0g of the compound is heated to...

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