Molar Mass as a Conversion Factor

Molar Mass as a Conversion Factor - Molar Mass as a...

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Unformatted text preview: Molar Mass as a Conversion Factor Factor • Use molar mass from periodic table • Convert from grams to moles • Convert from moles to grams • Convert from grams to atoms • Convert from atoms to grams Molar Mass Example Molar • A silicon chip used in an integrated silicon circuit of a microcomputer has a mass of 5.68 mg. • How many silicon (Si) atoms are How present in this chip? present Molar Mass Example Molar • A silicon chip used in an integrated silicon circuit of a microcomputer has a mass of 5.68 mg. • Steps to solving: Molar Mass Example Molar • A silicon chip used in an integrated silicon circuit of a microcomputer has a mass of 5.68 mg. • Steps to solving: – Convert mg to g – g to mol – mol to atoms Molar Mass Example Molar • A silicon chip used in an integrated circuit of a silicon microcomputer has a mass of 5.68 mg. • Steps to solving: – Convert mg to g 1 g Si 5.68mg Si = 5.68 x 10-3 g Si 1000 mg Si Molar Mass Example Molar • A silicon chip used in an integrated circuit of silicon a microcomputer has a mass of 5.68 mg. • Steps to solving: – g to mol 1 mol Si 5.68 x 10 g Si = 2.02 x 10-4 mol Si 28.0855 g Si -3 Molar Mass Example Molar • A silicon chip used in an integrated circuit of silicon a microcomputer has a mass of 5.68 mg. • Steps to solving: – mol to atoms 6.022 x 1023 atoms 2.02 x 10-4 mol Si = 1.22 x 1020 atoms 1 mol Si Molar Mass Example #2 Molar • Cobalt (Co) is a metal that is added to Cobalt steel to improve its resistance to corrosion. Calculate both the number of moles in a sample of cobalt containing 5.00 x 1020 atoms and the mass of the 5.00 sample. sample. Molar Mass Example #2 Molar • Calculate both the number of moles in a Calculate sample of cobalt containing 5.00 x 1020 sample atoms and the mass of the sample. atoms • Steps to solving: Molar Mass Example #2 Molar • Calculate both the number of moles in a Calculate sample of cobalt containing 5.00 x 1020 sample atoms and the mass of the sample. atoms • Steps to solving: – Convert atoms to mol Molar Mass Example #2 Molar • Calculate both the number of moles in a Calculate sample of cobalt containing 5.00 x 1020 sample atoms and the mass of the sample. atoms • Steps to solving: – Convert atoms to mol – mol to g Molar Mass Example #2 Molar • Calculate both the number of moles in a sample Calculate of cobalt containing 5.00 x 1020 atoms and the of mass of the sample. mass • Steps to solving: – Convert atoms to mol 5.00 x 10 20 1 mol Co atoms Co = 8.30 x 10-4 mol Co 23 6.022 x 10 atoms Co Molar Mass Example #2 Molar • Calculate both the number of moles in a sample Calculate of cobalt containing 5.00 x 1020 atoms and the of mass of the sample. mass • Steps to solving: – mol to g 58.9332 g Co 8.30 x 10 mol Co = 4.89 x 10-2 g Co 1 mol Co -4 Self Learning Self • Click here to view a video on molar mass Click here and using molar mass for conversions and • Click here for a practice quiz Click here ...
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