Unformatted text preview: One mole of any substance is its molecular or atomic weight in grams. One mole of a substance contains 6.02x10 23 molecules or atoms. a. Using the periodic table, find how many grams are there in one mole of helium (He). b. How many grams are in 0.27 moles of helium? c. How many atoms are in 0.27 moles of helium? a. 1 mole of He weighs 4.0g b. 4.0g/mol x 0.27 moles = 1.08 ~ 1.1 g c. 0.27 moles x 6.02x10 23 atoms/mole = 1.6x10 23 atoms...
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This note was uploaded on 02/04/2011 for the course CHEM 102 taught by Professor Peterpastos during the Fall '08 term at CUNY Hunter.
- Fall '08