workshop 1 f10 key

# workshop 1 f10 key - One mole of any substance is its...

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Workshop 1 1) From Exam 1, Fall 2007 Sea water contains approximately 0.47moles/liter sodium chloride. How many pounds of sodium chloride are found in a gallon of sea water? (sodium chloride is 58.45g/mol) Useful information: 1 pound = 454g; 1 gallon = 4 quarts; 1 quart = 946 ml. gal lb gal qt qt l g lb mol g l mol 23 . 0 4 946 . 0 454 45 . 58 47 . 0 = × × × × 2) From Exam 1, Fall 2006 How many cubic feet does 100 kg of mercury occupy? Useful info: density of mercury = 13.6 g/cm 3 ; 2.54 cm/inch 3 3 3 3 3 3 3 3 3 3 26 . 0 ) 12 ( 1 ) 45 . 2 ( 1 6 . 13 1 1 1000 100 ft in ft cm in g cm kg g kg = × × × × 3)
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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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