Molar Mass Conversions 1 mol of Fe atoms is 55.85 g/mol How many grams in 2.00 mol Fe? or 3.00 mol Fe? or 0.0587 mol Fe?

Use molar mass to convert between mass and moles. (get MM from the PT) Type 3 mol grams 2.50 mol x 16.00 g = ______ g 1 mol Type 4 grams mol 24.02 g x 1 mol = _____ mol 12.01 g

What is the mass of 9.45 mol Al2O3 ? Type 3 mol grams Aluminum satellite dishes resist corrosion because the Al reacts with O2 to form a coating of aluminum oxide (Al2O3). What is the mass of 9.45 mol Al2O3 ? 9.45 mol x 101.96 ______g = 1 mol 964 g Al2O3 2 (26.98) + 3 (16.00) = 101.96 g/mol

Find the mass, in grams, of 0.0452 mol C20H42 (wax). Type 3 mol grams Find the mass, in grams, of 0.0452 mol C20H42 (wax). 0.0452 mol x 282.62 ______g = 1 mol 12.8 g C20H42 20 (12.01) + 42 (1.01) = 282.62 g/mol

Type 4 grams mol Fe2O3 159.70 g/mol When iron is exposed to air, it corrodes to form red-brown rust which is iron(III) oxide (Fe2O3). How many moles are in 92.2 g of Fe2O3 ? 92.2 g x ______= 159.70 g 1 mol 0.577 mol Rust weakens an iron chain. Fe2O3 2 (55.85) + 3 (16.00) = 159.70 g/mol

N2O Find the number of moles in 258 g dinitrogen monoxide. Type 4 grams mol Find the number of moles in 258 g dinitrogen monoxide. N2O 258 g x ______= 44.02 g 1 mol 5.86 mol N2O 2 (14.01) + 1 (16.00) = 44.02 g/mol

1. Where do you look to get the molar mass of an element? Quick Quiz! 1. Where do you look to get the molar mass of an element? Avogadro’s number the periodic table your neighbor’s paper your face

Quick Quiz. 2. Calculate the mass in grams of a sample containing 1.85 mol of water. 1.11 x 1024 g 33.3 g 18.02 g 8460 g MM = 18.02 g/mol

Quick Quiz. 3. Calculate the number of moles in a spoonful of table salt (NaCl) having a mass of 3.50 g. 208 mol 2.58  103 mol 0.0599 mol 17.0 mol MM = 58.44 g/mol