Moles to Grams, Grams to Moles Conversion Worksheet Key, Exercises of Chemistry

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Name. Date - Per Mole to Grams, Grams to Moles Conversions Worksheet To find moles divide molar mass To find grams multiply molarmass What are the molecular mass of the following compounds? 1) NaOH 29554 ¢ 1400% 4,9) 2) — HaPOs Go 3430.47 4 is Oo) y 410.00 9/41 Mort 48.02 g/ml Hy Cb, 3) H20 Cole t 1649 4) MnoSe7 C4.44)r4 68.402 1$.22 $lad Hg 662.60 Hal Mn Co 5) MeCh 6) . Be AOD AON) g/ae] gel, There are three definitions (equalities) of mole. They are: 1 mole = 6.02 x 10 particles 1 mole = molar mass (could be atomic mass from periodic table or molecular mass) 1 mole = 22.4 L of a gas at STP (You do not need to worry about this yet) (NH4)2504 04.01) rd. ODpa22.094 (6.00 y "3217 g/avl WM,), $0, Each definition can be written as a set of two conversion factors. They are: 1 mole = molar mass(g) can be written as 1 mole OR molar mass (g) molar mass (g) 1 mole 1 mole = 6.02 x 10” particles can be written as 1 mole OR 6.02 x 10? 6.02 x 107 1 mole Solve the following: 1) How many moles are in 15 grams of lithium? (molar mass of lithium is 7 g/mole) 15.00 g § x imole = 2.16 moles lithium OR (15g/7g = 2.16moles) 6.94 grfims 2) How many grams are in 2.4 moles of sulfur? (molar mass of sulfur is 32 g/ mole) 2.40 nrOles x 32.07 grams = 76.97 grams sulfur OR 2.4moles x 32 g= 76.97 g 1 pete 3) How many moles are in 22 grams of argon? 34.45 5 Ar A OSS mel A 4) How many grams are in 88.1 moles of magnesium? GE l0nel Mal] 24.316 My ak > 2141, 75 Ms 5) How many moles are in 2.3 grams of phosphorus? CaP) Plata a 0.07 rol C Unit — 4 Moles and Stoichiometry Page 1 of 2