Chemistry
Honors Chemistry PS.19Name: ________________________________________ Date: ______________ Mods: __________Unit 7: Formula Weight & Percent CompositionDirections: Determine either the name or formula for the following compounds and then determine the formula weight of each:N2O5 Name: ________________________________________FW:Ca(C2H3O2)2Name: ________________________________________FW:(NH4)3PO3Name: ________________________________________FW:sodium nitriteFormula: ______________________________________FW:copper (II) thiocyanateFormula: ______________________________________FW:disilicon hexabromideFormula: ______________________________________FW:Percentage Composition PracticeDirections: Give the % composition of all elements in the following compounds. Show all work!_________________________________________________________________________________7)ammonium sulfite% N __________________% H __________________% S __________________% O ___________________________________________________________________________________________________8)aluminum acetate% Al __________________% C __________________% H __________________% O ___________________________________________________________________________________________________9)barium permanganate% Ba _________________ % Mn _________________% O ___________________________________________________________________________________________________10)vanadium (V) thiosulfate% V __________________% S __________________% O ___________________________________________________________________________________________________11)oxalic acid% C __________________% H __________________% O ____________________________________________________________________________________________________________________________________________________________________________________12)How much iron can be recovered from 25 grams of iron (III) oxide?_________________________________________________________________________________13)Given 318 grams of silver sulfide, how many grams of silver could be produced?_________________________________________________________________________________14)How many grams of sulfur are in 7.3 grams of tetrasulfur pentafluoride?_________________________________________________________________________________ ................
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