Question

Step No. 1. Identity Number of the Unknown 3. Mass of test tube and total unknown 83.138 5. Mass of test tube and about half unknown g 1-978 7. Mass of test tube (empty) laeall # 2 #1 Mass of filter paper 12. Mass of filter paper and Cu Mass-of filter paper and-Cu 18. 20a. g Calculate Beaker #2 Beaker #1 Lఏ 1 Mass of Unknown sample 21 20b. Mass of recovered copper 22. e by mass copper (show calculations) 100 23a. Formula weight of Unknown Cu compound amu amu (Show calculations) 23b. Average value of formula weight amu Calculations: e וית lod.33 by mass copper xlo0% Formula Weight of Unknown Cu Compound 1 Cn 0-916-0.012ee 0.7483 6355 a OO२ 100

is this right?

Answer 1

Mad Calulation's :- Massg unknown sample a mass of test tube and we known - massay 2). cupty test the - 03.178-81.978 = 1.2 g marg recovered wopper = maro filter paper-mass of filtapaper tu -1.912-1164 = 0.748g zob. mabo % by mass of copper a mass of copper X100 0.748 x100 Total mab ): 2 = 62.33% For formula mars.cu Let us assure there formula of compound a Cu A How presence of Cu in it = 62.33% and molar mang cu = 63.559 so for motor at formule mass of compound 63.55 g is 62.33% of Total mass then total walls I 63.53X100 62.33 2 lolias gan 7 102gn n So formula massa 102 gesamel.