be able to come back to the skopped part In a reaction vesse

be able to come back to the skopped part. In a reaction vessel, 26.0 g of solid dromium(m) ande, Cr203, was allowed to react with excess carbon tetrachloride in the following reaction Determine the percent yield of the reaction, given that the actual yield of chromium chloride, CrCs, was 40.6 9-(The molar mass of CrZOy 152.00 g/mol and the molar mass ofaas is ise.35 gmol.) Step 1 of 5 Determine the number of moles of Cr203 that react. (Enter an unrounded value. Use at least one more digit than given.) initial mass Cr-03 26.0g molar mass Cr20-152.00 g/mal 152.00 mol Cry0 (There are three significant figures in this problem, but since this is an intermediate step, four significant figures should be given in the answer.) Dotermine the number of significent figures for a calcuation the number of males of a substance Supporting Materials Constants and Factors periodic Table Supplemental Data O Type here to search

Solution

no of moles of Cr2O3 = W/G.M.Wt

                                       = 26g/152g/mole   = 0.17moles

Cr2O3(s) + 3CCl4(l) ----------> 2CrCl3(s) + 3CoCl2(aq)
1 mole of Cr2O3 react with excess CCl4 to gives 2 moles of CrCl3

0.17 moles of Cr2O3 react with excess CCl4 to gives = 2*0.17 = 0.34 moles of CrCl3

mass of CrCl3 = no of moles * gram molar mass

                        = 0.34*158.35   = 53.84g
theoretical yiled of CrCl3 = 53.84g
actual yiled of CrCl3        = 40.6g
percent yield   = actual yiled*100/theoretical yiled
                 = 40.6*100/53.84 = 75.4%