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Kitendawili mwanangu ananidai kila siku? En que provincia vive khea? Fe(NH4)2(SO4)2 + NI net ionic equation? 4Cr + 3O2 -> 2Cr2O3 How Many Moles of chromium are needed to react with 45.6 g of oxygen? My answer was 1.9molCr but Idk if its right? Assume a normal distribution for N = 300. How many cases would one expect to find between +1 and -1 standard deviations around the mean?