Question

QUESTION 26 What volume of scandium, in milliliters, will have a mass of 31.2 grams? The density of Scandium is 2.985 g/mL Report your answer in milliliters to three significant figures and do not include units. RE QUESTION 27 How many molecules of CH4 are in 39.2 grams of CH4? Report your number of molecules to two significant figures and do not include units NO QUESTION 28 6 + + Determine the theoretical yield of Fe2O3, in grams, if 20.4 grams of FeS and 15.0 grams of O2 are reacted. Fes 02 Fe2O3 SO2 Molar mass (g/mol). 87.90 32.00 159.7 64.06 Input the theoretical yield of Fe2O3 in grams.record your answer to three significant figures and do not show units dh Click Save and Submit to send mit Chin Small

Answer 1

26 of Sc= 2.985 2.985 g/m2 mass of Sc = 31.2 density of Sca mass volume volume 31-2 ml 2.985 10.4 21 log of Chu 6,022810² molecules 39-2g Chley = 6.022x10²3 +39.2 श 16 23 14 x 10 1 28 safego +450 mass (g) 4 FeS +702 20.4 15.0 32.00 159.7 64.06 Molar mass 87.90 moles 0.23 0.46 limiting Reagent = fes 4x87.90g of fe S = 2X159.7 g of Feroz 20.49 of fe S - 2X159.7 x 20.4 g feo 4887.90 - / 18.5 CSScanned with CamScanner