Pyrite Fines containing 85% FeS2, and 15% gangue are charged to a burner. An analysis of the cinder shows 11.11% FeS2, 66.63 % Fe203, 2.67 % SO3 and 19.6% gangue. Air is supplied 17.33% in excess...

Please answer only #'s 4,5, and 6. Thank you!

Extracted text: Pyrite Fines containing 85% FeS2, and 15% gangue are charged to a burner. An analysis of the cinder shows 11.11% FeS2, 66.63 % Fe203, 2.67 % SO3 and 19.6% gangue. Air is supplied 17.33% in excess (FeS2 to SO3) at 250C, 740 mm Hg and 80% RH. If 8% of the SO3 formed is absorbed in the cinder, Answer the following questions: 1. How many moles of nitrogen is supplied? a.1.948 b. 2.656 c. 11.723 d. 3.1163 2. How many % excess oxygen (FeS2 to SO3) is supplied? a. 46.78% b. 59.97% c. 62.46% d. 56.38% 3. What % FeS2 from the Feed is lost in the cinder? a.10.00% b. 8.00% c. 12.00% d. none of the three 4. How many moles of SO3 are produced? а. 0.48 b. 0.37 c. 0.52 d. 1.2 5. How many moles are there of the free oxygen in the burner gas? b. 0.59 C. 1.204 d. cannot be computed а.3.11 6. How many moles of SO2 are there in theburner gas? a.0.784 b. 0.955 С. О.831 d. 0.855