Tollowing eaction: GeH4 + 3 GeF4 ----> 4 GeF3H If the percent yield of this reaction is 92.6%, how many moles of GeF4 are needed to produce 8.00 mole of GEF3H? Select one: a. 5.56 b. 3.24 c. 6.00 d. 2.78 e. 2.16

Homework Problems 4.1 Calculate the number of moles in a 5.00-g sample of each of the following: a. Caffeine (C8H10N402) b. Aspirin (C9H8O4) c. PenicillinV (C16H18N2O5S) 4.2 Balance the following equations: a. Cl₂O7 + H₂O ->>> HC104 b. Fe2(CO3)3 Fe2O3 + CO₂ c. H3PO4 + Mn(OH)2 - Mn3(PO4)2+ H₂O d. P₂H4 → PH3 + P4 e. SO₂Cl2 + HI→ H₂S + H₂O + HC1 + 1₂ 4.3 Write the formula equation, total ionic and net ionic equations for each of the following: a. The reaction of Pb(NO3)2 and LiCl. b. The reaction of ZnSO4 and KOH. 4.4 In the following redox reactions, identify what is oxidized and what is reduced: a. Zn(s) + 2Ag (aq) → Zn²+(aq) + 2Ag(s) - b. Sn²+ (aq) + 2Ce+(aq) c. 2Au(s) + 6H*(aq) d. 4Co(s) + 302(g) e. 2CO(g) + O2(g) → → Sn(aq) + 2Ce³+ (aq) 3+ 2Au³+ (aq) + 3H₂(g) 2C0203(s) 2CO2(g) 4-24

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2 C2H4  +  6 O2  -->  4 CO2  + 4 H2O From the above reaction, how many moles of O2 are required for the complete combustion of 44.88 g of C2H4? a. 1.3 ×102  mol b. 3.00 mol c. 4.8 mol d. 11.25 mol

& Esc 76°F Rain 1 7 Calculate the percent yield when: Theoretical yield = 4.5 g; Actual yield = 3.78 g O O O O F2 120% 2 0.12% 8.4% 84% # 3 $ 4 F5 D E % 5 T Search F7 6 F8 & 7 COCO F9 8 F10 P

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All changes saved 4. The combustion of glucose is represented by the following balanced equation: C6 H12O6+6 O26 H20 -- 6 CO2. Which reactant is the limiting reagent if there is 1 gram of both C6H1206 and O2? O a CO2 O b. 02 Oc CH2O6 Od. H,0 PREVIOUS 4 of 5 NEXT 24 & 6 7 8 e t. k C b S'

04 Fill in the Blank Drag and Drop Use the reaction below to determine the mass of oxygen needed to completely react 450.4 grams of butane (C4H10). 2 CH10 13 O2 -----> 8 CO2 10 H20 Molar mass of butane = 1 mole Molar mass of oxygen = 16.00 6. mole 450.4 g of butane = 1 i moles Moles of oxygen needed = 1 i moles Mass of oxygen needed = 1 i grams : 7.747 :: 50.36 :: 1611 : 450.4 : 58.14 : 1522 :32.00 : 42

In the Reaction, 2CO(g)+)2(g)-> 2 CO2(g)   a. How many moles of carbon monoxide react with 3.0 moles of O2? b. How many moles of carbon dioxide are produced from 3.0 moles of O2?

Consider the reaction of zinc metal with hydrochloric acid: Zn + 2 HCI - ZnCl, + H, Calculate the moles of HCl needed to react completely with 8.25 moles of zinc. O a 16.5 moles of HCI More information is needed. 4.13 moles of HCI O d 8.25 moles of HCI