Question

CHEMISTRY DEPARTMENT SANTA ANA COLLEGE S. How many grams of sulfur was burned if 80.0 g of sulfur dioxide was formed? - St 2 7 502 140.075 80.0, soz Imoll 80 64.069 502 Imol s 32.067 mol s0₂ Timola 6. H₂SO4 How many grams of zinc are needed to produce 10.0 g of hydrogen from sulfuric acid? soy & th H2604 7. How many grams of sodium chloride are needed for the double replacement reaction with 0.0 g) of silver nitrate in aqueous solution? Nach & AgNO3 → NaNO₃ + Agul. 10.0g AgNO₃ Imol AgNO3 58.44 g Nach all - 3.44 g Nach 134 169.07g Agnoz I Imol Nach 8. Some cares can use butane (C4H10) as fuel. How many kilograms of oxygen is needed for the complete combustion of each kilogram of butane? nstructors Initials Worksheet 11

Answer 1

... 6. The combustion reaction of sielphier is . SO2 . 5 +0, - > SO2 . 1 mole of . s. gives I mole of. 5o2. :.4.2, 32 g mole' of s = 64 g molet of sony or, 64 g mole" of so, gas produced from 32 g molet of s : .80 gmole of so 32 x 80 g ofs Nath 64 This, = 40 g of s mass of sulphur required = 40 g : to freelecce so g of 502

en 't H₂ SO → ZnSO4 + H₂7 needed o 1 mole of an ato liberate i mole of He gas. lie., 65.4 g of Zn needed to liberate zo of He gas. or .2.9. of. Ha gas = 65.4 g molet of zi 109 of He gas = 65.4 xio 9 of Zn: = 327 g of Zn. ... Thus, to liberate Log of H₂ gas, 327.9 of Zn .. must react with H2SO4: Ars © The doceble displacement reaction is Nace + Ag Noz - NaNO3 + Agce. Given; mass of AgNO3= 109 i Moles of AgNO3 = 10 g - . 169.87 gmolet = 0.059 mole From the reaction i male of Nace So, 0.059 mole 0.059 mole reacts with I mole of AgNO3i AgNaz would require Nall...

1 Theis, mass of Nace = 0.059 male x 58.44 gmole! required = 3.44 g As Ars © The combustion reaction is Ca Ho +1302 400, + 5 H20 (= 1 kg) Given', mass of butane = .1000g ..::. . Moles of butane = 1000g .: 58:12 indlet 17.21 mide ... since 12e mole of Or I mole of a hio require for complete combustion :: 13x17.21. : 17.21 mile of C4H10 = - a mole of move 0 . 21 = .111.84 moles TER This mass of O2 require - 111:84. implex 32 gmole! for complete combustiano .:of Ca Hin = 3578.88 : = 3.578 kg