Question

34) What pressure will 14.0 g of CO exert in a 3.5 L container at 75°C? 

A) 4.1 atm B) 5.0 atm C) 6.4 atm D) 1.1 atm E) 2.3 atm 

35) What pressure would a gas mixture in a 10.0L tank exert if it were composed of 48.5 g He and 94.6 g CO2 at 398 K? 

A) 39.6 atm B) 7.02 atm C) 32.6 atm D) 46.6 atm E) 58.7 atm 

36) Determine the volume of O2 (at STP) formed when 50.0 g of KClO3 decomposes according to the following reaction. The molar mass for KClO3 is 122.55 g/mol. 2 KClO3(s) → 2 KCl(s) + 3 O2(e) 

A) 9.14 L B) 8.22 L C) 12.3 L D) 13.7L E) 14.6L 

37) A sample of copper absorbs 43.6 kJ of heat, resulting in a temperature rise of 75.0°C, determine the mass (in kg) of the copper sample if the specific heat capacity of copper is 0.385 J/gºC. 

A) 1.51 kg B) 6.62 kg C) 1.26 kg D) 7.94 kg E) 3.64 kg

Answer 1

Dear Student, Kindly refer to the complete solution. Feel free to ask if you face difficulty in understanding any step of the solution attached, so that we can assist you in a better way.

Dear student, 10 Applying Ideal gas equation, PyonRT where P = Pressure = e Va volume = 3.5L n= no. of moles = not = 149 mol.ut 28ginal R = 0.0821 Lath kt mot (universal gas constant) T: 75°c = (45+243.15)k z 348.15k P = nRT = 14g x0.0821 Latmk mal & 348.15k 28 gimol x 3.5L p24.latm e Pressure = P Het Pela Pa RT + MERCAT (Mmet "cos) KI P.T.O.

z Wt. Het Wtio atomic wt mol-wt (48.5 x 0-0821 Latmk mał X3988 almol وم) (12.125+ 2.15) mol x 0.0821 Cotas X298 K molt LOL = 46.6 atm ③ The Reaction provided is :- akug(s) - 2 KCl (s) + 30 g) at STP, Imoles of keeg - 3x22.42 of 2 g 1 mole of Kug - 3x22.422 09) moles g rus, provided we = 0.408 mol ..0.408 mel q kuog (x 22.4x0408) : = 13- 7 l P: 7.0

9 qlheat) = 43.6 kJ ? 43.6x100J AT = 75°C ma? specific heat a c= 0.385J/g °c Apply formula, • mc ДТ me q ДТ & 43.641000 J 0-385J/gºC x 75°C = 1509.95g ~ 1.51kg Best wishes!!