8. What is the maximum number of electrons in an atom that can have the followin

Question

8. What is the maximum number of electrons in an atom that can have the following set of quantum numbers? a) I b) 2 c) 6 d) 10 Your answer: 19. The standard enthalpy change for the following reaction is given two following reactions: 2CsH,s(l) + 2502(g) 1600a(g) + 1 81 1:0(1) dH--11,020 kJ/mol AH -566.0 kJ/mol a) -4,326 kJ/mol b) -6,492 kJ/mol c) -10,454 kJ/mol d) -11,586 kJ/mol Your answer: 20. The enthalpy change for the combustion of one mole of acetylene, CH2, to form carbon dioxide and water vapor is-1,010.5 k·The reaction is under constant pressure and volume condition. What is the bond energy of C C (BEo-c) in kJ/mol? C-c C-C C-o 0-0 O-H 456 347 620 802 499 462 a) 799 kJ/mol b) 962 kJ/mol c) 1,035 kJ/mol d) 1,277 kJ/mol Your answer:_ 21. How many liters of chlorine Clh gas at 2.50 x 10 °C and 0.950 atm can be produced by the reaction of 12.0 g of Mn02 with excess HCl according to the following chemical equation? The molar mass of MnO2: 86.94 g/mo! and the molar mass of Cl2: 70.9 g/mol, R- 0.0821 L-atm /(mol-K). (K = °C + 273) Mn02(s) + 4HCI(aq)-MnCl2(aq) +2H2O)+ Ch(g) a) 0.138 L b) 0.282L c) 1.09 L d) 3.55 L Your answer

Explanation / Answer

Since you have answered first one correctly , let me help you out with the next.

Ans 19 : b) -6,492 KJ/mol

Let us number the two given equations as 1 and 2 .

Now to calculate the enthalpy of the desired reaction :

Multiply equation 2 by 8 , and then subtract it from equation 1.

So the enthalpy of the reaction = -11,020 - 8(-566.0)

= -6,492.0 KJ /mol

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