Question

eu +352 LH4bhu 20) The minimum energy needed to eject an electron from a sodiu 4.41 x 10-19 J. What is the maximum wavelength of light, in nanometers, tha will show a photoelectric effect with sodium? A) 4.51 x 107 B) 2.22 x 106 C) 451 D) 6.66 x 1014 E) 4.29 x 107 21) When 0.500 mol of CH4(x) reacts with excess Cl2(3) at constant pressure according to the chemical equation shown below, 354 kJ of heat are release Calculate the value of AH for this reaction, as written. 2 CH4(g) + 3 Cl2(g) 2 CHCl3(l) + 3 H2(g) AH = ? A) +1420 kJ B) -1420 kJ C) -708 kJ D) +708 kJ E) -710 kJ 22) Which order is correct for decreasing polarity (most polar first)? S-C1 Si-C1 P-C1 Si-Si A B C D A) A>B>C>D B) B > C>A>D

Answer 1

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