Consider a N₂ molecule in its first excited electronic state, that is, when an electron in the highest occupied molecular orbital (HOMO) is promoted to the lowest unoccupied molecular orbital (LUMO). Identify the molecular orbital involved and sketch a diagram to show the transition. Compare the bond order and bond length of N₂* with N₂, where the asterisk denotes the excited molecule. Is N₂* diamagnetic or paramagnetic?

What is the mean of the values 8.9, 9.0, 4.0, 7.0, and 3.0? Give your answer to the first decimal place.

Perform the calculations and determine the absolute and percent relative uncertainty. Express each answer with the correct number of significant figures. To avoid rounding errors, do not round your answers until the very end of your calculations. [9.8 (+0.3) - 2.31 (+0.01)] 8.5 (+0.6) absolute uncertainty: + percent relative uncertainty: + 8 9.2 (+0.4) × ([5.4 (±0.3) × 10−³] + [5.6 (±0.1) × 10−³]) = absolute uncertainty: ± 0.005 percent relative uncertainty: + % %

what is the average time of these 4 times? 2:min 46sec 2min 52sec 3min 37sec 3min 54sec

35.6m to ft

A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of chloroform, ethanolamine, dimethyl sulfoxide, pentane, and carbon tetrachloride. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: liquid chloroform density 1.5 g cm 3 ethanolamine 1.0 g-cm dimethyl sulfoxide 1.1 g cm pentane 0.63 g-cm carbon tetrachloride 1.6 g-cm Next, the chemist measures the volume of the unknown liquid as 0.688 L and the mass of the unknown liquid as 543. g. Calculate the density of the liquid. Round your answer to 3 significant digits. Given the data above, is it possible to identify the liquid? If it is possible to identify the liquid, do so. gcn cm yes no chloroform ethanolamine dimethyl sulfoxide pentane carbon tetrachloride X 5…

AgBr AgCl Ag₂ CrO4 5.35x10-13 1.77x10-10 1.12×10-12

Calculate the equilibrium constant for each of the reactions at 25°C. Standard Electrode Potentials at 25 °C Reduction Half-Reaction E° (V) Fe+(aq) + 3 e → Fe(s) -0.036 Sn²+ (aq) + 2 e → Sn(s) -0.14 2+ Cu" (ag) + 2 е — Cu(s) 0.16 O2 (g) + 2 H2O(1) +4 e¯ →4 OH (aq) 0.40 Cl2(9) + 2 е —2 CI 1.36 I2(s) + 2 e → 2 1 0.54

The world population is estimated to be 7.4 x 109. Nauru is the smallest island nation and comprises 1.5 x 10-4% of the world population. If the percentage of left-handed people is approximately 12%, estimate the number of left-handers on the island of Nauru.

14.3462 +2.55 Express your answer in appropriate significant figures. — ΑΣΦ ftermitte ΠΡΕΠΕΙ Ν