CHEM1832-Chemistry for Health Science (T1 2025)
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Which of the following is the correct electron configuration for a sulfur atom in its ground state?
ultraviolet, violet, blue, green, yellow, orange, red, infrared
The regions of the electromagnetic spectrum listed above are ordered from left to right by:
Which statement best describes what quantum mechanics indicates about the energy of a particle which has its motion restricted? e.g. an electron bound to an atom.
Calculate the wavelength, in nm, of a photon that has a frequency of 2.62 x 1015 Hz.
Note: c = 2.998 × 108 m s–1.
Nitrosyl bromide decomposes according to the following equation:2NOBr (g) ⇌ 2NO (g) + Br2 (g) A sample of NOBr (0.649 mol) was placed in an empty 1.00 L flask. At equilibrium the flask contained 0.149 mol of NOBr. How many moles of NO are in the flask at equilibrium?
Consider the reaction below, for which K = 0.212 at 100°C.
N2O4 (g) ⇌ 2 NO2 (g)What is the value of K at this temperature for the following reaction?
2 NO2 (g) ⇌ N2O4
Nitrosyl bromide decomposes according to the following equation:2NOBr (g) ⇌ 2NO (g) + Br2 (g) A sample of NOBr (0.65 mol) was placed in an empty 1.00 L flask. At equilibrium the flask contained 0.171 mol of NOBr. How many moles of Br2 are in the flask at equilibrium?
At 1000.0 K, the equilibrium constant for the reaction
2NO (g) + Br2 (g) ⇌ 2NOBr (g) is K = 0.018. Calculate K for the reverse reaction, 2NOBr (g) ⇌ 2NO (g) + Br2 (g).
Consider the following equilibrium reaction:
H2CO3 (aq) ⇌ H+ (aq) + HCO3– (aq); K = 5.0 x 10–7
If the initial concentrations of the species are:
[H2CO3] = 0.080 M; [H+] = 1.00 x 10–5 M; [HCO3–] = 4.00 x 10–3 M
Which one of the statements below describes the relationship between Q and K and then the correct direction of chemical change?
In the coal-gasification process, carbon monoxide is converted to carbon dioxide via the following reaction:
CO (g) + H2O (g) ⇌ CO2 (g) + H2 (g)In an experiment, 0.35 mol of CO and 0.40 mol of H2O were placed in a 1.00 L reaction vessel. At equilibrium, there were 0.15 mol of CO remaining. Keq at the temperature of the experiment is ________.
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