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Which of the following transitions in a hydrogen atom would emit the highest energy photon? a) n=1 to n=2 b) n=3 to n=2 c) n=5 to n=1 d) n=2 to n=8 e) n=6 to n=5
How many mL of 0.25 m NaOH solution are required and What is a standard soluyion in an acid-base titration
Plutonium-240 (PU-240) is a byproduct of the nuclear reaction that takes place in a reactor. It takes one thousand years for 10% of a 4.60 g sample to decay. (Nuclear decays are first-order reactions)
0.60 g of hydrogen chloride HCl is dissolved in water to make 7.5 L of solution. What is the pH of the resulting hydrochloric acid solution.
Determine the oxidation of each element in the following compounds: a. CH3COO- b. NaClO3 c. Al2O3
The flue gases then pass through a heat exchanger from which they emerge at 323.15K per mol of methane, how much heat is lost from the furnace, and how much heat is transferred in the heat exchanger
A solution of acetic acid is 40% m/m with density = 1.045 g/mL. Calculate molarity, molality, and mole percent of the acid. Molecular weight of acetic acid = 60.05 g/mol
A sample of H2 gas (2.0 L) at 3.5 atm was combined with 1.5 L of N2 gas at 2.6 atm pressure at a constant temperature of 25 °C into a 7.0 L flask
Which of the following is an accurate comparison of the properties of nitrogen and oxygen. A. Nitrogen uses more oxidation states in its compounds than oxygen does
Phenol is a weak organic acid with Ka=1.0x10^-10. How many grams of phenol do you need to add to 500. mL of water to make a pH=5.75 solution
Calculate the oxygen content of the plasma in mM! 1 ml plasma dissolves 24 uL oxygen at 38 degrees C if the partial pressure is 103 kPa.
For the reaction aA ? Products, use the following choices? a) zero order in A b) first order in A c) second order in A d) a, b, c e) none of the above so what is (1) [A] is constant and (2) the rate is constant over time
Explain why the colour of the light emitted by an element in the gaseous state is characteristic of the element & explain with a sketch diagram how a hydrogen atom, which has only one electron, has so many spectral lines.
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