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A sample of 2 g of nitrogen can be combined with 2.285714 g of oxygen to form nitric oxide gas (NO). What mass of oxygen would be required to convert the same sample of nitrogen to nitrogen dioxide (NO2) instead?
When a solution of A is mixed with one containing B- ions, the color changes from green to red. Which species is oxidized?
A laser pulse with wavelength 555nm contains 4.40mJ of energy. How many photons are in the laser pulse.
which ions in water make it 'hard'? is it possible to test for only one of these ions quantitatively in the presence of the other.
At 600 degrees C, the equilibrium constant for the reaction 2HgO(s) --> 2Hg (l) +O2 (g) is 2.8. Calculate the equilibrium constant for the reaction 1/2O2(g) + Hg(l) --> HgO (s)
a sample of gas mixture from a neon sign contains 0.0856 mol ne and 0.0254 mol kr. what are the mass percentages of ne and kr in the gas mixture?
How many grams of oxygen (O2) are needed to completely react with 2.40 g of propane (C3H8) according to the equation below?
What mass of benzoic acid, would you dissolve in 300.0 of water to produce a solution with a = 2.75?
What is the molar mass of mixture A and mixture B? Show detailed work for first and best rating.
Calculate the enthalpy of the reaction: 2NO(g) + O2(g) --> 2NO2(g) given the following reactions and enthalpies of formation: 1/2 N2(g) + O2(g) --> NO2(g), delta H *A = 33.2 kJ 1/2 N2(g) + 1/2O2(g) --> NO(g), delta H *B= 90.2 kJ
Show your calculations and determine the half-life of Tc-99 (in hours). (b)The delivery of a sample of Tc-99 from the reactor to the nuclear medicine lab of the hospital takes 3h.
solution of water (Kf = 1.86^ C/m) and glucose freezes at - 2.55^ C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 ^ C.
An overly efficient student simultaneously prepared two titration mixtures, consisting of diluted bleaching solution, KI solution, and HCI solution.
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