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Calculate the wavelength of light emitted from a hydrogen atom when it undergoes a transition from the n=11 level to n=5. µm
It is the peak of WWI and German scientist Haber is making ammonia for munitions production. This is initially a slow process but the laboratory has enough money for top of the line equipment. How could this scientist speed up the process
What property of the atom did Moseley associate with the wavelength of X-rays emitted from an element in his experiments?
How many different tripeptides can be made from two molecules of glycine and one molecule of histidine
a solution is made from mixing compounds A, mole fraction 0.5833, and B mole fraction 0.417. the vapor pressure of A at 55c is 95 mmHg and the vapor pressure of B at the same temperature is 42 mmHg
A solution is prepared by dissolving 0.16mol of acetic acid and 0.16mol of ammonium chloride in enough water to make 1.0 L of solution.
Ethane and bromine react immediately after being irradiated with UV light. When irradiation stopped, the rate of reaction decreases, but the reaction does not stop immediately. Explain.
A student weighed 0.0961 g of calcium carbonate (FW: 100.08 g/mol) into a 100-mL volumetric flask, dissolved the powder using nitric acid, and diluted to the mark with 0.2% nitric acid.
What is the value of deltaH0 (in kJ) for the reaction described below. Assume the reaction is performed at 250C. C2H2 (g) + 2H2 (g) -----> C2H6 (g) a. - 248 b. - 311 c. - 173 d. 236
Sodium Borohydride reacts slowly with water (and even more slowly with ethanol) to generate H2. What observation would allow you to deduce that H2 is being generated either during your reaction or when you pour the reaction mixture into water
how many milliliters of a stock solution of 2.00 m kno3 would you need to prepare 100.0 ml of 0.150M KNO3
A ground-state H atom absorbs a photon of wavelength 94.91 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 1281 nm to reach an intermediate level, and a second to return to the ground state.
Nitrogen and hydrogen combine at high temperature, in the presence of a catalyst, to produce ammonia. N2(g)+3H2(g)-->2NH3(g) Assume 4 molecules of nitrogen and 9 molecules of hydrogen are present.
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