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How much energy is emitted when electron in hydrogen atom undergoes a transition from n=5 to n=2 level? what is the wavelength of this emission? what is the frequency?
Which enzymes of the glycolysis pathway catalyze irreversible reactions
0.554g sample that is a mixture of oxalic acid, H2C2O4 and another solid that does not react with sodium hydroxide. If 29.58 mL of 0.550 M NaOH is required to titrate the oxalic acid in the 0.554g sample to the equivalence point
the steam distillate contains a significant quantity of water, along with the cyclohexanone. how is the water removed from the steam distillate?
C double bond O x2 for the first reaction and in the second reaction the CO has a tripple bond i've tried to do this several times and have gotten 166.5 kj/mol 81kj/mol and 48.5 kj/mol and all of them are wrong
What volume of hydrogen gas is produced when 68.4 g of iron reacts completely according to the following reaction at 25 C and 1 atm iron (s) + hydrochloric acid (aq)--------- iron(II) chloride (aq) + hydrogen (g)
Estimate the time it will take to flush 99% of the discharge from the lake. Immediately after the spill, the lake, completely mixed, has a pH of 8 and the total molar concentration of nitrogen species (NH3 and NH4+) is 7.1×10-4 mol/L. what is the ..
write a balanced equation for the reaction between the iodide ion, a peroxide, and the hydrogen ion.
An 11.2 liter flask at 0 degrees C contains one mole of oxygen, two moles of nitrogen and three moles of helium. What is the pressure in the flask
the definition of Lewis acid and base but when the problem like below is given i don't know what to do. Can you thoroughly explain step by step to figure out which is which?
A liquid unknown was found to be insoluble in water and soluble in cyclohexane and alcohol; the unknown was found to have a boiling point of 58 degrees C at 670mm Hg
If the partial pressure of oxygen drops below 100.0 mmHg, passengers become drowsy. If this happens, oxygen masks are released. What is the total cabin pressure at which oxygen masks are dropped
If the mass of water surrounding the calorimeter was exactly 1000 g and the heat capacity of the bomb calorimeter was 1.75 kJ/°C, calculate the molar heat of combustion of liquid methanol .
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