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A line in the Balmer series of hydrogen has a wavelength of 434 nm. From what state did the electron originate?
Ni=?
In what region of the electromagnetic spectrum is this line observed?
a) microwavesb) visiblec) infraredd) gamma rayse)radiof) ultravioletg) X rays
what is the species list when titrating with hydrochloric acid? Aniline (benzenamine) has the formulas C6H5NH2. Its conjugate acid is C6H5NH3+.
a)the air from a large building at 68C. b) the air froma small house at 68C. c)the air from a small room temperature at 71C
Determine which flask has the smallest amount of water vapour and which one has greater vapor pressure of H 2 O?
The total volume of hydrogen needed to fill the Hindenberg was 2.0x10^8 L at 1.00 atm and 25 C. How many kilojoules of energy were evolved when it burned?
An unknown solid mixture containing benzoic acid,copper(II)sulfate and sand. She added 15mL.of acetone to her sample. Which component of the mixture dissolved in the acetone?
Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl2 gas is 8.60 L at 899 torr and 28°C.
Calculate the number of moles of H2O that will be produced by the reaction of .530 moles of solid Al(OH)3 with excess aqueous HClO3
A certain quantity of a gas occupies 61.3 mL at 68C. If the pressure remains constant, what would the volume of the gas be at 17C?
Find the volumes required of Catechol and Ethanol to create a mixture of 50uM Catechol and 50uM Ethanol. Both solutions are 5mM stock
What is the empirical formula of a hydrocarbon which produces 2.703 g CO2 and 1.108 g H2O
You are given the following data. S(s) + 3/2 O2(g) → SO3(g) ΔH = -395.2 kJ 2 SO2(g) + O2(g) → 2 SO3(g) ΔH = -198.2 kJ Calculate ΔH
For reaction a+ b = c the colorless reactants produce deep red complex. Heating makes the color dissapear. Once cooled the deep red color retuns
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