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An atomic emission spectrum of hydrogen shows three wave lengths : 1875 nm, 1282 nm, 1093 nm. Assign these wavelengths to transitions in the hydrogen atom. If you could just do one wavelength, that would be great.
Sulfamic acid, HSO3NH2 (molar mass = 97.1 g/mol), is a strong monoprotic acid that can be used to standardize a strong base: HSO3NH2(aq) + KOH(aq) --> KSO2NH2 (aq) + H20(l)
Hydrazine, ammonia, and hydrogen azide all contain only nitrogen and hydrogen. The mass of hydrogen that combines with 1.00g of nitrogen for each compound is .144, .216, and .240, respectively.
if all ionic substances are completely ionized the aqueous solution with the? lowest freezing point would be ??a 0.25 m
Calculate the change in entropy (deltaS) when one mole of diamond is heated from a temperature of 0 K to 400 K at a constant pressure of 1 bar
The molar heat of fusion of tungsten is 33.7kJ/mol. What mass of tungsten can be melted by the addition of exactly 150cal at its melting point
Five grams of the specified pure solvent is placed in a variable volume piston. What is the volume of the pure system when 50% and 75% have been evaporated at: (i) 30 deg C (ii) 50 deg C?
If 3.17 moles of ethane, C2H6 undergo combustion,according to the unbalanced equation C2H6+O2--> CO2+H2O, how many moles of oxygen are required?
a) Catalyst works by lowering action barrier of rate limiting step. b) In a 1st order reaction, concentration of reactant is doubled then rate of reaction is doubled. c) equilibrium constant for reaction will never be affected by changing the concent..
sodium borohydride reduction experiment write the balanced equation for the reaction and calculae the percent yield
How many mL of .125M AgNO3 and mL of .839M NaCl are needed to react and produce 1.000 gram of solid AgCl
a sample of water contains 0.010 ppm lead ions pb2calculate the mass of lead ions per liter in this solution assume the
At 0.0oC, if the volume of air is 2.9 mL and the pressure of the atmosphere that day is 675 mmHg, what is the number of moles of air?
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