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An inexpensive hygrometer often used by cello players in Minnesota is based upon the color changes of cobalt(II)chloride as the relative humidity of the atmosphere changes. When the air is dry the color is blue; when the air is moist the color is pink. Suggest an explanation of these color changes. Suggest why Minnesota cello players use hygrometers.
what is the lewis structure of C2H2Br2, also is it polar or non polar, are there any resonance structures or isomers?
Write balanced net ionic equation for the neutralization of equal molar amounts of HBr and NH_3
The weak acid AH4 has how many buffering regions. Can anyone explain how to approach this type of problems
A concentrated solution of compound A in the same solvent was diluted from an initial volume of 2.00 ml to a final volume of 25.00 mL and then had an absorbance of 0.733. What is the concentration of A in the concentrated solution
The Gibbs free energy of formation of solid iron (III) oxide is the Gibbs free energy change for the reaction
Calculate the velocity of a nucleus given that it has 4 neutrons, 4 protons, a wavelength
solar radiation is 1200 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 for solar radiation.
The change in enthalpy (delta S standard) for a reaction is -31.7 kJ/mol. The equilibrium constant for the reaction is 4.4×103 at 298 K. What is the equilibrium constant for the reaction at 644 K
universe on assumption that heat capacities are independent of temperature
In a study of the effect of temperature on halogen decomposition. 0.50 mol of I2 was heated in a 2.5 L vessel and the following reaction occurred. I2 (g)--> 2I (g)
Draw the pictures of the overlap of the atomic orbitals to make all of the molecular orbitals and for any non-bonding orbitals as well.
Calculate the mass of carbon dioxide released when 255 g of copper carbonate [molar mass = 123.5 g/mol] is heated (assuming that the reaction goes to completion). The molar mass of CO2 is 44.0 g/mol.
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