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Which of these ground-state, gaseous ions has the largest number of unpaired electrons?
a) V^2+
b) Cr ^2+
c) Fe ^3+
d) Co ^ 2+
e) Ni ^ 2+
How much of each of the following substances would you add to water to prepare 1.50 L of a 0.90 M solution? NiCl2 from the salt NiCl2·6 H2O
Explain why the number of moles must remain constant for any of the gas laws to apply
The solubility of oxygen in water is 5.00M when the partial pressure of oxygen is 1.00 atm. Calculate the solubility of oxygen in water in contact with air
A 120.0mL buffer solution is 0.105M in NH3 and 0.135M in NH4Br. What amount of HCl could this buffer neutralize before it fell below 9.0 pH
A sample of naphthalene, which should be pure white, was found to have a grayish color after the usual purification procedure. The melting point was correct, and the melting point range was small. Explain the gray color.
a sealed balloon is filled with 1.70 l of helium at 23degc and 1.00 atm. the balloon rises to a point in the atmosphere
The compound noradrenaline contains 56.79% C, 6.56% H, 28.37% O, and 8.28% N by mass. What is the empirical formula for noradrenaline?
write a balanced equation for the decomposition reaction described using the smallest possible integer
With reference to relevant clinical analytes, discuss the use of immunoassay within clinical biochemistry.
chemiluminescence reaction will actually occur very slowly in air. What component of air will bring about this reaction and what is its approximate concentration in air?
Calculate the enthalpy change, , for the process in which 41.5 of water is converted from liquid at 2.1 to vapor at 25.0.
An enzyme reduces the activation energy of a reaction at the temperature of 25 degree celsius from 55 kjmol-1 to 15kJ mol-1 by changing the route of the reaction.
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