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By chemical study the composition of zinc chromate is 36.05% zinc, 28.67%chromium, and 35.28% oxygen. Compute its empirical formula.
What is the concentration of [Cr2O7 ^-2] in the first dilution add that is made by adding 1.00 mL of DI water to 5.00 mL of the stock potassium dichromate solution?
What minimum OH- concentration must be attained (for example adding NaOH) to decrease the Mg2+ concentration in a solution of Mg(NO3)2 to less than 1.1e-10 M
Calculate the amount of heat required to completely sublime 14.0 g of solid dry ice (Co2) at its sublimation temperature
Make the 3 polynomial functions a0, a1+b1x, a2+b2x+c2x^2 orthonormal in the interval -1
Given the standard free energies of formation, what is the value of for the cell reaction?
The four molecular p orbitals of the four carbon atoms can be lined up parallel in order to create four new molecular orbitals. The electrons in the new molecular orbitals benefit because they are not confined to just one atom.
calculate the molar enthalpy of evaporation of water at 100 celcius?
An aqueous solution contains 12.5% NaCl by mass. What mass of water (in grams)is contained in 2.5L of the vapor above this solution at 55 celcius? the vaor pressure of pure water at 55 celcius is 118 torr.
A) aqueous naoh and ch3ch2co2h B) aqeous naoh and c6h5so3h c) ch3ch2Li in hexane and ethyne d) ch3ch2Li in hexane and ethyl alcohol
Determine the standard reaction enthalpy for the partial combustion of methane to carbon monoxide according to the following reaction:
The atomic radius of O is smaller than the atomic radius of Se. What is the effective nuclear charge for the valence electron(s) in O and Se
whether these collisions are elastic or inelastic makes no difference as long as the walls are at the same temperature as the gas. Explain. Explain the kinetic molecular theory of gases
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