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The student adds 6 M NH3 to CuSO4 solution until the Cu 2+ ion is essentially all converted to Cu(NH3)4 2+ ion. The voltage of the cell goes up to 0.92 V and the Cu electrode is still negative. Find the residual concentration of Cu 2+ ion in the cell.
An element has 2 naturally occurring isotopes. Isotope 1 has 120.9038 amu and a relative abundance of 57.4%, and isotope 2 has a mass of 122.9042 amu. Find the atomic mass of this element and by comparing it to the periodic table identify it.
Aluminum nitrate and annonium chloride react to produce aluminum chloride, nitrogen and water. what mass of aluminum chloride is present after 43 g of aluminum nitrate and 43 g of amminium chloride have reacted completely
Determining the Lewis structures of small compounds is the first step towards determining the molecular shapes of larger and larger molecules.
What two properties of ATP make it ideally useful for a form of energy storage in cells? Describe why the hydrolysis of ATP is highly exergonic (give at least two reasons).
Toxic cyanide ion, CN-, can be removed from wastewater by reacting it with hypochlorite, ClO-, in aqueous basic solution. The products formed are N2(g), bicarbonate, and chloride ion. What is the sum of the stoichiometric coefficients in the corre..
The vapor pressure of dichloromethane at 0C is 134mmHg. The normal boiling point of dichloromethane is 40C. Calculate its molar heat of vaporization.
What are the H3 O^+ and OH^- concentrations of solutions that have the following pH values? A. pH1 B. pH 13 C. pH 0 D. pH 1.24 E. pH 7.96
The total pressure of the mixture is 1.42 atm. What is the partial pressure of O2 in the mixture? (A) 0.211 atm (B) 0.426 atm
The equilibrium constant for the reaction of bromine with chlorine to form bromine monochloride is 58.0 at some temperature. Br2(g) + Cl2(g) ! 2 BrCl(g) What is the value of the equilibrium constant for the following reaction?
Write a net ionic equation for the precipitation reaction, if any, that occurs when aqueous solutions of the following ionic compounds are mixed. Cu(Ch3COO)2 and Na3PO4.
How do you determine the number of protons and neutrons in an atoms' nucleus and the number of electrons in its first and second shells?
the enthalpy of vaporization of ethanol i 43.5 kj/mole at its normal boiling point of 352 k. using avalue of the molar heat capacity of liquid ethanol of 111.46 j/k/mol
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