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Calculate the standard emf of a cell that uses the Mg/Mg2+ and Cu/Cu2+ half-cell reactions at 25°C
The molecular geometries for H2O and SO2 are bent. The H-O-H bond angle in H2O is about 109degrees, whereas the bond angle for O-S-O is about 120degrees, EXplain using lewis diagrams why the molecules have the same molecular geometry but different..
A mixture of carbon and sulfur has a mass of 9.0 g. Complete combustion with excess O2gives 22.7 g of a mixture of CO2 and SO2
Include square brackets around the coordination complex. Do not include the oxidation state on the metal. Use parentheses only around polyatomic ligands. For ethylenediamine use (en) in the formula.
The rate constant of a first order reaction is 3.46x10 to the -2 at 298K. What is the rate constant at 350K if the activation energy is 50.2 kJ/mol
A sample of magnesium wieghs 26.1 mg. How many moles of magnesium are there in the sample? Calculate the mass of one mole of the ionic compound that forms from strontium an dbromine.
A 2.32 L balloon contains helium at 1.00 atm and 25°C. How many grams of helium are contained in the balloon.
He begins to characterize this potentially novel molecule by dissolving 9.9 mg of it in 855 mg of cyclohexane and finds the melting point of the resulting solution is 6.30C.
What is the concentration of a solution formed by diluting 25.0 mL of a 3.2 M NaCl solution to 135.0 mL.
calcium crystallizes with a body-centered cubic structure a)how many Ca atoms are contained in each unit cell? b)how many nearest neighbors does each Ca atom posses
What is the heat change per mole of CaCl2 dissolved in water? Assume that all the heat is absorbed by the water. (c = 4.18 J/g C)
How much CH4, in grams, is needed to produce 50.0 grams of CHCl3?
you have 75.0 ml of a 2.50 m solution of na2cro4aq. you also have 125 ml of a 1.52 m solution of agno3aq. calculate the
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