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What is the concentration of the Pb(NO3)2 in the voltaic cell pictured above when Ecell=0.524V at room temperature? ( ? moles of Pb(NO3)2 and 1 mole of Zn(NO3)2)
We add excess Na2CrO4 solution to 16.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.380 grams.
Which of the following elements are diatomic gases at 25 degrees celsuis and one atm: H, He, C, N, O, F, Ne, P, S, Cl, Ar, Se, Br, Kr, I, Xe, and Rn?
The density of aluminum is 2.70 g/cm3 and the density of chromium, is 7.19 g/cm3. If equal masses of aluminum and chromium are transferred to equal volumes of water in separate graduated cylinders, which graduated cylinder would have the greatest ..
Describe how this observation is consistent with the law of conservation of charge.
Use bond enthalpies to estimate the enthalpy change for the following gas-phase reaction.
The atmospheric pressure in La Grande (683 atmospheric pressure) is significantly lower than that of Portland (760 normal pressure). How would the boiling points of a liquid compare in these two locations? Why?
Enough of a monoprotic acid is dissolved in water to produce a 0.0189 M solution. The pH of the resulting solution is 6.25. Calculate the Ka for the acid.
A solution of 62.4 g of insulin in enough water to make 1.000 L of solution has an osmotic pressure of 0.305 atm at 25°C. Based on these data, what is the molar mass of insulin?
How many grams of Na3PO4 is needed to produce 575mL of a solution that has a concentration of Na+ ions of 1.50M?
Draw the Lewis structure for each of the following molecules or ions, and predict their electron-domain and molecular geometries.
Calculate the percent composition by mass of C, H, and O in cinnamic alcohol. How many molecules of cinnamic alcohol are contained in a sample of mass 0.469g.
Calculate the amount of of cobalt(II) nitrate hexahydrate [Co(NO3)2*6H2O] needed to prepare 50 mL of a .15 M cobalt(II) nitrate stock solution.
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