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What is the solubility of CaF2 in a solution that has an equilibrium concnetration of 0.01 M EDTA ^ 4- (aq)? Ksp (CaF2) = 3.9 x 10^-11 and Kf for [Ca(EDTA)]2- = 5.0 x 10^10
A) 0.17 MB) 4.6 x 10^-5 MC) 0.067MD) 2.1 x 10^5 ME) 1.95M
a particular sample of rainwater is 0.2 ppb. Assume the density of rainwater is close to 1.00 g/mL and find the molar concentration of C20H42.
A 0.150-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium. Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
Calcium sulfide has a face-centered cubic unit cell with calcium ions in octahedral holes. If the radius of sulfide ion is 184pm and the density of CaS is 2.60 g/cm3.
An ice cube of mass 9.0 is added to a cup of coffee, whose temperature is 85 and which contains 110 of liquid. Assume the specific heat capacity of the coffee is the same as that of water.
how many grams of water can be cooled from 45circ rm c to 20circ rm c by the evaporation of 65 rm g of water? the heat
The Fe^2+/Fe half-cell reduction potential is -0.41 V, and the H+/H2 half-cell reduction potential is 0.00 V. What is the value of Eo for this cell, and which electrode is the anode
Suppose that an excess of propane, C3H8 burns in 320 g of O2. How many moles of H2O will be formed? C3H8 + 5 O2 → 3 CO2 + 4 H2O
A student attempted to identify an unknown compound by the method used in this experiment. she found that when she heated a sample weighing 0.4826 g, the mass barely changed
How do the two graphs compare if the frequency factor of the second reaction is higher than the frequency factor of the first reaction but the two reactions have the same activation energy?
Write down the full Hamiltonian for a He atom moving freely in space, i.e., there is no external potential. b) Now assume there is no repulsion between the electrons
The reaction CH4+2O2==CO2+2H2O is exothermic. Which of the following will drive the reaction to the right? A. a decrease in temperature B. an increase in temperature C. addition of a catalyst D. removal of CH4
Determine whether the following are acids or bases: C5H5N, CH3COOH, C6H5SH, and CH3CH2NH2
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