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The coverage of corrosion in the steel reinforcing rods rebar of concrete is calculated by the galvanic cell shown in the diagram of the instrument. The half-cell of the probe is habitually a AgCl/Ag redox couple:
AgCl + e-= Ag Cl- (1.0 M) E standard= 0.23 V
Corrosion is said to be severe if the cell potential is calculated at greater than 0.41 V. Under these conditions, Explain what is the iron(II) concentration on the rebar?
Fe 2+ + 2e-= Fe E standard= -0.44 V
Is it possible for a salt of formula AB3 to have a face-centered cubic unit cell of anions with cations in all the eight available holes. Explain.
How many moles of carbon monoxide are needed to produce 48.0 L of hydrogen gas according to the following reaction at 0 C and 1 atm carbon monoxide (g) + water (l) ------carbon dioxide (g) + hydrogen (g)
What is the silver ion concentration in a solution prepared by mixing 457 mL of 0.373 M silver nitrate with 475 mL of 0.442 M sodium phosphate?
A sample of gas originally at 37.2oC and 1.25 atm pressure in a 3.4 L container is allowed to expand until the pressure is 0.73 atm and the temperature is 14.9oC.
Calculate the pH at the equivalence point for titrating 0.170 solutions of each of the following bases with 0.170 M HBr.
their molecules or ions are in close contact and do not move. a change of state or phase transition is a change of a
What happens to the pattern if we try to determine which slit the electron goes through by using a laser placed directly behind the slits
Complete and balance te following half-reaction. in each case indicate whether the half-reaction is an oxidation or a reduction. 1.Mo^3+(aq)-->Mo(s)(acidic or basic solution)
A 100.0-L flask contains a mixture of NO2 gas and CO gas. If the concentration of NO2 is 5.5 × 105 ppm, and the total pressure is 790 torr, what is the partial pressure of CO in the flask?
Compare the molar solubility of AgOH in pure water, with that in a solution buffered at pH 7.00. Note the difference between the two cases: when AgOH is dissolved in pure water, the pH does not remain at 7. The value of Ksp for AgOH is 1.5x10-8 at..
What are the values of (i) the pressure, (ii) the molar fraction of benzene in the liquid phase, and (iii) the molar fraction of benzene in the vapor phase when 1/4 the initial vapor phase has condensed
Is the energy that an electron has in the first energy level of atom A the same as the energy that an electron would have in the first energy level of aom B
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