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When a space shuttle re-enters the atmosphere, its temperature rises and it can heat the surrounding air to 1260 degrees celcius. At that temerature some endothermic reactions take place that atlower temperatures are not spontaneous under standard conditions (pure substances, each at 1 bar). Estimate the temperatures at which the following stratospheric reactions become spontaneous under standard conditions. Which ones could occur during re-entry of the space shuttle?
a. The formation of nitrogen monoxide from nitrogen and oxygen
b. the fromation of ozone from molecular oxygen
Calculate [OH-] in the following aqueous solution at 25 deg C: [H3O+] = 3.6×10^?2 M? I know you have to divide 1x10^-14 by the 3.6x10^-2 and the answer I got was 2.8x10^-17 but it said my answer is wrong
Compute how many ml of C2H3NaO2(0.2 M) need to be added to 200 mL of 0.1 M CH3COOH to make a buffer of pH 5 and also find out what would be the total concentration of C 2 H 3 O 2 be in this (acetate + acetic acid) solution ?
The net ionic equation for the reaction, if any, which occurs when aqueous solutions of manganese(II) chloride and sodium carbonate are mixed is
A sample of fresh grapefruit juice was filtered and titrated with the above I2 solution. A 100 mL sample of the juice took 9.85 mL of the iodine solution to reach the starch endpoint.
Solve an equilibrium problem (using an ICE table) to calculate the pH of a solution that is 0.185 M in HC2H3O2 and 0.120 M in KC2H3O2
the tip of a vinegar buret but disappears during the course of the titration, how would this affect your calculation of the concentration of acetic acid
If 35.0 g each of iron and chlorine react, how much FeCl3 will be formed?
The 13C nucleus is a spin 1/2 particle, which means it can orient in two directions in a magnetic field (with the field and against it). The difference in energy between the two orientations is given by:
of the metal ions we tested in the flame, sodium gave the brightest and most persistent color. Do you think that if a mixture of potassium and sodium were burned in a flame, the gross color of potassium could be detected in the presence of sodium
Pretend 32.15 mL of NaOH of the standardized base is required to titrate a 20.00 mL sample of a 1.000 to 10.000 dilution of the mystery acid. What is the concentration of the acid (before dilution)
Calculate the percentage of I2(g) that will be converted to HI(g) at equilibrium at 355 degrees Celsius if 3.00 mol of I2(g) is mixed with 3.00 mol of H2(g).
Given that the radius of the O2- ion is about 140 pm in most oxides, calculate the radius of Mg2+, in pm. Your solution should include a sketch one face of the unit cell of MgO to show how the edge length of the unit cell is related to the ionic r..
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