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Explain why BaCO3 is soluble in aqueous HCl, but BaSO4, which is used to make the intestines visible in X-ray photographs, remains sufficiently insoluble in the HCl in a human stomach so that poisonous barium ions do not get into the bloodstream.
2NOCl(g) → 2NO(g) + Cl2(g) ,At 450 K the rate constant is 15.4 atm-1s-1. How much time (in s) is needed for NOCl originally at a partial pressure of 46 torr to decay to 25.8 torr.
What mass of P4 is produced when 41.5 g of Ca3(PO4)2, 26.5 g of SiO2 and 7.80 g of C are reacted according to the equation: 2Ca3(PO4)2 + 6SiO2 + 10C ¼ P4 + 6CaSiO3 + 10C
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.15×1014 {rm s^{-1}} when it is exposed to visible light of wavelength 4.76×10-7 {rm m}.
what product would you expect to obtain from addition of Cl2 to 1,2-dimethylcyclohexene? Show the stereochemistry of the product.
Acetylsalicylic acid (aspirin), HC9H7O4, is the most widely used pain reliever and fever reducer in the world. Find the pH of 0.018 M aqueous aspirin at body temperature (Ka at 37°C = 3.6 10-4).
Calculate the values for T (in K), w, delta U, and delta S. Neglect PV quantities for water and assume ideal behavior for water vapor.
What mass of water would need to evaporate from your skin in order to dissipate 1.7 × 105 J of heat from your body? H2O(l) → H2O(g) ΔHvap = 40.7 kJ/mol
Calculate the APF for (a) the simple cubic and (b) body centered cubic lattices as volume of atoms/volume of cell. (c) Which structure is more dense given atoms of equal mass? The edge length for simple cubic is 2r. Remember that each corner atom ..
Example: Determine the solubility of calcium fluoride at 25C. And Be sure to note the difference between Solubility and Solubility Product Constant ! What could we do to change the system and produce a precipitate?
if a 210 mg piece of gold (density=19.32 b/cm^3) is hammered into a sheep measuring 2.3*10 ft. what is the average thickness of the sheet in meters?
Which of the following ionic compounds will be more soluble in acid solution than in water? Explain your choice/s
250.0 ml of 3.0M HCl are added to 400.0 ml of 6M HCl. Assuming that the volumes are additive, what is the final concentration of HCl
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