Description Lead(II) oxide is obtained by roasting galena, lead(II) sulfide, in air. PbS(s) + O2(g) PbO(s) + SO2(g) (a) Balance the equation. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.) chemPad Help 2PbS(s) + 3O2(g) ? 2PbO(s) + 2SO2(g) Correct. Determine the theoretical yield of PbO if 224.5 g PbS is heated. g (b) What is the percent yield if 160.0 g PbO is obtained? %
Description Metallic vanadium crystallizes in a body-centered cubic lattice, with one V atom per lattice point. If the metallic radius of V is 130 pm, what is the volume of the unit cell in pm3 and in cm3? pm3 cm3
Description Predict whether S for each reaction would be greater than zero, less than zero, or too close to zero to decide. I2(g) + Cl2(g)2ICl(g) COCl2(g)CO(g) +Cl2(g) CO2(g) + H2(g)CO(g) + H2O(g) 2H2S(g) + 3O2(g)2H2O(g) + 2SO2(g) 2H2O2(l)2H2O(l) +O2(g) S > 0 S < 0 too close to decide
Description The freezing point of benzene C6H6 is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is DDT . How many grams of DDT, C14H9Cl5 (354.5 g/mol), must be dissolved in 245.0grams of benzene to reduce the freezing point by 0.400°C ? g DDT.
Description I must show work to get credit. 1.What is the empirical formula of a substance composed of 56.6% potassium, 8.68% carbon, and 34.7% oxygen? 2. What is the empirical formula of a substance composed 49.89% strontium 13.67% carbon and 36.44% oxygen?
Description A sample of a compound contains 0.150 mol C, 0.105 mole H, 0.0300 mol O, and 0.0450 mol N. The molecular mass of the compound is found to be 402 g/mol. What is the compound's chemical formula?
Description Perchloric Acid(HClO4) is a very strong acid. When 10.0mL of 9.20M HCl is diluted to a final volume of 10.0L, what will be the pH of the resultant solution ?
