One metric ton (1000 kg) of coal is required to produce 7.3 MW-hr of electrical energy. In 1993, the Thomas Hill power plant (a small, coal-fired plant supplying rural electric cooperatives) produced 7100000.0 MW-hr. If low sulfur (1%) coal were used, and the gaseous effluent were the only means of discharging the sulfur, what v ...continues
Please do ONLY if you're positive! The program I use is very picky :(
13. Taking the mass of the atmosphere to be 5.6E15 metric tons, what mass of carbon must be burned in order to increase the average carbon dioxide level in the atmosphere by 0.5ppm by volume (in metric tons)?
re: daytime concentration of OH; molar concentration
25. The daytime concentration of OH in continental air averages 6.9E6 molecules per cubic centimeter. Calculate its molar concentration.
Word prob inv. ppm, STP, concentrations
28. The air inside a garage was found to contain 28.00 ppm CO by volume at standard temperature and pressure (STP). What is the concentration of CO in ppm by mass? Please accept ONLY if you're positive! My computer program is very picky and likes to tell me the answers are wrong!
calculate mass % of meth, eth, and MTBE in gasoline. I have NO clue where to even start!
38. Calculate the mass percent of methanol, ethanol, and MTBE (answers must be received in that order) that must be present in gasoline to yield a mixture of 1.8 % oxygen by weight.
Calculate levels of lead in blood; density, concentrations, etc
44. The concentrations of lead in blood samples are often reported in units of micromoles of lead per liter of blood. Calculate the value of the concentration in these units of a blood sample containing 45 ppb lead, assuming that the density of blood is one gram per milliliter. Please only answer if you're 100% positive! My c ...continues
Calculate fraction of cyanide existing as the anion; pH, etc
100. For HCN in water, Ka = 2.0E-10. Calculate the fraction of cyanide that exists as the anion rather than in the molecular form at pH values of 4, 7, and 10 (provide answers in that order). Please only answer if you're 100% sure you're right. My computer program is very picky and likes to tell me the answers are wrong! Than ...continues
Calculating pE value; equilibruim; volume of O2; and pH
19. What is the pE value in a solution in equilibrium with air (18% O2 by volume) at pH 6.00? ******PLEASE do this only if you're 100% positive you're right. My computer (program) is very picky and likes to tell me the answers are wrong :( Thanks!
20. What is the pE value in an acid mine water sample having [Fe3+] = 6.79E-3 M and [Fe2+] = 4.14E-4 M? ******PLEASE do only if 100% positive you're right. My computer program is very picky and likes to tell me the answers are wrong :( Thanks!
pH, ionization, acid dissociation.
29. The pH of a sample of rain is found to be 3.3. Calculate the percentage of HSO4- that is ionized in this sample, given that the acid dissociation constant for the second stage of ionization of H2SO4 is 1.2E-2. PLease do this only if you are 100% positive you're right. My program is very picky and likes to tell me the answ ...continues
