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What mass of NaOH is needed to precipitate the Cd2+ ions from 48.0 mL of 0.500 M Cd(NO3)2 solution?
Consider 48.5 mL of a solution of weak acid HA (Ka = 1.00 * 10-6), which has a pH of 4.350. What volume of water must be added to make the pH = 6.000?
If 10.0 mL of .300 M KOH are required to neautralize 30.0 mL of gastric juice (HCl), what is the molarity of the gastric juice?
Elemental exonium (not a real element) consists of two major isotopes
Calculate the ratio of rates of effusion of O2 versus Cl2. Record your answers to three significant figures. The concentration of CO2 in the atmosphere is 375ppm (by volume). What is the mole fraction of CO2 in the atmosphere?
The enthalpy of formation of ethanol, C2H5OH, is 277.o kJ/mol at 298.15K. Calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2 and H2O.
At 1000 K, a sample of pure NO2 gas decomposes. 2 NO2(g) ->2 NO(g) + O2(g) The equilibrium constant KP is 158. Analysis shows that the partial pressure of O2 is 0.44 atm at equilibrium. Calculate the pressure of NO and NO2 in the mixture.
Calculate the pH at the equivalence point in a titration between 10.00 mL of acetic acid(0.100 mol/L) and sodium hydroxide (0.100 mol/L).
methane and hydrogen sulfide form when 36g H2 reacts with carbon disufide. Calculate the percent yield if the actual yield of CH4 is 69.8
How many molecules of carbon dioxide are produced when 130 molecules of acetylene (HCCH) to react in excess oxygen produce carbon dioxide and water.
How to Name and Define Acids, How can you know that HNO3 is nitric acid and HNO2 is nitrous acid? How do you know the difference in endings?
DNA Coiling and Topoisomerase, draw a circular DNA molecule that contains 3 negative supercoils. In this DNA molecule, make L = 250 and T = 253. Don't draw the details here i.e., all 250 of the strand passages around each other.
A 35.0ml sample gas is enclosed is in a gas tight syringe at 22 degress celcius. If the syringe is immersed in an ice bath a 0 degress celcius, what is the new gas volume.
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