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Assume a leveling tank is not available and the water level in the gas buret is higher than the water level in the 800-mL beaker. If the pressure of "wet" hydrogen is assumed to equal atmospheric pressure and the volume is recorded, will the calculated moles of hydrogen gas be too high or too low?
The half-life for a first order reaction at 550 oC is 85 sec. How long it would take for 23% of the reactant to decompose?
What is the concentration of hydrogen ions in a solution containing 0.39 M HOCN(cyanic acid) and 0.726 M (NaOCN) (sodium shiu (ys6479) - Acid Base Buffers - dungan - (00533434) 3 cyanate).
Measurements also show that a certain sample of the unknown compound contains 9.8 mol of oxygen and 3.31 mol of chromium.
If 85.0 mg of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m. ?
How many milliliters of 0.200 M NaOH will be required to titrate 7 mL of 0.479 M H2SO4
A gas occupies a volume of 380. ml at 135 °C? At what temperature will the volume of the gas be equal to 535 ml?
Determine the molar mass of a covalent compound to be about 220gmol-. In another experiment you establish that its empirical formula
Calculate the mass of nitrogen dissolved at room temperature in an 83.0 {rm L} home aquarium. Assume a total pressure of 1.0 {rm atm} and a mole fraction for nitrogen of 0.78.
mass is obtained in the reaction, what mass of S2O3^2- was present initially, assuming the reaction went to completion? the density of the HSO3^- solution is 1.45 g/cm^3
Consider the reaction NO + O3 → NO2 + O2 Which has a rate constant given by k = 1.8×10-12 e-1370/T cm3 molecules-1 s-1 .Use the following standard heats of formation.
What was the temperature change of the metal? C) Calculate the specific heat and the atomic mass of the metal. What is the metal?
The air pollutant NO is produced in automobile engines because of the high-temperature reaction below. If the initial concentrations of N2 and O2 at 1000 K are both 1 M, what are the concentrations of NO, N2, and O2 when the reaction mixture reach..
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