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Consider a nitrite (NO2-) analysis for rainwater samples. Gas chromatographic (GC) vs. spectrophometric approaches were compared with the following results as means ? standard deviation. Do these methods agree with each other at the 95% confidence level? Be sure to show all calculations and all assumptions. Rainwater: 0.069 ? 0.005 mg/L (n=7) (GC) 0.063 ? 0.008 mg/L (n=5) (spectrophotometric)
Some observations through an experiment shows that a gas sample of 115 mili litres has a mass of 0.170 grams at a pressure of 711mmHg and a temperature of 34 degree celsius. Determine the molar mass of the gas.
Compute the enthalpy change, , for this reaction per mole of (Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] )
How many grams of sodium phosphate Na3PO4(163.9 g/mol) are contained in 205. mL of a sodium phosphate solution that is 0.194 M in sodium ion Na+?
Using the reaction 2C6H6+15O2--->12CO2+6H2O, what volume of carbon dioxide will be produced when 128.0 grams of benzene react.
The volume of a gas sample is 650. mL at STP. What volume will the sample occupy at 25.0°C and 950. torr pressure.
calculate the energy (in kJ) of a photon which has a wavelength of a mircowave with a wavelength of 2.84 cm
Electron Donor and Receptor in Metal Complexes, In the first step of the catalytic cycle, the alkene bonds to palladium to make a new metal complex The alkene is now a ligand because the pi-bond of the alkene is donating some of its electrons to p..
A truck driver used sand to soak up a 1 g spill of lindane (C6H6Cl6). He placed the contaminated soil in an open drum which then filled with 150 L of water during a rainstorm.
Determine the molality of a solution prepared by dissolving 0.500 moles of CaF2 in 11.5 moles H2O.
How many grams of CaH2 are needed to generate 19.0 L of H2 gas if the pressure of H2 is 780. torr at 15 C?
Anton Von L. a 17th century pioneer in the use of the microscope, described the microrganisms he saw as "animalcules" whose length was "25 thousandths of an inch."
how many N2 molecules can be produced after the explosion of 2.37 kg of NH4NO3? (Molar mass of NH4NO3 is 80.06 g/mol.)
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