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An iron bar of mass 965 g cools from 94°C to 5°C. Calculate the heat released (in kilojoules) by metal.
if the ethyl alcohol at 35 degree rise through 8.36 cm in a capillary tube of radius 0.20 mm , What is surface tension
Using the molecular orbital model, write electron configuration for the following diatomic species and calculate the bond orders. Which ones are paramagnetic
Complexometric titration and stoichiometry - How many grams of chloride ion were present in sample
Concentration Units Conversions, Lethal concentration (50 percent kill): 2,485 mg/m3/4 hour... this is for a rat
The Henry's Law Constant for O2 in water at 20 C is 1.28x10-3mol/(L atm). How many grams of O2 will dissolve in 2.0L of H2O that is in contact with air where partial pressure of O2 is 0.209atm?
The solubility product of PbBr2 is 8.9x10^-6. Determine the molar solubility in the following. (a) pure water (b) 0.20 M KBr solution (c) 0.15 M Pb(NO3)2 solution
How many liters of water vapor can be produced if 13.3 liters of methane gas (CH4) are combusted, if all measurements are taken at the same temperature and pressure?
How many liters of oxygen collected over H2O and measured at 27 degrees Celsius and 745.0 mm Hg can be prepared by decomposing 4.421 grams of gold (III) oxide? The vapor pressure of H2O at 27 degrees Celsius is 26.7 mm Hg.
For the equilibrium H2+CO2-> Kc= 3.18 at 1106K. If each of the 4 species was initially present at a concentration of 3.000M.
If the activation energy for a given compound is found to be 42.0 kJ/mol, with a frequency factor of 8.0 × 1010 s-1, what is the rate constant for this reaction at 298 K?
calculate the sodium ion concentration in a solution formed by diluting 35.00 mL of a .585 M sodium phosphate solution to a final volume of 145.00 mL
A 4.70 g nugget of pure gold absorbed 285 J of heat. The initial temperature was 24.0°C. What was the final temperature.
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