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A certain mass of water was heated with 41,840 Joules, raising its temperature from 22.0 °C to 28.5 °C. Find the mass of the water, in grams. (Cp of H2O = 4.184 J/g °C). How many joules of heat are needed to change 50.0 grams of ice at -15.0 °C to steam at 120.0 °C? (Cp of H2O = 4.184 J/g °C).
The density of helium is .01784g/l at S.T.P. I a given mass of helium at S.T.P is allowed to expand to 1.500 times its inital volume bu changing the temperature and pressure,
Calculate the concentrations of all species in a 0.750 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
what is the mol fraction na2so4 in a solution which is 11.5 by weight na2so4 molar mass na2so4 142.06 gmol and h2o
Choose a more convenient order. (b) Calculate q, w, deltaU, deltaH, and deltaS when the gas changes between the same two conditions
Calculate the percent ionization of 7.4x10^-3 M butanoic acid in a solution containing 7.0x10^-2 M sodium butanoate
Which of the following is the strongest nucleophile in polar protic solvents? Can you please explain why A) (CH3)2P- B) (CH3)2N- C) CH3O- D) CH3S-
molar mass has the units of gramsmole. molar mass serves as a conversion factor between numbers of moles and mass. if
Using the thermochemical data given for NO2 and N2O4 in class, determine the fraction of N2O4 that will dissociate into two NO2 molecules if one mole of pure N2O4 is introduced to a 10 liter constant volume,
Calculate the mass of Cu(NO3)2·3H2O needed to prepare 50.0mL of a 0.50 M Cu(II) solution?
calculate the equilibrium constant keq for the reaction of equimolar amounts of acetophenone and sodium hydroxide to
Write a balanced equation including states of matter for the reaction of Zn(H2O)4 2+ in aqueous NaCN. You can assume sodium is a secator ion and does not need
Among the electrolytes Na2SO4, CaCl2, Al2(SO4)3 and NH4Cl, the most effective coagulating agent for Sb2S3 sol is
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