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Formic acid (HCOOH) is secreted by ants. Calculate [H3O+] for a 7.40E-3 M aqueous solution of formic acid (Ka = 1.80E-4).
hydrogen peoxide decays into water and oxygen in a first-order process at 20 degrees celcius. H2O2 yeilds H2O and 1/2 O2 the rate expression is 1.77X10 -5 [H2O2] what is the half life in hours of h2o2.
Determine the volume of SO2 (at STP) formed from the reaction of 96.7g of FeS2 and 55.0 L of O2 (at 398K and 1.20 atm). The molar mass of FeS2 is 119.99 g/mol.
Propose a structure for an amine of formula C4H9N, which liberates a gas when treated with NaNO2 and HCl. The 13C NMR spectrum is as follows, with attached protons in parentheses
What is the percent purity of NaHCO3 in your baking soda? (The formula weight of NaHCO3 is 84.007 g/mole).
If a reaction mixture initially contains 443 of and 391 of , what is the mole fraction of when equilibrium is reached.
Show that the proton condition for a NH4Cl solution is a linear combination of the mass balance equations and the charge balance equation.
Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 21 degrees Celcius.
a sample of h20 with a mass of 46.0 grams has a temperature of -58.0 celcius. how many joules of energy are necessary
the dichloromethane layer is now 31 mg of benzoic acid. What is the partition Coefficient (Kp) of benzoic acid in dichloromethane/water?
for a helium aton in a one-dimensional box calculate the value of the quantum number of energy level for which the energy is equal to 3/2kt at 25 degrees c for a 1nm long box
At what temperature will He atoms have the same Crms value as N2 molecules at 25 degrees Celsius? Solve this problem without calcularing the value of Crms for N2. Crms is the root mean square speed.
what tempreture must 0.040 moles of water vapor be heated in a 500ml flask before the pressure in the flask becomes 2 atm.
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