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A rate constant obeys the Arrehnius equation, the factor A being 2.2 * 10^13 s-1 and the activation energy being 150 kj mol -1. What is the rate constant at 227 C, in s-1?
Sodium bicarbonate undergoes thermal decomposition according to 2 NaHCO3(s) Na2CO3(s) + CO2(g) + H2O(g) What happens when 0.20 atm of argon gas is added 1. [CO2] increases 2. [CO2] decreases 3. [CO2] stays the same
What is the hydronium ion concentration of a 0.500 M acetic acid solution with Ka = 1.8 x 10-5? The equation for the dissociation of acetic acid is: CH3CO2H(aq) + H2O(l) H3O+(aq) + CH3CO2-(aq)
a copper wire is strectched with a stress of 10ksi at 20deg C. If the length is held constant, to what temperature must the wire be heated to reduce the stress to 5ksi
a 25.6 g sample of pure iron at 66degc is dropped into 65 g of water at 33degc. what is the final temperature of the
Use bond enthalpies to estimate the enthalpy change for the following gas-phase reaction.
Identify the statements that accurately describe how hydrogen ion concentration relates to energy production in oxidative phosphorylation. ATP synthase provides energy in the form of ATP to actively transport H+ into the mitochondrial matrix.
Select the strongest interparticle force(s) present in Mg3N2.
How many moles of NaOH must be added to 0.550 L of 0.191 mol/L HC3H5O2(aq) to obtain a solution with pH=4.7? Assume the temperature is 25oC. (For HC3H5O2, pKa=4.89 at 25oC).
a sample of zn metal reacts completely with of an excess of hcl. the hydrogen gas produced is collected over water at
Using the Extended DH Equation, we calculate the activity coefficient, of an ion in solution as, -log = [ 0.253 ± 0.008]/ [ 3.50 ± 0.03]. What is the error in. if the principal uncertainties are in the ionic size and the ionic strength
the feed stream to a claus plant consist of 20 mole h2s and 80 mole co2. one-third of the stream is sent to a furnance
You have 50 mL of 0.010 fully protonated histidine. how many milimoles of base must be added to bring histidine solution to pH equivalent to the pI of histidine.
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