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Problem- What does a catalyst do to a reaction in terms of 1 the reaction mechanism 2 the activation energy the rate of the reaction does the catalyst change an endothermic reaction to an exothermic reaction?
Please show the entire work. I am thanking you in advance
Suppose you have a 90.5-gram sample of lead at 187oC. The sample of lead losses 13.5 calories of heat. The specific heat of lead is 0.038 cal/g oC. What is the final temperature of the sample of lead
HBr is an acid. Please write a chemical equation showing how it is an acid according to the Arrhenius definition. The response has to be in the form of a balanced chemical equation with all phases included.
When 10.0 g KOH is dissolved in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 25.18°C to 47.53°C. What is the enthalpy change, in kJ/g of KOH dissolved in the water? Assume that the solution has a specific heat capacity ..
Explain the role of mass and dispersion forces versus the presence of hydrogen bonding? Which seems to play a more significant role
what are some examples of biomolecules that are detected by studying their activities
The element platinum has a solid-state structure in which platinum atoms are arranged in cubic shape that repeats throughout the solid. if the length of an edge of the cube is 392 pm (1 pm= 1 x 10^-12), what is the volume of the cube in meters
A voltaic cell consists of an Al/Al3+ half-cell and a Ag/Ag+ half-cell. Calculate Ecell when [Ag+] = 0.00665 M and [Al3+] = 0.6273 M. You should use the reduction potentials for Al3+ is -1.66 V and for Ag+ is 0.80 V.
show an example of your Ka or Kb calculation for NaC2H3O2 given that the measured pH is 7.20 and the [H+] is 6.3 x 10^-3
Find the new volume of the gas sample - What is the new volume of the gas sample
Suppose the first-order rate constant at 70C for the decomposition of dinitrogenpentoxide is 6.82*10^-3s-1. Formula for reaction is 2 N2O5-----> 4 NO2 + O2
an undergraduate researcher in a biology lab produced a buffer solution by dissolving sodium dihydrogen phosphate (Ka = 6.2 × 10-8) and sodium hydrogen phosphate (Ka = 3.6 × 10-13) together in an aqueous solution. What mole ratio of Na2HPO4/NaH2PO..
Which silver salt will precipitate first? Show calculations to support your answer. What is the concentration of Ag+ when the first precipitate begins to form?
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