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(a)What is a catalyst?
(b)What is the difference between a homogeneous and a heterogeneous catalyst?
(c) Do catalysts affect the overall enthalpy change for a reaction, the activation energy, or both?
A 125g metal block at a temperature of 93.2 degrees Celsius was immersed in 100g of water at 18.3 degrees celsius. Given the specific heat of metal (s= 0.900j/g x degrees celsius)
Dibenzalacetone is commonly used in sunscreens. Suggest what properties are valuable in a compound for use as a sunscreen.
Calculate [H+] and the pH of the following solutions
part 1 how much in grams of a 18.4g sample of ccl4 iscarbon?part 2 a sample of a compound has the following
Explain how the acid hydrolysis of starch differs from the enzyme catalyzed hydfolysis. Compare products as well as conditions of time
calculate the molarity of an nh3 solution made up of 37.5 g of nh3 in 70.0 g of water. the density of the solution is
chemical potential that is 1.00 KJ mol lss than an ideal gas under the same conditions. What kind of intermolecular forces dominate the system? what is the fugacity of the gas?
Assuming that a neutron star has the same density as a neutron, calculate the mass (in ) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.12.
Which one of the following is the correct formula resulting from a combination of the common ions from these elements: Li and S
For a steel bar deformation begins at 400MPa, it has a modulus of elasticity of 207GPa. a) What is the maximum load that can be applied to a cylindrical specimen 10mm diameter and 60mm long without plastic deformation? b) What is the maximum length ..
a 1.6192-g sample of neat hydrazine iscarefully dissolved in water and diluted to 1500.0 ml. a 20.00-mlaliquot of this
The Ka value for acetic acid, CH3COOH(aq), is 1.8x10-5. Compute the pH of a 2.80 M acetic acid solution. Compute the ph of the resulting solution when 3.00mL of the 2.80mL of the 2.80 M acetic is diluted to make 250.0mL solution.
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