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Give an example of a biological reaction in which water participates as a reactant and a reaction in which it participates as a product.
Write a stepwise mechanism using arrows to show movement of electrons for the reaction of 1-butyne with hydrogen bromide to produce 2,2-dibromobutane. CH3CH2CCH + 2HBr --------->CH3CH2CBr2CH3
Describe the preparation of a 1.50 M, pH 8.0 tris buffer (500 mL) using tris base (MW= 121.1 g/mol) and 3.0 M HCl. pKa of tris is 8.3
Calculate the change in internal energy if a) The specific heat is assumed constant at its room-temperature value.
Chlorine was previously identified as a catalyst in the breakdown of ozone into oxygen gas. Using the enthalpy of reaction for two reactions with ozone, determine the enthalpy of reaction for the reaction of chlorine with ozone.
Derive the expression for the energy of a molecule, Consider the system of a gas adsorbed onto a surface. The gas can be treated as a two-dimensional ideal gas
the volume of a gas is 93 mL when the temperature is 91C. If the temperature is reduced to 5C without changing the pressure, what is the new volume of the gas?
What is the structure of the product of Diels-Alder reaction of (E,E)-2,4-hexadien-1-ol with maleic anhydride?
If the total pressure is 1.8 atm, what is the partial pressure of ethanol?
When the temperature is 100 °C, find the mole fraction of benzene in the vapor and liquid phases and the ratio of total moles in vapor to total moles in liquid.
When 1.00 g of urea (CO(NH2)2) is dissolved in 200g of solvent A, the freezing point is lowered by 0.250C. When 1.50 g of the nonelectrolyte Y is dissolved in 125 g of the same solvent
The half life of polonium-210 is 138.4 days. How many milligrams of polonium-210 remain after 415.2 days if you start with 2.0 mg of the isotope?
What is the molarity of ZnCl2 that forms when 30.0 of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL . Zn+ CuCl2=ZnCl2+Cu.
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