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Melting point of a mixture A + B was measured to be higher than any of the melting points of pure individual components A and B. When this might be the case? (A possibility of an experimental error was excluded)?
Which possesses more energy a photon with a wavelength of 528 nm or a photon with a frequency
Acid-catalyzed dehydration of cyclobutylmethanol proceeds via an E1 mechanism and gives two alkenes
a flask contains a mixture of neg and arg. there are 0.250 mol of neg which exerts a pressure of 205 mmhg. if the arg
A11.6 g sample of a certain gas was introduced into a constant volume container at 25 °C. if the container were heated to 175 °C, how many grams of gas must be vented from the container to keep the pressure of the gas constant
At equilibrium a 2L vessel contains .410 mol of H2, .130mol of Br2, and 36.0 mol of HBr. What is the equilibrium constant for the reaction at this temperature?
When the following chemical equation is correctly balanced, what is the sum of the smallest set of integer coefficients
If the molar enthalpy of combustion of ethane is -1.56 MJ/mol, how much heat is produced in the burning of;
Instead of using two 100ml portions of ether. a single extraction had been carried out using one 200 mL portion of ether. What weight of Z would be contained in the ether solution under these conditions
State what are the most common agents in polymer degradation
the electron microscope has been widely used to obtain highly magnified images of biological and other types of
Write the chemical equation for the dissociation of the salt into its ions. Write the expression for Ka or Kb and give the value of Ka or Kb 1. 1.0M NaC2H3O2 pH=7.45 2. 1.0M NaHCO3 pH=8.60 3. 1.0M Na2CO3 pH=11.62 4. 1.0m NH4Cl pH=3.98
German physicist Werner Heisenberg related the uncertainty of an object's position (?x) to the uncertainty in its velocity ?v. The mass of an electron is 9.11× 10-31 kg. What is the uncertainty in the position of an electron moving at 3.00 × 10^6 ..
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