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A sample of chemical X is found to contain 5.0 grams of oxygen 10.0 grams of carbon, and 20.0 grams of nitrogen. The law of definite proportion would predict that a 78 gram sample of chemical X must contain how many grams of carbon?
What is the simplest explanation of why the 45kD and the 90kD proteins copurified the column. What would be an alternative explanation
What type of orgainc compound is responsible for the fruity flavorings found in many natural substances
Explain how would expect the nonbonding electron-pair domain in NH3 to be greater or less in size than for the corresponding one in PH3
A 250g sample of gaseous Cl2O7 is placed in a 4.00L flask at 25 degrees C and begins to decompose. When equilibrium is established, the pressure of oxygen is 6500 mm. Calculate the total pressure in the flask at equilibrium and the Kp value.
Given a barometric pressure of 756.0{rm mmHg} , calculate the pressure of gas sample (a) as indicated by the manometer
A solution is .450M in HNO3 and 1.3M in Ba(NO3)2. what is the concentrations of No3 in the solution?
The active site of an enzyme can perturb the pKas of amino acid side chains such that they are raised or lowered from what we would expect given the pKa values of the free amino acids.
Vibrations: A certain diatomic molecule vibrates with a characteristic frequency v= 2.45x10^9s^-1 (these are microwaves). Calculate the relative population of the ground state and first excited state at 1K.
how many mols of o2 are produced by the reaction of 156g of co2 with an excess of ko2
Consider the combustion of liquid ethanol. a) Write the complete balanced chemical equation for the reaction, including state subscripts. b) Calculate the change in enthalpy per mole of ethanol.
In a reaction mixture at equilibrium, the partial pressure of NO is 119 torr and that of Br2 is 175 torr. What is the partial pressure of NOBr in this mixture? Kp=28.4 at 298 K.
gives a straight line with a slope equal to -5100 K. What is the activation energy for the reaction?
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