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A compound is composed of elements C, H, and N. A 11.550-mg sample of the unknown compound was combusted, producing 31.332 mg of CO2 and 8.983 mg of H2O. What is the empirical formula for this compound
How many grams of hydrogen chloride can be produced from 350 grams of sodium chloride and 290 grams of hyroden sulfate if the reaction has a yield of 88%?
Calculate molarity of solution obtained by dissolving 0.212g of Na2CO3 in 250cm3 of solution?
What are the mole fractions of ethanol and water in a solution prepared by mixing 55 mL of ethanol with 45 mL of water at 25 degrees celsius
Calculate the pressure when the volume is 1.22 L and the temperature is 307 K.
A copper wire (density = 8.96 g/cm3) has a diameter of 0.49 mm. If a sample of this copper wire has a mass of 11 g, how long is the wire in ft?
How many grams of ethylene glycol would be needed to prevent 4kg of water from freezing above -5.0 degress C
What biochemical changes are required to convert tyrosine to (a) norepinephrine and (b) epinephrine? and 3- Some bacterial signaling systems involve kinases that transfer a phosphoryl group to a His side chain. Draw the phospho-His side chain.
A 91 gram solution of silver nitrate contains 8 grams of AgNO3. What is the percent by mass of silver nitrate in this solution.
Suppose the radius of an atom in a simple cubic unit cell is 0.27 nm. What is the edge length of the unit cell in nm.
what are the relative energies of the orbitals defined by n=4? if this atom is placed in a magnetic field, how would the relative energies of these orbitals change and why
in the reaction P4+5O2->2P2O5, how many moles of oxygen are consumed each time 0.500 mole of P2O5 is formed?
At a certain temperature and pressure 2.1 L of H2 reacts with 2.1 L of I2. If all the H2 and I2 are consumed, what volume of HI, at the same temperature and pressure, will be produced?
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