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a solution is prepared by dissolving 20.0 g of NaI in enoug water to make 300 mL of solution How many moles of ions are in 25.0 mL of the solution?
calculate the molarity of a solution prepared by diluting 1.20 x 10^2 ml of 2.725 solution to 125.0 ml
in the reaction P4+5O2->2P2O5, how many moles of oxygen are consumed each time 0.500 mole of P2O5 is formed?
a mixture of methane and ethane is stored in a container at 294 mmHg. The gases are burned in air to form co2 and h2o. if the pressure of co2 is 357 mmhg measured at the same temperature and volume as the original mixture, calculate the mole fract..
calculate the amount of work produced on the system and by applying the first law of thermodynamic calculate the amount of q of heat transfered from the system to the enviroment,
What is the dissolution reaction for each of the ionic solids below. Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.
Calculate the amount of solute in g needed to prepare 431.5 g of 8.85 %(m/m) LiNO3 solution.
A beaker with 185 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.70 mL of a 0.440 M HCl solution to the beaker.
The compound KB5O8·X H2O was analyzed and found to contain 24.6% of water. If the formula weight of this compound is 293.15 g/mol, what is the number of water molecules (X) in the formula?
If 3.67 g of CO2 (MW = 44 g/mol) gas is introduced into an evacuated 3.58 L flask at 65 deg. C, what is the pressure inside the flask?
The product of the complete hydrolysis contained 1.8 mg of the compound shown below, and no other 2,4-dinitrophenyl derivatives of the ?-amino groups of other amino acids could be found How many polypeptide chains are in this protein?
For each of the following reactions, balance reaction, determine the number of electrons transferred in the reaction, and write the equilibrium constant
Suppose that, during an extraction, you lost track of which flask contained the aqueous layer. What could you do to determine which layer is which
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