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A river contains 10.5 mg/L of dissolved silica. The measured pH = 6.5 and the water temperature is 25 degrees Celcius. Calculate the concentration of each silica species in solution.
A 50.0 L cylinder contains nitrogen gas at a pressure of 21.5 atm. The contents of the cylinder are emptied into an evacuated tank of unknown volume. If the final pressure in the tank is 1.55 atm, then what is the volume of the tank
if the mass of the tablet analyzed from the previous question was 1.247 grams what is the mass effectiveness of the
Calculate the number of moles of Cl atoms in 1.20×1024 formula~units of magnesium chloride, MgCl_2
what is the concetration of acetic acid and sodium acetate.
Calculate the concentration of I - in a solution obtained by shaking 0.20M KI with an excess of AgCl(s)
Isotopes of elements are atoms of the same element that vary in the: 1,number of electrons associated with the nucleus. 2,number of neutrons in the nucleus. 3,number of atoms in a molecule. 4,number of protons in the nucleus.
A 5.0 L sample has a pressure of 5.0 atm. What is the volume of the anesthetic given to a patient at a pressure at a pressure of 1.0 atm?
A 0.50g sample of vegetable oil is placed in a caloriemeter. When the sample is burned 18.9kj are burned off. What is the caloric value in kcal/g of the oil? I am not sure how to set this problem up. Please help
celcius have enough energy to overcome the activation energy barrier for a particular reaction, what is the activation energy for this reaction
an unknown mass of each of the given substances 1.sand tf70.4 c2.pyrex glasstf67.6 c3.watertf55.9 c 4.ethanol tf45.9 c
The inital concentration of HBr in a reaction vessel is 1.2 x 10 ^-3 mol/L. If the vessel is heated to 500 K, WHat is the percent decomposition of HBr and the equilbirum compositions of the mixtures?
how many electrons can occupy subshells with the following values of l: when L =0 and L=3 and when L=5
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