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Problem- Water from a lake in an area with limestone bedrock has a chemical composition as follows- Calcium 95 mg L-1, Magnesium 12mg L-1, Sodium 17mg L-1, Potassium 4 mg L-1, Hydrogen carbonate (asHCO3-) 338 mg L-1, Sulphate (as SO4-2)7 mg L-1,Chloride 12mg L-1, Fluoride 0.2 mg L-1, Nitrate (as NO-3) 3mg L-1. pH is 6.8. If the organic matter (HM) content of the water is 12 mg L-1, Illustrate that charge balance is adequately maintained.
Provide your answer in scientific notation
A sample of water in the vapor phase (no liquid present) in a flask of constant volume exerts a pressure of 429 mm Hg at 97 °C. The flask is slowly cooled
calculate the energy of a photon of light with a wavelength of 360nm.
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consider the following thermochemical equation caco3s caos co2 ho 178 kj. how much heat must be absorbed by 22.5 g of
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You prepared a 0.250 M solution by diluting 8.45(+-0.04)mL of 28.0(+-0.5)mL wt.%NH3 (density=0.899(+-0.003)g/mL up to 500.0(+-0.2)mL. Find the uncertainty in 0.250 M.
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a graduated cylinder reads 4 ml of water.then a shell is dropped into it and the water level rises to 12 ml.what is the volume of the shell?
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