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1. We have a solution of unknown substance dissolved in water at the temperature of 300 kelvin , this solution gives rise to osmotic pressure of 2.25 atm then calculate what will be the molality of the solution?
2. We have noted that water level rises to 62.4mL when a piece of metal of 48 grams is dropped into 50.0mL of H2O in a graduated cylinder. Determine the density of this metal?
what would you expect to observe if KHCO3 reacted with H2SO4? what test would you perform to identify the product?
What is the pH of 10 drops of triethylamine in a dropperful of demineralized water? How does the reaction between triethylamine and water explain the measurement of the pH?
Determine the % relative error for the following quantities: if there is no uncertainty given for a specific value, assume an absolute error of "1" in the last digit.
the properties of pure water that had been boiled and condensed and the properties of pure water that has been frozen and then melted? Explain please.
the hydrogen atom relaxes to a lower energy level, emitting light of 397 nm. What is the value of n for the level to which the electron relaxed.
Sulfuric acid is a very strong inorganic used in commercial and non-commercial laboratories. What is the molarity of a 70.00 wt % solution of sulfuric acid in water? The density of the solution is 1.6503 g/mL.
The half-life of carbon-14 is 5730 years. Therefore, 5730 years after being cut from a tree, a piece of wood will have 50.0 % of the carbon-14 that it had originally. What percentage of the original carbon-14 will remain in the wood after another 5..
A 363 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 636 mmHg. Calculate the moles of Ar present.
How much of a 10mM protein solution would you need to prepare 3 mL of a 3mM protein solution. What size micropipette would you use to measure the volume of protein calculated in part a
A mutation in human ATPase 6 (which corresponds to E. coli subunit a) from leucine to arginine at position 156 may allow the movement of protons across the membrane, but not the rotation of the ring of c subunits.
Benzene has a boiling point of 80.1 degrees celcius and a molal boiling point elevation constant of 2.53 degrees celcius/m. Calculate the boiling point of a solution containing 15.0 g of the non-electrolyte C6H4Br2 in 125 ml of benzene (sp gravity..
How much of a 15.0M HNO3 solution should you use to make 850.0mL of a 0.300M HNO3 solution
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