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Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is radioactive, with a half-life of 28.1 yr. Calculate how long it will take for 0.860 g of the isotope to be reduced to 0.170 g by decay
Explain why alcohols such as ethanol and propanol are soluble in water, butanol is moderately soluble and pentanol is slightly soluble
34.62 mL sample of .1510 molar NaOH was needed to completely neutralize 50 mL of an H2SO4 solution. what is the concentration of the origional sulfuric acid solution?
In the first step of the trypsin mechanism, the side-chain oxygen of Ser 195 attacks the carbonyl carbon of the substrate. Use PyMOL and your model of the enzyme substrate complex to determine the distance between these two atoms.
Assume the total heat capacity of the air C air=30 J/K. Describe what's the likely ice will ne after the system reaches equilibrium. b) Estimate theliekly final temperature after reaching equilibrium
Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of Hydrogen gas are formed when 48.7g of sodium are added to water?
what volume of nitrogen gas is needed to react completely with 150.0 L of hydrogen in the production of ammonia.
What is the concentration of each species present when equilibrium is reached? b. What is the value of Kc for this reaction at 500K?
what products may have been formed during the combustion of the gas?
Identify the limiting reagent and the volume of CO2 formed when 11L CS2 reacts with 18L O2 to produce CO2 gas and SO2 gas at STP.
A buffered solution is made by adding 50.9 g NH4Cl to 1.00 L of a 0.75 M solution of NH3. Calculate the pH of the final solution. (Assume no volume change.)
what is the pH of a solution of 125ml of 3.5 M of CH3COOH and 25ml of 1.25 M of NaOH ?
.799 g sample of an unknown substance has dissolved in 15.6 g of benzene. The freezing point of the solution was 4.075 C. The freezing point of pure benzene is 5.455 C. For benzene, Kf= 5.065 C/m, and Kb=2.61 C/m. Assume that the solute is a nonel..
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