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Complete the table for aqueous solutions of caffeine C8H10O2N4. a. given: mole fraction solven:0.900 find molality, mass percent solvent, Ppm solute b. given: Ppm solute:1269 find molality, mass percent solvent, mole fraction solvent c. given: molality:0.2560 find mass percent solvent, Ppm solute, mole fraction solvent
A gas made up of atoms escapes through a pinhole times as fast as gas. Write the chemical formula of the gas.
The following reaction is first order with respect to NO and first order with respect to O2, and the rate constant is 5.0 x 104 M-1s-1
A lab rat weighs 265 grams and absorbs 1.67*10^13 beta particles eash with an energy of 2.2*10^13u. If relative biological effectiveness is .75 what is the dose. a)1.04*10^-2 sV b)1.3*10^-2 sV c)1.04*10^-5 sV d) 1.39*10^-5 sV e)6.23*10^-13 sV
Molecules are mobile in a gas and some reactions can be run in the gas phase. Give several reasons solutions are preferable for synthetic reactions.
Grignard reagents (RMgX) are extremely strong bases and nucleophiles. Comlete the following reactions which demonstrate these two properties.
What is the pH during the titration of 25.00mL of 0.10M HAc(aq) using .10M NaOH(aq) as the titrant, after the addition of 10.0, 25.0, and 30.0ml of titrant.
Draw the chemical structure of an aldohexopyranose and a ketohexofuranose.
Which of the following is a statement of Hess's Law? Answer a. If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the sum of the enthalpy changes for the individual steps
If you built a standard galvanic cell using the following half-reactions, what is the maximum work that could be done by this standard cell? (deltaG=wmax)
What is dry THF. And can we use it as a general solvent in synthesis of ionic reactions of alkyl halides.
What mass of water would need to evaporate from your skin in order to dissipate 1.7 × 105 J of heat from your body? H2O(l) → H2O(g) ΔHvap = 40.7 kJ/mol
2NaN3 (s) --> 2Na (s) + 3N2 (g), Calculate the volume of N2 generated at 80.0 C and 823 mmHg by the decomposition of 60.0 g of NaN3
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