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The Periodic Table was put together by a Russian Scientist by the name Dmitri Mendeleev in the 1800s. How did Dmitri accomplish this and what is so important about what he did?
In acidic aqueous solution, water can be reduced to H2 gas, but the H+ ions can be reduced more easity. What is the voltage of the hydrogen ion reduction half-reaction, under standard conditions
What is the difference between a monoprotic acid and a diprotic acid, and a weak acid and a strong acid,
Determine the pH at the equivalence (stoichiometric) point in the titration of 31.4 mL of 0.899 M HF by 0.886 M NaOH. The Ka of HF is 3.5 x 10^-4.
A canister is filled with 310 of ice and 100. of liquid water, both at 0 . The canister is placed in an oven until all the has boiled off and the canister is empty. How much energy in calories was absorbed?
Now that you understand the idea of nuclear binding energy, explain why the larger atoms need an excess of neutrons compared to protons.
calculate the molecular mass of the nonionic sloutes. 6403 grams of solute in 3.90 x 10^2 grams of water raises the boiling point to 100.680 c.
What type(s) of intermolecular forces is(are) expected between HCOOCH2CH2CH3 molecules?
Write a brief qualitative description of the following reactions: 1.) Fe(NO3)3 + Na2SO4: ? 2.) Fe(NO3)3/Na2SO4 + NaC2H3O2: ? 3.) Ba(N03)2 + KSCN: ?
Two liquids, A and B, show partial miscibility below 52.4 C. The critical concentration at the upper critical temperature is x=0.459, where x is the mole fraction of A. At 40.0 C the two solutions in the equilibrium have x=0.22 and x=0.60, respect..
Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of NO2(g).
A certain mass of gas in a 9.7 L container has a pressure of 157 kPa. When the volume is reduced to 4.5 L with no change in temperature, what is the new pressure of the gas?
a solution of 62.4 g of insulin in enough water to make 1.000 l of solution has an osmotic pressure of 0.305 atm at
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