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A solid sample of lithium is added to a volume of cold water, but it does not all dissolve. What will happen to the amount of solid observed in the flask if the temperature of the solution is decreased ? -There would be no change -insufficient information is given -The amount of undissolved solid will increase -The amount of undissolved solid will decrease.
(a) What is the molecular weight of the drug? (b) What is the boiling point of the solution? (c) What is the osmotic pressure of the solution?
Perform titration at least three times to get an average number, standard deviation and 90% confidence interval. Check your answer against the computer. In your discussion explain why your results may differ from actual value.
Explain the rate constant for the first order decomposition of a compound A in the reaction 2A = P is Kr= 3.56 * 10-7 S-1 at 25 C. Explain what is the half life of A. Explain what will be the pressure initially 33.0 kPa at (a) 50 s (b) 20 min afte..
A 45.8 mL sample of a 5.8 M KNO3 solution is diluted to 1.00 L. What volume of the diluted solutions contains 15.0 g of potassium nitrate
Compute the molarity of NaOH from a titration that contained 0.5156 g of KHP as well as 29.35mL of 0.1 M solution of NaOH used.
an aqueous antifreeze solution is 48.5 ethylene glycol c2h6o2 by mass. the density of the solution is 1.062
6NO2+2H2O=4(HNO3)+2NO. For this equation, how many grams of nitrogen dioxide are needed to react with 3.70mol of H2O? How many grams of nitrogen monoxide are produced when 2.18mol of H2O react?
The number of moles and the mass of magnesium carbonate, MgCO3, required to produce 283 g of carbon dioxide. (MgO is the other product.)
Consider a steel containing 0.6% carbon and 10% chromium. Estimate the eutectoid temperature and concentration. What is the proeutectoid phase
A 0.481 gram sample of an unknown acid (HX) required 28.95 mL of 0.2013 M NaOH for neutralization to a phenolphthalein endpoint. What is the molar mass of the acid
The activation energy of a certain reaction is 65.2 kj/molHow many times faster will the reaction occur at 51 degrees C than at 0
The reaction 2A (gas) = B (gas) is second order in A also has a half life of 1 hour. If the preliminary pressure of A is 1atm, explain what are PA and PB at t=1 hour and t = 2 hour
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