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Explain a sample 80 mL solution of hydrochloric acid (HCl) is titrated with 0.25 M NaOH. The volume of base necessary to reach the equivalence point is measured to be 23.467 mL. Explain what was the original concentration of the acid?
When 33.5 mL of 0.580 M H2SO4 is added to 33.5 mL of 1.16 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ?H of this reaction.
a sample of hydrogen gas initially at 29C and 7.0 L iscooled until its final volume is 2.9 L. What is its final temperature
What is the volume (L) of a sample of gas when 4.50 grams of H20(g) and 35.0g of Xe(g) at 650mmHg are mixed at 200 degrees celsius
a sample of sodium reacts completely with 0.142 kg of chlorine forming 234 g of sodium chloride. what mass of sodium
what differences in product distribution would be expected for the elimination reactions of 2-bromo-2-methylbutane and 2-bromo-2,3-methylbutane wit hexcess potassium hydroxide in ethanol?
completely neutralizes stomach acid (HCl, .10M) How much carbon dioxide is made at STP (37 C, 767 torr, 100% humidity) by ingesting one 1.834 gram tablet
Consider the following species: Ca, Br1-, Fe2+ , Cu+, Co3+. Li+. List the oxidizing agents. List the reducing agents. (Some could be both.) Which is the best oxidizing agent
What is the value of the equilibrium constant for the neutralization of acetic acid with sodium hydroxide? The Ka for acetic acid is 1.8 ? 10-5 and the neutralization reaction of interest is CH3CO2H(aq) + NaOH(aq) -> H2O(l) + NaCH3CO2(aq).
total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 149 g of solution. The reaction
In thin layer chromatography (TLC) what does the Rf (retention factor) value represent. What is a large Rf value telling us. Can an Rf value be too small or large. What advantages and disadvantages does TLC have
The calorimeter and water have a combined heat capacity of 43.50 kJ/K. Calculate the heat of formation of ammonia in kJ/mol
Nitrogen dioxide (NO2) cannot be obtained in a pure form in the gas phase because it exists as a mixture of NO2 and N2O4. At 25°C and 0.98 atm, the density of this gas mixture is 2.7 g/L.
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