Zadanie 1d
A sample of 0.0120 mol of NO2 was sealed in a vessel of volume 1.00 dm3 and kept at 10.0 °C until equilibrium was established. At equilibrium, the vessel contained 0.00860 mol of NO2 and 0.00170 mol of N2O4.…
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A sample of 0.0120 mol of NO2 was sealed in a vessel of volume 1.00 dm3 and kept at 10.0 °C until equilibrium was established. At equilibrium, the vessel contained 0.00860 mol of NO2 and 0.00170 mol of N2O4.…
The amount of NO2 prepared was checked by titration. The gas was first absorbed in water: 2 NO2(g) + H2O(l) → HNO3(aq) + HNO2(aq) The resulting solution was made up to 200.0 cm3 in a volumetric flask, and 20.0 cm3 portions…
Determine the molecular formula and the empirical formula of cresolphthalein.
Cresolphthalein is manufactured from 2-methylphenol, CH3C6H4OH. State an equation that shows 2-methylphenol acting as a Brønsted–Lowry acid.
The letters below stand for four species, not for element symbols. Which pair of species has an identical number of outer-shell electrons? , , , A. J and M B. L and Q C.…
Suggest a sequence of experimental steps that would give a pure sample of each of the three components.
The student recorded the following masses. Calculate the percentage by mass of iron and of calcium carbonate in the mixture.
The three percentages in 2b add up to more than 100 %. Suggest an error that would explain this result and how it could be reduced or eliminated.
The results did not support the student's hypothesis. Suggest what the student overlooked when forming the hypothesis.
Deduce the electron configuration of the Fe3+ ion.