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In lab, a student was given a hydrated version of NiCl2 as the unknown. The initial mass of the hydrated salt was 0.894 g. The student heated the crucible for 10 minutes with the cover slightly ajar. After cooling, the dried salt weighed 0.487 g. Based on these results, answer the following questions.
The chemical formula for this hydrate is: NiCl2 x ____ H2O.
The IUPAC name for this hydrate is:
A 100. mL sample of 0.200 M aqueous hydrochloric acid is added to 100. mL of 0.200 M aqueous ammonia in a calorimeter whose heat capacity (excluding any water) is 480. J/K. The following reaction occurs when the two solutions are mixed.
At a particular temperature the equilibrium constant for the reaction: H2(g) + F2(g) ? 2HF(g) is K = 36.0. A reaction mixture in a 10.00-L flask contains 0.42 moles each of hydrogen and fluorine gases plus 0.15 moles of HF.
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The specific heat of copper is 0.092 cal/g oC. Show that the amount of heat needed to raise the temperature of a 10 gram piece of copper from 0oC to 100oC is 92 calories.
The Heat of vaporization delta Hvap of carbon tetrachloride (CCl4) at 25C is 39.4 kJ/mol. If 1 mol of liquid carbon tetrachloride at 25C has an entropy of 216 J/K, what is the entropy of 1 mol of the vapor in equilibrium with the liquid at this te..
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