21. The \(\Delta\text{H}\) value for the reaction (1/2)O2(g) + Hg(l) \(\rightarrow\) HgO(s) is -90.8kJ. How much heat is released when 32.5 g Hg is reacted with oxygen? (A)9.32 kJ (B)90.8 kJ (C)14.7 kJ (D)40.0 kJ (E)none of these

7. Which of the following solutions contains the greatest total ion concentration? (A)One mole of potassium chloride dissolved in 1.0 L of solution. (B)One mole of iron(II) nitrate dissolved in 1.0 L of solution. (C)One mole of potassium hydroxide dissolved in 1.0 L of solution. (D)One mole of sodium phosphate dissolved in 1.0 L of solution. (E)At least two of the above solutions have an equal number of ions, and these contain the greatest total ion concentration.

21. The \(\Delta\text{H}\) value for the reaction (1/2)O₂(g) + Hg(l) \(\rightarrow\) HgO(s) is -90.8kJ. How much heat is released when 32.5 g Hg is reacted with oxygen?
(A)9.32 kJ
(B)90.8 kJ
(C)14.7 kJ
(D)40.0 kJ
(E)none of these

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