during the reaction, how many grams of NO 2 can be produced? (Molar
masses: NO = 30. g/mol, NO 2 = 46. g/mol)
(A) 46.
(B) 60.
(C) 92.
(D) 120
(E) 180
Based on the information shown, each of the following equations represents a
reaction in which the change in entropy, ΔS, is positive EXCEPT
(A) CaCO 3 (s) → CaO(s) + CO 2 (g)
(B) Zn(s) + 2H+(aq) → H 2 (g) + Zn2+(aq)
(C) 2C 2 H 6 (g) + 7O 2 (g) → 4CO 2 (g) + 6H 2 O(g)
(D) NaCl(s) → Na+(aq) + Cl−(aq)
(E) N 2 (g) + 3H 2 (g) → 2NH 3 (g)
Cl 2 (g) + 2Br− (aq) →?
When 1 mole of chlorine gas reacts completely with excess KBr
solution, as shown above, the products obtained are
(A) 1 mol of Cl− ions and 1 mol of Br−
(B) 1 mol of Cl− ions and 2 mol of Br−
(C) 1 mol of Cl− ions and 1 mol of Br 2
(D) 2 mol of Cl− ions and 1 mol of Br 2
(E) 2 mol of Cl− ions and 2 mol of Br 2
Glucose and water are physically combined. Which of the following
statements about the combination is most accurate?
(A) Glucose is a nonpolar solute and will cause the resulting solution to
have a higher freezing point compared to the water by itself.
(B) Glucose is a nonpolar solute and will cause the resulting solution
to have a lower freezing point compared to the water by itself.
(C) Glucose is a polar solute and will cause the resulting solution to
have a higher freezing point compared to the water by itself.
(D) Glucose is a polar solute and will cause the resulting solution to
have a lower freezing point compared to the water by itself.
(E) Glucose and water will not form a solution, and so the freezing
point of the water will remain unchanged.
Which Ka value indicates the strongest acid?