(A) 1.3 × 10−2
(B) 6.7 × 10−5
(C) 5.7 × 10−10
(D) 4.4 × 10−7
(E) 1.8 × 10−16
- What mass of CaCO 3 is needed to produce 11.2 liters of CO 2 at STP when
the calcium carbonate is reacted with an excess amount of hydrochloric acid?
(Molar masses:
CaCO 3 = 100. g/mol, HCl = 36.5 g/mol,
CO 2 = 44.0 g/mol)
(A) 25.0 g
(B) 44.0 g
(C) 50.0 g
(D) 100. g
(E) None of the above
- By experimentation it is found that a saturated solution of BaSO 4 at 25°C
contains 4.0 × 10−5 mole/liter of Ba2+ ions. What is the Ksp of the BaSO 4?
(A) 1.6 × 10−4
(B) 1.6 × 10−9
(C) 1.6 × 10−10
(D) 4.0 × 10−10
(E) 40 × 10−9
- What is the ΔH^0 value for the decomposition of sodium chlorate, given the
following information?
(ΔH^0 f values: NaClO 3 (s) = −358 J/mol, NaCl(s) = −410 J/mol, O 2 (g) =
0 kcal/mol)
(A) 52 J
(B) −52 J
(C) 768 J
(D) −768 J
(E)
- To the equilibrium reaction shown below:
