Barrons SAT Subject Test Chemistry, 13th Edition

(B) If the solution is to be 5% sodium hydroxide, then 5% of 100 g is 5 g. Percent is always by mass unless otherwise specified ...

(C) Because this equation is exothermic, higher temperatures will decrease the reaction to the right and increase the reaction ...

(B) The reaction is: Since molarity × volume (L) = moles, then ...

(E) The reaction is: The gram-molecular mass of calcium carbonate is 100 g. Then 150 g = or 1.5 mol of calcium carbonate. Acco ...

(E) The other choices are wrong because: (A) is less dense than air and will escape through hole in stopper (B) reacts with ai ...

(B) The Mg needs oxygen to form MgO so the lid cannot be tightly sealed. Oxygen is needed for the Mg to oxidize to MgO. All oth ...

(C) A desiccator is a device used to keep things dry. After the hydrated BaCl 2 has had the water removed, the desiccator keeps ...

(C) If material jumped out of the evaporating dish while heating, barium chloride and water would both be removed. The purpose ...

(D) As a result of the complete heating, 1.80 grams of water is removed from the hydrate. The mass of water released from the b ...

(D) 1K = 39, 1Al = 27, 2(SO 4 ) = 2(32 + 16 × 4) = 192, and 12H 2 O = 12(2 + 16) = 216. This totals 474 g. ...

52. (D) Or, using the mole method: 44.8 L = 2 mol This shows that: Since molar mass of Al = 27 g/mol ...

(B) Metal oxides are generally basic anhydrides. ...

(A) Both of the reactions shown are single replacement reactions. Single replacement reactions are also redox processes in whic ...

(C) Tin replaces copper in reaction #2 and is therefore more active than copper. Zinc replaces tin in reaction #1, however, and ...

(A) Zinc is being oxidized (from 0 to +2) by the tin(II) chloride in the first reaction. Therefore, tin(II) chloride is the oxi ...

57. (D) Equation shows 2 mol → 3 mol O 2 3 mol × 22.4 L/mol = 67.2 L ...

(C) The balanced equation has the coefficients 2, 3, 1, and 6: 2Al(OH) 3 + 3H 2 SO 4 → Al 2 (SO 4 ) 3 + 6H 2 O. ...

(E) The reaction is NaClO 3 (s) → NaCl(s) + O 2 (g). ...

(D) II and III are identical; isotopes differ only in the number of neutrons in the nucleus and this affects the atomic mass on ...

(E) I, II, and III will increase the rate of this reaction. Each of them causes the rate of this reaction to increase. ...