Barrons SAT Subject Test Chemistry, 13th Edition

(T, T, CE) There are as many electrons as there are protons in a neutral atom, and the atomic number represents the number of p ...

(F, T) The first two principal energy levels fill up at 2 and 8 electrons, respectively. That leaves 7 electrons to fill the 3s ...

(D) The solidification of vegetable oil is merely a physical change, like the formation of ice from liquid water at lower tempe ...

(C) Water is formed because most common fuels contain hydrogen in their structures. ...

(E) The other choices, in order, represent 1, or deci-, or centi-, and 100 or hecto-. ...

(E) One mole of any substance contains 6.02 × 10^23 molecules. Since each water molecule is triatomic, there would be 3(6.02 × ...

(E) The noble gases are all monatomic because of their complete outer energy levels. A rule to help you remember diatomic gases ...

(D) By both the VSEPR (Valence Shell Electron Pair Repulsion) method and the orbital structure method, the PCl 3 molecule is tr ...

(C) The complete loss and gain of electrons is an ionic bond. All other bonds indicated are “sharing of electrons” type bonds o ...

(D) The cathode reaction releases only H 2 gas. This half-reaction is as given in (D). ...

(E) The beta particle is a high-speed electron and has the smallest mass of the first four choices. However, gamma rays are ele ...

(D) If 25% of the sample now remains, then 100 years ago 50% would be present. If you go back another 100 years, the sample wou ...

(D) pH = −log[H 3 O+] = −log[1 × 10−4] = −(−4) = 4. ...

(C) Only I and II are true. Distilled water does not significantly conduct an electric current. The polarity of the water molec ...

(A) SO 2 is the acid anhydride of H 2 SO 3 or sulfurous acid. H 2 O + SO 2 → H 2 SO 3. ...

(E) Four grams of hydrogen gas at STP represent 2 mol of hydrogen since 2 g is the gram-molecular mass of hydrogen. Each mole o ...

(B) To solve percent composition problems, first, using estimation, divide the % given by the atomic mass: The empirical formu ...

(E) Because the temperature (in kelvins) increases from 303 K to 333 K, the volume of the gas should increase with pressure hel ...

(A) Paradichlorobenzene, a nonpolar solid, is the only substance that will appreciably dissolve in benzene. Therefore, it will ...

(B) The pH is −log[H+]. A 0.005 molar solution of H 2 SO 4 ionizes in a dilute solution to release two H+ ions per molecule of ...