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Questions in chemistry

📝 Answered - Equal amounts of ethanol and water are mixed at room temperature and at 101.3 kPa. Which process is used to separate ethanol from the mixture? A. distillation B. reduction C. filtration D. ionization

📝 Answered - In an oxidation-reduction reaction, the number of electrons lost is: 1. equal to the number of electrons gained 2. equal to the number of protons gained 3. less than the number of electrons gained 4. less than the number of protons gained

📝 Answered - Which statement describes one acid-base theory? 1. An acid is an H\(^+\) acceptor, and a base is an H\(^+\) donor. 2. An acid is an H\(^+\) donor, and a base is an H\(^+\) acceptor. 3. An acid is an H\(^-\) acceptor, and a base is an H\(^-\) donor. 4. An acid is an H\(^-\) donor, and a base is an H\(^-\) acceptor.

📝 Answered - Which notations represent different isotopes of the element sodium? A. \(^{32}S\) and \(^{34}S\) B. \(Na^+\) and \(Na^0\) C. \(S^{2-}\) and \(S^{6+}\) D. \(^{22}Na\) and \(^{23}Na\)

📝 Answered - Given the balanced equation representing a reaction: \[ H_2O + HCl \rightarrow H_3O^+ + Cl^- \] According to one acid-base theory, the \( H_2O \) molecule: 1. accepts \( H^+ \) ions 2. accepts \( OH^- \) ions 3. donates \( H^+ \) ions 4. donates \( OH^- \) ions

📝 Answered - In terms of entropy and energy, systems in nature tend to undergo changes toward: 1. lower entropy and lower energy 2. lower entropy and higher energy 3. higher entropy and lower energy 4. higher entropy and higher energy

📝 Answered - Which term identifies a type of organic reaction? 1. Deposition 2. Distillation 3. Esterification 4. Sublimation

📝 Answered - Which compounds are classified as Arrhenius acids? A. HCl and NaOH B. HNO3 and NaCl C. NH3 and H2CO3 D. HBr and H2SO4

📝 Answered - Which element reacts spontaneously with 1.0M HCl (aq) at room temperature? A. Copper B. Gold C. Silver D. Zinc

📝 Answered - Which term represents a type of nuclear reaction? 1. condensation 2. vaporization 3. single replacement 4. natural transmutation