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Questions in chemistry

[Done] Given the balanced equation representing a reaction: \[ 4Al(s) + 3O_2(g) \rightarrow 2Al_2O_3(s) \] As the aluminum loses 12 moles of electrons, the oxygen: (1) gains 4 moles of electrons (2) gains 12 moles of electrons (3) loses 4 moles of electrons (4) loses 12 moles of electrons

[Done] Which element has atoms with the strongest attraction for electrons in a chemical bond? 1. Chlorine 2. Nitrogen 3. Fluorine 4. Oxygen

[Done] Which reaction is single replacement? 1. [tex]2H_2O_2 \rightarrow 2H_2O + O_2[/tex] 2. [tex]2H_2 + O_2 \rightarrow 2H_2O[/tex] 3. [tex]H_2SO_4 + Mg \rightarrow H_2 + MgSO_4[/tex] 4. [tex]HCl + KOH \rightarrow KCl + H_2O[/tex]

[Done] Which terms identify types of chemical reactions? A. decomposition and sublimation B. decomposition and synthesis C. deposition and sublimation D. deposition and synthesis

[Done] Which property is a measure of the average kinetic energy of the particles in a sample of matter? 1. mass 2. density 3. pressure 4. temperature

[Done] Which polyatomic ion is found in the compound represented by the formula [tex]$NaHCO_3$[/tex]? A. acetate B. hydrogen carbonate C. hydrogen sulfate D. oxalate

[Done] 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

[Done] 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

[Done] 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.

[Done] 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 \(^{23}Na\)