53. N2 is a stable molecule and the N4 molecule is unknown. P4 is much more...
53. N2 is a stable molecule and the N4 molecule is unknown. P4 is much more stable than molecular P2. Which is the best explanation for this difference?
(A) N2 has valence electrons only in bonding and nonbonding orbitals, while P2 has some valence electrons in antibonding orbitals.
(B) The greater electronegativity of N compared to P stabilizes compounds with lower molar masses.
(C) The greater size of P compared to N results in decreased overlap in pi bonds.
(D) The preference of P to adopt smaller bond angles than N favors formation of tetrahedral P4 molecules
53 is C, please explain?
16. Which statement is correct about the critical point of a phase diagram? (A) Solid, liquid and gas are present in equilibrium. (B) Liquid and vapor are indistinguishable from one another. (C) Liquid can be produced by a change in pressure. (D) Vapor can be produced by a change in temperature.
16 is B but isn't C true as well?
26. Which units are appropriate for a reaction rate? (A) mol·L–1 ·s–1 (B) mol·L–1 (C) mol·L·s–1 (D) L·mol–1 ·s–1
26 is A (0th order I guess) but isn't D (2nd order) a possible answer as well?
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53. N2 is a stable molecule and the N4 molecule is unknown. P4
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