1. When two hydrogen atoms react to form a hydrogen molecule, the shared pairs o

Question

1. When two hydrogen atoms react to form a hydrogen molecule, the shared pairs of electrons... A) have more potential energy because they are now attracted by two nuclei instead of a single nucleus. B) have less potential energy because they are now held more firmly to one nucleus than the other.    C) have less potential energy because they are now attracted by two nuclei instead of a single nucleus.     D) have more potential energy because they are now held more firmly to one nucleus than the other. 2.  Rank the following in order of increasing mass: 1.0 mole of methane (CH4), 0.50 mole of water (H2O), 0.20 mole of Fe, and 0.010 mole of U. A) H2O < CH4 < U < Fe    B) U < Fe < H2O < CH4        C) H2O < CH4 < Fe < U        D) U < H2O < CH4 < Fe        E) U < H2O < Fe < CH4 1. When two hydrogen atoms react to form a hydrogen molecule, the shared pairs of electrons... A) have more potential energy because they are now attracted by two nuclei instead of a single nucleus. B) have less potential energy because they are now held more firmly to one nucleus than the other.    C) have less potential energy because they are now attracted by two nuclei instead of a single nucleus.     D) have more potential energy because they are now held more firmly to one nucleus than the other. 2.  Rank the following in order of increasing mass: 1.0 mole of methane (CH4), 0.50 mole of water (H2O), 0.20 mole of Fe, and 0.010 mole of U. A) H2O < CH4 < U < Fe    B) U < Fe < H2O < CH4        C) H2O < CH4 < Fe < U        D) U < H2O < CH4 < Fe        E) U < H2O < Fe < CH4 A) have more potential energy because they are now attracted by two nuclei instead of a single nucleus. B) have less potential energy because they are now held more firmly to one nucleus than the other.    C) have less potential energy because they are now attracted by two nuclei instead of a single nucleus.     D) have more potential energy because they are now held more firmly to one nucleus than the other. 2.  Rank the following in order of increasing mass: 1.0 mole of methane (CH4), 0.50 mole of water (H2O), 0.20 mole of Fe, and 0.010 mole of U. A) H2O < CH4 < U < Fe    B) U < Fe < H2O < CH4        C) H2O < CH4 < Fe < U        D) U < H2O < CH4 < Fe        E) U < H2O < Fe < CH4 A) have more potential energy because they are now attracted by two nuclei instead of a single nucleus. B) have less potential energy because they are now held more firmly to one nucleus than the other.    B) have less potential energy because they are now held more firmly to one nucleus than the other.    B) have less potential energy because they are now held more firmly to one nucleus than the other.    C) have less potential energy because they are now attracted by two nuclei instead of a single nucleus.     C) have less potential energy because they are now attracted by two nuclei instead of a single nucleus.     C) have less potential energy because they are now attracted by two nuclei instead of a single nucleus.     D) have more potential energy because they are now held more firmly to one nucleus than the other. 2.  Rank the following in order of increasing mass: 1.0 mole of methane (CH4), 0.50 mole of water (H2O), 0.20 mole of Fe, and 0.010 mole of U. A) H2O < CH4 < U < Fe    B) U < Fe < H2O < CH4        C) H2O < CH4 < Fe < U        D) U < H2O < CH4 < Fe        E) U < H2O < Fe < CH4 D) have more potential energy because they are now held more firmly to one nucleus than the other. 2.  Rank the following in order of increasing mass: 1.0 mole of methane (CH4), 0.50 mole of water (H2O), 0.20 mole of Fe, and 0.010 mole of U. A) H2O < CH4 < U < Fe    B) U < Fe < H2O < CH4        C) H2O < CH4 < Fe < U        D) U < H2O < CH4 < Fe        E) U < H2O < Fe < CH4 D) have more potential energy because they are now held more firmly to one nucleus than the other. 2.  Rank the following in order of increasing mass: 1.0 mole of methane (CH4), 0.50 mole of water (H2O), 0.20 mole of Fe, and 0.010 mole of U. A) H2O < CH4 < U < Fe    B) U < Fe < H2O < CH4        C) H2O < CH4 < Fe < U        D) U < H2O < CH4 < Fe        E) U < H2O < Fe < CH4 A) H2O < CH4 < U < Fe    B) U < Fe < H2O < CH4        A) H2O < CH4 < U < Fe    B) U < Fe < H2O < CH4        C) H2O < CH4 < Fe < U        D) U < H2O < CH4 < Fe        E) U < H2O < Fe < CH4

Explanation / Answer

1) have less potential energy because they are now held more firmly to one nucleus than the other.



2) B) U < Fe < H2O < CH4

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