Concept explainers
(a)
Interpretation: The stable substance in each given pair is to be stated.
Concept introduction: Stability of compound depends on the size of atom involved in the compound formation. The small sized atom makes the compound less stable as compared to large sized atom.
(b)
Interpretation: The stable substance in each given pair is to be stated.
Concept introduction: Stability of compound depends on the size of atom involved in the compound formation. The small sized atom makes the compound less stable as compared to large sized atom.
(c)
Interpretation: The stable substance in each given pair is to be stated.
Concept introduction: Stability of compound depends on the size of atom involved in the compound formation. The small sized atom makes the compound less stable as compared to large sized atom.
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Chemistry: An Atoms First Approach
- 18. Name two ions associated with Group 1 cations, and explain what is the difference between Group 1 cations, and how do they differ from Group 4 cations? Give examples. 19. How can PbCl2 be separated from AgCl and Hg2Cl2arrow_forwardThe compound NF3 is quite stable, but NCl3 is very unstable (NCl3 was first synthesized in 1811 by P. L. Dulong, who lost three fingers and an eye studying its properties). The compounds NBr3 and NI3 are unknown, although the explosive compound NI3 NH3 is known. Account for the instability of these halides of nitrogen.arrow_forwardA Lewis structure obeying the octet rule can be drawn for O2 as follows: Use the molecular orbital energy-level diagram for O2 to show that the above Lewis structure corresponds to an excited state.arrow_forward
- Although nitrogen trifluoride (NF3) is a thermally stable compound, nitrogen triiodide (NI3) is known to be a highly explosive material. NI3 can be synthesized according to the equation BN(s) + 3IF(g) BF3(g) + NI3(g) a. What is the enthalpy of formation for NI3(s) given the enthalpy of reaction (307 kJ) and the enthalpies of formation for BN(s) (254 kJ/mol), IF(g) (96 kJ/mol), and BF3(g) (1136 kJ/mol)? b. It is reported that when the synthesis of NI3 is conducted using 4 moles of IF for every 1 mole of BN, one of the by-products isolated is [IF2]+[BF4]. What are the molecular geometries of the species in this by-product? What are the hybridizations of the central atoms in each species in the by-product?arrow_forwardThe standard enthalpy of formation of XeF4 is 218 kJ/mol. Use this value and the enthalpy of dissociation of the FF bond to calculate the XeF bond dissociation enthalpy.arrow_forwardWhat is the likelihood that hydrogen (H2) will become a widely used fuel and that the hydrogen economy will become a reality? In particular, what are the advantages and disadvantages of H2 as a fuel? What would be necessary for a significant conversion to a hydrogen economy?arrow_forward
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