Explain why the lattice energy of CaSe is approximately 4 times as large as that of KBr. Check all that apply. Check all that apply. According to Coulomb’s law, the Ca and Se ions have 4 times the attractive force (2+ × 2-) than that of the K and Br ions (1+ × 1-). According to Coulomb’s law, the Ca and Se ions have 4 times the repulsive force (2+ × 2-) than that of the K and Br ions (1+ × 1-). The lattice energy depends only on the sizes of constituent ions of the compound. The Ca2+ and K+ ions are four times larger in size than the Se2- and Br- ions. They Ca2+ and K+ ions are similar in size, as are the Se2- and Br- ions. Thus, the major difference in the lattice energies for these two compounds is due to the difference in the magnitude of the ionic charge on each ion. The lattice energy depends on the sizes of constituent ions of the compound. The Ca2+ is four times larger in size than the Se2- ion.

Many reactions take place in aqueous solution. when potential reactants are mixed, a reaction will occur if there is some driving force that favors the formation of products. it is often convenient to categorize reactions in terms of these driving forces: precipitate formation, in which an insoluble solid is formed, weak electrolyte formation, as in a neutralization reaction involving water, or transfer of electrons, as in a redox reaction. these reactions can be represented by full molecular equations, which contain all species in the reaction mixture, or by net ionic equations, which show only the species that actually undergo a change. the latter does not contain the spectator ions, which do not undergo a net change or do not take part in the reaction. part a when the following two solutions are mixed: k2co3(aq)+fe(no3)3(aq) the mixture contains the ions listed below. sort these species into spectator ions and ions that react. drag the appropriate items to their respective bins. view available hint(s) spectator ions ions that react part b what is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? assume that the contribution of protons from h2so4 is near 100 %.ba(oh)2(aq)+h2so4(aq)→ express your answer as a chemical equation. view available hint(s) nothing provide feedback

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.