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- Predict which of these compounds are ionic and which are covalent.(A) Ca3N2(B) Li2CO3(C) PCl5(D) NaOH(E) CH4(F) MgOGive a reason why each of the following statements is a safeprediction:(a) Every compound of Rb with a nonmetal is ionic in character.(b) Every compound of nitrogen with a halogen element is amolecular compound.(c) The compound MgKr2 does not exist.(d) Na and K are very similar in the compounds they form withnonmetals.(e) If contained in an ionic compound, calcium (Ca) will be inthe form of the doubly charged ion, Ca2Which of the following sets contains an ionic compound, a molecular compound, and an acid, in that order? (A) Al2O3, B2O3, CH3OH; (B) CaCl2, NH4Cl, HCl; (C) CH3F, COCl2, HOCl; (D) CoCl2, COCl2, HClO2.
- 29. Which of the following particles has a central atom that does NOT obey the octet rule in its most stable form? (А) HCN (B) H2O (C) ВеН2 (D) PClз 30. A sample of element X contains 90% X-35, 8.0% X-37, and 2.0% X-38 atoms. The average atomic mass will be closest to which value? (A) 35 (B) 36 (C) 37 (D) 38 31. What is the molecular geometry of carbon dioxide, CO2? (A) Bent (B) Tetrahedral (C) Trigonal pyramidal (D) LinearA compound of gallium with chlorine has a melting point of 350 K (77 °C) and a boiling point of 474 K (201 °C). Is the compound ionic or covalent? What is a likely formula?What is the charge on each ion in these compounds? (d) ScCl3
- Write formulas for the compounds:(i) iodic acidTestosterone is an anabolic steroid. The structure of testosterone is shown below. What is the idealised bond angle at the indicated atom (ii) ? Hint: atom (iv) has been completed for you as an example. (iv) bond angle: 109.5°, geometry of the electron pairs: tetrahedral, shape of the bonds: tetrahedral ·····|||I H ····||||I ii ivThe charge of a vanadium ion in a compound V2O5 is?