What is the correct form dar the ions present in ammonium phosphite 17 Predict t

Question

What is the correct form dar the ions present in ammonium phosphite 17 Predict the formula of the compound formed when ions fal·um and nitrogen combine a) CaaNs c) CaNa d) CagNz e) CoNa 18.Indicate the missing words in the following statement: "Por an ordinary chemical reaction the mass of the products is the mass of the reactants." a) usually more than b) usually less than c) always less than d) always equal to 19.Which statement is incorrect a. The number of electrons lost by the cation(s) must equal the number gained by anion(s) in an ionic compound. b. Cations and anions combine in the simplest c. Ionic compounds generally contain metal and nonmetal elements. ratio which achieves electrical neutrality ulas of ionic compounds are written with the anion first, then the cation e. None of the above. 20. Consider the following grid: 5. 1. HCI 2. AlS 10. PCLs 8. NaCl Zt FeCl Compounds with a cation that has a +2 charge are found in cells(s): a) 3 only b) 4, 6 and 7 c)1 only d) 4 and 6 e) 2, 3 and 4 Dr. Skeete Eram I-2012

Explanation / Answer

16. Option e)None . NH4+ and PO43- is the right answer.

17. option d) Ca3N2 is formed.

18. option d) according to law of conservation.mass cannot de destroyed.So mass of products is always equals to mass of reactants.

19.option d) is incorrect as symbol of cation is written first.

20. option D is correct.

21. when two or more atoms with similar electronegativities combine they form a covalent bond. Option D is correct. 3 7 and 10

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