Consider the following grid: Fe(CO_3)_2 Fe_3(PO_4)_2 Fe(NO_3)_3 Ca_3(PO_4)_2 Al

Question

Consider the following grid: Fe(CO_3)_2 Fe_3(PO_4)_2 Fe(NO_3)_3 Ca_3(PO_4)_2 Al (ClO_3)_3 NH_4NO_3 K_2CO_3 MgCO_3 Na_2SO_4 (NH_4)_2SO_4 Compounds with a positively charged polyatomic ion are in cells: 2 & 3 6, 10 1 & 2 7 & 8 Using the following balanced equation 4NH_3(g) + 3O_2(g) rightarrow 2N_2(g) + 6H_2O(g) The moles of oxygen needed to react with 6.50 moles of ammonia 2.80 moles 5.63 moles 4.88 moles 1.80 moles Using the following balanced equation 4NH_3(g) + 3O_2(g) rightarrow 2N_2(g) + 6H_2O(g) The mass of oxygen needed to react with 5.50 moles of ammonia (NH_3) 129.2 g 132.2 g 66.1 g 120.1 g Which of the following is valid electron configurations? 1S^2S^12p^1 1S^2 2S^2 2p^4 3S^1 1S^2 2S^2 2p^5 3S^1 3p^6 1S^2 2S^2 2p^6 3S^2 3p^1

Explanation / Answer

Ans 2. B) 6 and 10

6 is NH4NO3 which dissociates as NH4+ and NO3- so ammonium is the positively charged ion here which has two different atoms in it , nitrogen and hydrogen

10 is (NH4)2SO4 which dissociates as NH4+ and SO42-, so again the positively charged ion is ammonium which has two different atoms nitrogen and hydrogen.

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