Question

One mole of ____ contains the least number of atoms. A) S_8 B)CH_4 C)Al_2(SO_4)_3 D)Na_3PO_4 E) C_6H_14 Which of these compounds is a weak electrolyte? A) NaCl B) HNO_3 C) C_6H_12O_6 (glucose) D) CH_3COOH (acetic acid) E) H_2SO_4 For the reaction shown below, which of the following is a conjugate acid-base pair? C_5H_5N(aq) + H_20(l) C_5H_5NH^+(aq) + OH^-(aq) A) C_5H_5N. H_2O B) C_5H_5N, C_5H_5N C) C_5H_5NH^+, OH^- D) H_2O. C^5H_5NH^+ E) H_2O, OH^- The reaction shown below is at equilibrium. Use lessthanorequalto Chatelier's principle to predict the effect of reducing nitrogen gas to the equilibrium reaction mixture. N2(g) + 3H_2(g) 2NH_3(g) A) The equilibrium position will remain unchanged. B) The equilibrium position will shift to the side of products. C) The equilibrium position will shift to the side of reactants. D) The equilibrium constant will increase. E) The equilibrium constant will decrease. Which of the following is a process with a negative Delta S? A) H_2O(l) rightarrow H_2(g) B) H_2O(s) rightarrow H_2(l) C) H_2O(l) rightarrow H_2(s) D) CO_2(s) rightarrow CO_2(g) E) CaCO_3(s) rightarrow CaO(s) + CO_2(g)

please help ASAP

Answer 1

1 . 1 mole S₈ = 8 moles of S atom

1 mole CH₄ ----> 1 mole C + 4 mole H ----> 5 moles of atom

1 mole Al₂(SO₄)₃  -----> 2 mole Al³⁺ + 3 mole SO₄^3- -----> 5 moles of atom

1 mole Na₃PO₄   ----> 3 mole Na⁺   + 1 mole PO₄^3-   -------> 4 moles of atom

1 mole C₆H₁₄   -----> 6 mole C + 14 mole H -----> 20 moles of atom

So Na₃PO₄ contains least number of atoms that is 4,

Therefore option (D) is correct.