5. Which of the following represents the least number of molecules? A. 30.0 g of H20...
7. What is the mass percent of sodium acetate in a solution prepared by dissolving 25.0 g of sodium acetate in 150.0 g of water? A. 0.167 % B. 83.3% C. 16.7 % D. 0.143 % E. 14.3 %
Which of the following reactions is an oxidation-reduction reaction? A) NH4HS(s) → NH3(g) + H2S(g) B) 2 NaHCO3(s) → Na2CO3(s) + H2O(g) + CO2(g) C) N2O4(g) → 2 NO2(g) D) 2 SO2(g) + O2(g) → 2 SO3(g) E) 2 HC2H3O2(aq) + Ba(OH)2(aq) → Ba(C2H3O2)2(aq) + 2 H2O(l)
8 The Following reaction is classified as: 2HCl(aq) + Ba(OH)2(aq) → BaCl(aq) + 2 H20(0) b) precipitation reaction oxidation-reduction reaction d) acid-base neutralization reaction 9. c) single replacement What is the volume of 0.1220 M HNO, solution required to completely neutralize 17.50 ml of 0.1211M NAOH? Reaction is: HNO, (aq) + NaOH(aq) -NaNO, (aq) + H:0 (aq) a) 17.37 ml b) 16.31 ml. c) 15.39 ml. d) 17.84 mL 10. Which one of the following reactions is the reduction reaction?...
Q(7) The reaction system POBr3(g) - POBr(g) + Brz(g) is at equilibrium. Which of the following statements describes the behavior of the system if POBr is added to the container? A) The reverse reaction will proceed to establish equilibrium. B) The partial pressures of POBra and POBr will remain steady while the partial pressure of bromine increases. C) The partial pressure of chlorine will increase while the partial pressure of POB decreases. D) The partial pressure of chlorine remains steady...
What is the answer to question 15, 16, 17 and 18, and also how did you calculate it 15) (5 pts) equilibrium information below: Calculate the initial pH of the solution given the following reaction and Ca(OH)2(s) Ca+(aq) +20H-(ag) with Kso 1.3 x 105 A) 12.1 B) 11.8 C) 10.3 D) 8.2 E) None of these choices are correct 2x 13x6 (x) 2. 6.3x106 (x) 2 -0.0036 -10002 0.0072 16) (5 pts) How many moles of sodium acetate (conjugate base)...
1. Which of the following make a buffer solution? (circle all the correct answers) a. 0.1 M HCl and 0.1 M NaCl b. 0.1 M HF and 0.075 M KF C. 0.15 M Pentanoic acid and 0.15 M sodium pentanoate d. 0.1 M NaOH and 0.1 M HCI e. 0.1 M acetic acid and 0.00001 sodium acetate 2. Which of the following could make buffer systems when mixed together? (circle the correct answers) a. 0.10 M acetic acid and 0.05...
Which of the following is so oxidation-reduction reaction? A) Cu (s) + 2AgNO_3(aq) rightarrow 2Ag (s) + Cu(NO_3)_2 (aq) B) HCl(aq) + NaOH(aq) rightarrow H_2O (l) + NaCl(aq) C) AgNO_3(aq) + HCl (aq) rightarrow AgCl (s) + N\HNO_3(aq) E) H_2CO_3(aQ) + Ca(NO_3)_2 (aq) rightarrow 2HNO_3(aq) + CaCO_3(s) How many moles of K^+ are present in 343 mL of a 1.27 M solution of K_3PO_4? A) 0.436 B) 1.31 C) 0.145 D) 3.70 E) 11.1 What is the concentration (M) of...
4.) (20%) Which one of the following is an acid base reaction? a) C(s) + O2(g) → CO2(g) b) 2 HCl(aq) + Ca(OH)2(aq) + 2 H2O(1) + CaCl2(aq) c) Fe(s) + 2 AgNO3(aq) — 2 Ag(s) + Fe(NO3)2(aq) d) MgSO4(aq) + Ba(NO3)2(aq) + Mg(NO3)2(aq) + BaSO4(s) e) None of the above are acid base reactions.
Test IV (Electrochemistry) 2018 Fall What is the oxidation number for the Which of the following is true concerning a galvanic cell? (A) Oxidation occurs at the anode and is 1. 8. underlined manganese in Mn04 (A)-8 (8)-2 (C)-1 (D)4 (E) 7 where anions move towards where anions move towards where cations move towards where anions move towards where anions move towards 2. When balancing the below half-reaction in acidic solutionelectrons are added to the (B) Oxidation occurs at the...
1. Which of the following reaction represents cathode reaction in chrom plating? a. Cr (s) → Cr6+ (aq) + 6 e¯ b. Cr (s) → Cr3+ (aq) + 3 e¯ c. Cr3+ (aq) + 3 e¯ → Cr (s) d. Cr (s) → Cr3+ (aq) + 6 e¯ 2. The molar solubility of AgBr is 6.3 × 10−7 M. What is its Ksp? 3. Co2+ (aq) + 6 H2O (l) ⇌ Co(H2O)62+ (aq) the ligand(s) is/are: a. Co2+ b. Co(H2O)62+...