For the reaction: 2 NO2 (g) ⇌ 2 NO (g) + O2 (g), suppose the equilibrium pressures of the gasesare: P(NO2) = 0.32 atm P(NO) = 2.6 atm P(O2) = 0.39 atm. What is the value of Keq ? a. 3.17 b. 0.316 c. 9.90 d. 0.0388 e. 25.7 Tables.pdf Periodic Table with New Elements.pdf

What is the correct formula for Sodium chromate? a. Na2CrO4 b. Na(CrO4)2 c. Na(CrO3)2 d. Na2CrO3 e. Na2Cr Tables.pdf Periodic Table with New Elements.pdf

What is the correct formula for Manganese(II) acetate? a. Mn2C2H3O2 b. MnC2O4 c. Mn(C2H3O2)2 d. Mn(HC2H3O2)2 e. MnC2H3O2 Tables.pdf Periodic Table with New Elements.pdf

If [OH-] = 8.7 x 10-10 M, what is the pH?   a.  2.6 b.  9.1 c.  -9.1 d.  4.9 e . -4.9 Tables.pdf   Periodic Table with New Elements.pdf

If pH = 11.2, what is [OH-]?   a.  1.6 X 10 -3  M b.   1.6 X 10 11  M c.  6.3 X 102  M d.  6.1 x 10-2 M e.  6.3 x 10-12 M Tables.pdf Periodic Table with New Elements.pdf

What is [H+ ] when pH = 6.2?   a.   6.3 X 10-7 M b.  1.6 X 106 M c. 1.6 X 10-8 M d. 1.6 X 10-15 M e.  7.8 M Tables.pdf Periodic Table with New Elements.pdf

For the reaction: 2 NO (g) + Cl2 (g)  ⇌  2 NOCl(g),   Keq = 2500If a chemist runs the reaction with the following initial pressures: P(NO) = 3.0 atm  P(Cl2) = 12.0 atm  P(NOCl) = 175 atm Calculate Q and determine which way the reaction will shift to reach equilibrium.(That is, which of the following is entirely correct?) a. Q = 2500, no shift occurs. b. Q = 284, reaction shifts to the right.  c. Q = 284, reaction shifts to the left. d. Q = 4.86, reaction shifts to the right. e. Q = 4.86, reaction shifts to the left. Tables.pdf Periodic Table with New Elements.pdf

Classify H2CO3 as a strong acid, weak acid, strong base, or weak base, and then answer the following question. What is the pH of 0.05 M H2CO3 (aq)?   a. 3.84 b. 6.38 c. 3.19 d. 1.30 e. 10.16 Tables.pdf Periodic Table with New Elements.pdf

If pOH = 11.4, what is [H+]?   a. 4.0 x 10-12 M b. 2.5 x 1011 M c. 4.0 x 102 M d. 2.5 x 10-3 M e. 4.1 x 10-2 M Tables.pdf Periodic Table with New Elements.pdf

For a chemical reaction at a given temperature, which one of the following statements about Q and Keq istrue? a. If Q > Keq , the reaction will shift to the right to reach equilibrium.b. The reaction can have only one Q value.c. Keq is calculated by plugging in initial pressures or concentrations.d. Q and Keq cannot be equal.e. The reaction can have only one Keq value.   Tables.pdf Periodic Table with New Elements.pdf