An electrochemical cell is based on the following two half-reactions:

Ox: Sn(s)→Sn2+(aq, 1.65 M )+2e−

Red: ClO2(g, 0.165 atm )+e−→ClO−2(aq, 1.90 M )

Compute the cell potential at 25 ∘C.

Consider mixing an excess of lead(II) nitrate (aq) with 200.0 mL of 0.400 M sodium chloride. Determine the mass of solid formed, assuming a complete reaction

What volume (in mL) of 0.800 M lead(II) nitrate must you add to make sure you make the mass of product you calculated in problem 3?

A 0.1044 g sample of the salt MCl was dissolved in water (making it in the aqueous phase). An excess of AgNO3 (aq) was added, precipitating 0.0889 g AgCl. What is the identity of M?

For the following reactions, state whether you expect ΔSrxn to be positive or negative.

•Ag+(aq) + Cl–(aq) → AgCl(s)

•H2O(s) → H2O(g)

•H2(g) + Cl2(g) → 2HCl(g)

•N2(g) + 3H2(g) → 2NH3(g)

•H2O(l) → H2O(s)

•2H2(g) + O2(g) → 2H2O(g)

•2NO2(g) → N2O4(g)

•CO2(g) → CO2(s)

•2Hg(l) + O2(g) → 2HgO (s)

Question is graded for accuracy so best answers please

A 5.65 −g sample of a weak acid with Ka=1.3×10−4 was combined with 5.20 mL of 5.90 M NaOH and the resulting solution was diluted to 750 mL. The measured pH of the solution was 4.30. What is the molar mass of the weak acid?

**please show work

Discuss the most important factors that influence the oxidation processes of sulphide minerals. Use the relevant equations/information whenever it is appropriate. (maximum 250 words)

Iron (III) ion and thiocyanate ion exists in equilibrium with iron thiocyanate ion. The reaction, as written, is exothermic. Given that the FeNCS²⁺
product is a deep red color and the reactants are nearly colorless, which of the following will cause the solution to bedarker in color at equilibrium?
Fe³⁺(aq) + NCS^–(aq) ↔ FeNCS²⁺(aq)

1) Cyclopropane, a substance used with oxygen as a general anesthetic, contains only two elements, carbon and hydrogen. When 1.00 g of this substance is completely combusted, 3.14 g of CO2 and 1.29 g of H2O are produced. What is the empirical formula of cyclopropane?

2) Isobutyl propionate is the substance that provides the flavor for rum extract. Combustion of a 1.152 g sample of this carbon-hydrogen-oxygen compounds yields 2.726 g CO2 and 1.116 g H2O. What is the empirical formula of isobutyl propionate?

In the Chemical Equilibrium experiment, the effect of interacting equilibria was studied using the following chemical reactions. Addition of which species will cause the primary equilibrium to shift to the right? Select any/all that apply.

Primary Equilibrium: Fe3+(aq) + SCN-(aq) ⇌ [Fe(SCN)]2+(aq)

Interactive Equilibria: Fe3+(aq) + 3OH-(aq) ⇌ Fe(OH)3(s)

Fe3+(aq) + 3C2O42-(aq) ⇌ [Fe(C2O4)3]3-(aq)

Ag+(aq) + SCN-(aq) ⇌ AgSCN(s)

1 OH-(aq)

2 SCN-(aq)

3 [Fe(SCN)]2+

4 Ag+(aq)

5 Fe3+(aq)

6 C2O42-(aq)

A chemist fills a reaction vessel with 1.54 atm nitrogen N 2 gas, 4.42 atm oxygen O 2 gas, and 8.99 atm nitrogen monoxide NO gas at a temperature of 25.0 ° C . Under these conditions, calculate the reaction free energy Δ G for the following chemical reaction: + N 2 g O 2 g 2 NO g Use the thermodynamic information in the ALEKS Data tab. Round your answer to the nearest kilojoule. kJ

A mixture of 0.05263 mol of H2O, 0.01327 mol of CH4, 0.07198 mol of CO, and 0.06917 mol of H2 is placed in a 1.0-L steel pressure vessel at 1303 K.

The following equilibrium is established: 1 H2O(g) + 1 CH4(g) 1 CO(g) + 3 H2(g) At equilibrium 0.009871 mol of CH4 is found in the reaction mixture.

(a) Calculate the equilibrium partial pressures of H2O, CH4, CO, and H2.

Peq(H2O) = .

Peq(CH4) = .

Peq(CO) = .

Peq(H2) = .

(b) Calculate KP for this reaction. KP = ?

At 35^oC, K = 1.6 x 10^-5 for the following reaction

2NOCl(g) <----> 2NO(g) +    Cl₂(g)

Calculate the concentration of all species at equilibrium for each of the following original mixtures.

1) 3.0 moles of pure NOCl in a 2.0 L flask

2) 2.0 moles of NOCl and 2 moles of NO in a 3 L flask

3) 3.0 moles of NOCl 1 mole of Cl₂ in a 2.0 L flask

Show work please

Find the net ionic reaction (precipitation). Write NR if there is no reaction.

(AlCl3 + KI)

(Zn(C2H3O2)2 + KI)

(AlCl3 + AgNO3)

(Zn(C2H3O2)2 + AgNO3)

(AlCl3 + Na2CO3)

(Zn(C2H3O2)2 + Na2CO3)

(AlCl3 + NaOH)

(Zn(C2H3O2)2 + NaOH)

(AlCl3 + Na3PO4)

(Zn(C2H3O2)2 + Na3PO4)

(AlCl3 + Pb(NO3)2)

(Zn(C2H3O2)2 + Pb(NO3)2)

(CuSO4 + (Zn(C2H3O2)2)

(AlCl3 + (Zn(C2H3O2)2)

(CuSO4 + AlCl3)

Describe the nature of “random error” and “systematic error”. Provide three examples for each of these two categories of errors. Could they be eliminated and how?

What is denitrification in the context of ozone depletion, and why is it important?

Group of answer choices

a) Denitrification is the significant lowering of the concentration of N₂ (g) in the stratosphere. This process is crucial to ozone formation, as it creates space in the stratosphere for formed ozone to reside.

b) Denitrification is the removal of NO₂ (g) from the stratosphere. This process increases ozone depletion, since it prevents ClO (g) from being stored as catalytically inactive ClONO₂ (g)

c) Denitrification is removal of NO (g) from the stratosphere. This is important because NO can act as a significant X catalyst and drive ozone depletion.