**Answer:**

**Explanation:**

We must use the Nernst equation

**Step 1. Calculate E°**

SO₄²⁻(aq) + 4H⁺(aq) + 2e⁻ ⇌ SO₂(g) + 2H₂O(ℓ)

<u>2Br⁻⇌ Br₂(aq) + 2e⁻ </u>

SO₄²⁻(aq) + 4H⁺(aq) + 2Br⁻(aq) ⇌ Br₂(aq) + SO₂(g) + 2H₂O(ℓ)

E° = 0.17 - 1.0873 = **-0.92 V**

**Step 2. Calculate Q**

E = 0 V

E° = -0.92 V

R = 8.314 J·K⁻¹mol⁻¹

T = 66 °C

n = 2

F = 96 485 C/mol

**Calculations: **

T = 66.0 + 273.15 = 339.15 K

<h2>Total distance divided by total elapsed time gives : Average speed </h2>

**Explanation:**

**Speed **

It is the distance traveled by body with respect to time .

Its formula is Speed = distance /time

V=S/T

units : m/sec or Km/hr

**Distance **

It is total path traveled by body in any direction .

It unit and symbol is : S and unit = m /Km

**Average speed **

It is the total distance traveled by body with respect to total time taken to travel that given distance .

Average speed = total distance /total time

A.s = T.D/T.T

unit = m/sec or Km/hr

**Instantaneous velocity **

It is the distance traveled by body at particular instant of time ,in given direction .

**Displacement **

It is the shortest path traveled by body in given direction .

**Answer:**

6 moles of ZnSO₄ produces 6 moles of Ag₂SO₄ .

**Explanation:**

**Given data:**

Moles of ZnSO₄ = 6.00 mol

Moles of Ag₂SO₄ = ?

**Solution:**

**Chemical equation:**

2Ag + ZnSO₄ → Ag₂SO₄ + Zn

Now we will compare the moles of ZnSO₄ and Ag₂SO₄.

ZnSO₄ : Ag₂SO₄

1 : 1

6.00 : 6.00

So 6 moles of ZnSO₄ produces 6 moles of Ag₂SO₄ .

Yes because it can not go back to its previous state

An example of a nuisance, oxygen reacts with iron to form rust.

This reaction involves the addition of oxygen, which is not needed.

2Fe(s) + 2H2O(l) + O2 (g)---> 2Fe^+2 (aq) + 4OH- (aq)