Temperature

In an undisturbed stack of rock layers, each containing fossils of once-living organisms, where would some evidence of the most

Gwar [14]

Answer:

A. At the top of the rock stack.

Explanation:

4 0

4 years ago

Mercury and oxygen react to form mercury(II) oxide, like this: 2Hg (l) + O2 (g) → 2HgO (s) At a certain temperature, a chemist f

enyata [817]

Answer:

Kc = 12.4 M⁻¹

Explanation:

1) Chemical equilibrium

2Hg (l) + O₂ (g) ⇄ 2HgO (s) (the double arrow indicates an equilibrium reaction)

2) Equilibrium constant, Kc:

The equilibrium constant, Kc, is equal to product of the concentrations of each product,each raised to its stoichiometric coefficient / product of the concentrations of each reactant each raised to its stoichiometric coefficient.

Since the concentrations of liquid and solid substances remain practically constant, their value is incorporated into the constant Kc, and the equation only uses the concentrations of the aqueous or gaseous substances.

Thus, the equation to use is:

Kc = 1 / [O₂(g) ]

3) Determine the concentration of O₂ (g)

M = number of moles / volume in liters

Number of moles = mass in grams / molar mass

Number of moles of O₂ (g) = 13.4 g / 32.00 g/mol = 0.419 mol

M = 0.419 mol / 5.2 liter = 0.0806 mol / liter = 0.0806 M

4) Compute Kc

Kc = 1 / 0.0 806 M = 12.4 M⁻¹ ← answer

4 0

3 years ago

What's the balanced equation for Iron and copper (II) sulfate solution.

Georgia [21]

Answer:

2Fe + 3CuSO₄ → Fe₂(SO₄)₃ + 3Cu

Explanation:

The reactants are:

Iron = Fe

Copper (II) sulfate solution = CuSO₄

The reaction is given as:

Fe + CuSO₄ → Fe₂(SO₄)₃ + Cu

This is a single displacement reaction;

Now let us balance the equation;

aFe + bCuSO₄ → cFe₂(SO₄)₃ + dCu

Conserving Fe;

a = 2c

Conserving Cu;

b = d

Conserving S;

b = 3c

Conserving O;

4b = 12c

let b = 1;

c = $\frac{1}{3}$

d = 1

a = $\frac{2}{3}$

Multiply through by 3 to get whole numbers;

a = 2, b = 3, c = 1 and d = 3

2Fe + 3CuSO₄ → Fe₂(SO₄)₃ + 3Cu

5 0

3 years ago

Which statement best describes the domain and range of f(x) = -(7)X and g(x) = 7X7 O f(x) and g(x) have the same domain and the

Ivan

Answer:

The graph of this equation is shown in Figure 1. As you can see this is a straight line with negative slope and does not intersect the y-axis. So the ...

Explanation:

4 0

3 years ago

A galvanic (voltaic) cell consists of an inert platinum electrode in a solution containing 1.0 M tin(IV) ion and 1.0 M tin(II) i

Natasha_Volkova [10]

In the galvanic or voltaic cell, the standard cell potential is 1.67 V. The standard potential is the difference between the reduction potential of cathode and anode.

<h3>What is an electrochemical cell?</h3>

An electrochemical cell produces energy by a sponteanous chemical process. A galvanic or voltaic cell produces energy by a sponteanous chemical reaction.

Hence, given the standard reduction potentials;

Sn4+ + 2e- ==> Sn2+ Eº = 0.15 V (anode)

Co3+ + 2e- ==> Co2+ Eº = 1.82 V (cathode)

Eºcell = 1.82 V - 0.15 V = 1.67 V

Learn more about electrochemical cell: brainly.com/question/12034258

4 0

3 years ago