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wariber [46]
3 years ago
7

Identify a human activity that impacts the land negatively then describe a positive action that can help rude effects caused by

the activity
giving brainiest
Chemistry
1 answer:
Lostsunrise [7]3 years ago
5 0
The number of trips one takes in a car should be reduced.

reduce or eliminate fireplace and wood stove use.

burning leaves, trash, and other materials should be avoided.

using gas-powered lawn and garden equipment should be also be avoided.
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PLEASE HELP!!!
kaheart [24]

2MnO4-(aq) + 16H+ + 10Cl-(aq) ⇔ 2Mn2+(aq) + 8H2O + 5Cl2 (g)

<h3>Further explanation</h3>

Given

Reaction(unbalanced)

Mno4- (aq) + Cl- (aq) → Mn2+ + Cl2 (g)

Required

Half reaction

Solution

1. Add coefficient(equalizing atoms in reaction)

2. Adding H₂O on the O-deficient side.  

3. Adding H⁺ on the H-deficient side.  

4. Adding e⁻

5. Equalizing the number of electrons and sum the all the half-reaction

1.MnO₄⁻(aq) = Mn²⁺(aq) reduction

2.MnO4(aq) = Mn2+(aq) + 4H2O

3. MnO4-(aq) + 8H+ = Mn2+(aq) + 4H2O

4. MnO4-(aq) + 8H+ + 5e- = Mn2+(aq) + 4H2O

Cl⁻(aq) = Cl₂(g) oxidation

1. 2Cl-(aq) = Cl2 (g)

2-3 none

4. 2Cl-(aq) = Cl2 (g) + 2e-

5.

MnO4-(aq) + 8H+ + 5e- = Mn2+(aq) + 4H2O x2

2Cl-(aq) = Cl2 (g) + 2e-                                    x5

2MnO4-(aq) + 16H+ + 10e- = 2Mn2+(aq) + 8H2O

10Cl-(aq) = 5Cl2 (g) + 10e-    

<em>2MnO4-(aq) + 16H+ + 10Cl-(aq) ⇔ 2Mn2+(aq) + 8H2O + 5Cl2 (g)</em>

3 0
3 years ago
what is the approximate area of a regular pentagon with a side lenghtt of 6 feet and a distance from the center to a vertex of 6
Degger [83]
A regular pentagon may be divided into 5 congruent triangles.


If the side of the pentagon is 6 feet, each base of the triangles will be 6 feet.


If the distance from the center to a vertex is 6 feet, all the sides of the triangles will 6 feet.


So there are 5 congruent, equilateral triangles each with side equal to 6 feet.


The area one of those triangles is calculateb by:


base * height / 2


height ^2 = (side length) ^2 - (side length /2)^2 = 6^2 - 3^2 = 36 - 9 = 27


=> height = √(27) ≈ 5.2 feet


And, using area = base * height / 2 ,


area of a triangle = 6 feet * 5.2 feet / 2 = 15.6 feet^2


And the area of the entire pentagon equals 5 triangles ≈ 5 * 15.6 feet^2 = 78 feet^2


Answer: 78 feet^2
6 0
3 years ago
How many atoms of gold are there in 5 moles of a gold sample ?
ss7ja [257]

Answer:

30.11 × 10²³ atoms

Explanation:

Given data:

Number of moles of gold = 5 mol

Number of atoms = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

5 mol × 6.022 × 10²³ atoms /1 mol

30.11 × 10²³ atoms

6 0
3 years ago
Who was Charles Darwin and what theory is he best known for?
Alona [7]

Answer:

Charles Darwin, in full Charles Robert Darwin, (born February 12, 1809, Shrewsbury, Shropshire, England—died April 19, 1882, Downe, Kent), English naturalist whose scientific theory of evolution by natural selection became the foundation of modern evolutionary studies.

Charles Darwin's theory of evolution states that evolution happens by natural selection. Individuals in a species show variation in physical characteristics. ... As a consequence those individuals most suited to their environment survive and, given enough time, the species will gradually evolve.

Explanation:

please mark me brainliest please

8 0
3 years ago
21.041gMg - 21.00gMg/ 24.31 (gmg/ mol Mg)
LenKa [72]

Answer:

molMG

Explanation:

8 0
3 years ago
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