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Akimi4 [234]
3 years ago
10

Help Please !!!

Chemistry
2 answers:
qaws [65]3 years ago
6 0

1. Why is preserving biodiversity in the Galápagos islands an important worldwide concern ?

Many species unique to the islands may become extinct.

2. What do the Endangered Species Act and the Convention on Biological Diversity have in common?

Their aim is to prevent extinctions.

3. What is a greenhouse gas?

a gas that absorbs and re-releases heat radiated by the earth

4. Lowering sulfur dioxide emissions would have the greatest impact upon which of the following environmental phenomena?

acid rain

5. Which of the following is beneficial to human health and the environment?

stratospheric ozone

6. Which of the following contributes to global warming?

greenhouse gases

7. An incident in Donora, Pennsylvania, led to which of the following actions?

enacting air pollution laws

8. Which of the following is not a greenhouse gas?

water vapor

9. What is the most common method of solid waste disposal in the United States?

landfill

10. Which device is used to reduce gaseous emissions from a mobile source?

scrubber 

satela [25.4K]3 years ago
5 0

1) Answer is: Many species unique to the islands may become extinct.

The Galapagos Islands has some of the highest levels of endemism (species found nowhere else on Earth).

About 80% of the land birds, 97% of the reptiles and land mammals and more than 30% of the plants are endemic. More than 20% of the marine species in Galapagos are found nowhere else on earth.

For example, Galapagos tortoise, marine iguana, flightless cormoran and the Galapagos penguin.

2) Answer is: Their aim is to prevent extinctions.

The Endangered Species Act (1973) is USA law to protect species from extinction, because it prohibits:

1) harming or killing endangered species.

2) the import and export of endangered species.

Biodiversity is the variety and variability of life on Earth; more diversity, more species.

The Convention on Biological Diversity is a multilateral treaty for the conservation and use of biological diversity.

3) Answer is: a gas that absorbs and re-releases heat radiated by the Earth.

Most often greenhouse gases are carbon dioxide and methane. They come from burning multiple substances: coal, petroleum, natural gas.

Carbon dioxide (CO₂) and energy (heat) is produced by combustion of fossil fuels, that energy is used for producing electricity (the heat energy of combustion is converted into mechanical energy).

For example, coal power plants use coal to heat water into steam, that steam.

Carbon credits is a component of national and international attempts to lower the growth in concentrations of greenhouse gases.

One carbon credit is equal to one tonne of carbon dioxide.

4) Answer is: acid rain.

Fossil fuel combustion increases the acidity of rain because the sulfur dioxide is produced.

Because of fuel combustion,  sulfur dioxide goes up into the atmosphere as the hot gases rise, than it reacts with water and oxygen in the air and form sulfuric  acid:

Balanced chemical reaction: SO₂(g) + 2O₂(g) + 2H₂O → 2H₂SO₄.

pH (potential of hydrogen) is a numeric scale used to specify the acidity or basicity an aqueous solution.

When pH is less than seven (pH<7), solution is acidic.

5) Answer is: stratospheric ozone.

Moving upward from ground level, layers of Earth's atmosphere are: the troposphere, stratosphere, mesosphere and thermosphere.

The stratosphere extends from the top of the troposphere to about 50 km above the ground.

The Ozone layer is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation.  

Molecular formula of ozone is O₃.

Ozone is allotrope of oxygen and he is less stable. Because his unstability in high concentration, ozone decaying to diatomic oxygen.

6) Answer is: greenhouse gases.

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range.

Global warming is rise in the average temperature of the Earth's climate system.

Most often greenhouse gases are carbon dioxide and methane. They come from burning multiple substances: coal, petroleum, natural gas.

Greenhouse gases are so difficult to measure, because carbone dioxide, methane, chlorofluorocarbons comes from multiple sources, some of which are relatively hard to measure.

7) Answer is: enacting air pollution laws.

An incident in Donora (1948) was air inversion that resulted in a wall of smog that killed 20 people.

An incident in Donora is credited for helping to trigger the clean-air movement in the United States, whose crowning achievement was the Clean Air Act of 1970.

The Clean Air Act is a United States federal law designed to control air pollution on a national level.

8) Answer is: sulfur dioxide.

Sulfur dioxide (SO₂) is very common volcanic gas.

The greenhouse gases in Earth's atmosphere are water vapor (H₂O(g)), carbon dioxide (CO₂), methane (CH₄), nitrous oxide(N₂O) and ozone (O₃).

The average temperature of Earth's surface, without greenhouse gases would be about −18°C.

9) Answer is: landfill.

About 262 million tons of solid waste disposal were generated in the United States:

1) 52.5% of waste is landfilled.

2) 25.8% of waste is recycled,

3) 12.8% waste-to-energy combustion.

4) 8.9% composted.

Landfills should be created in places with low groundwater level and far from sources of flooding.

10) Answer is: catalytic converter.

Reactions occur faster  with a catalyst because they require less activation energy.

Catalytic converter splitts up the molecules after they leave a a mobile source (for example car's engine) and before they get released into the air.

It reduces emissions rather than eliminate them completely.

Usually converter is made from platinum, palladium or rhodium.

You might be interested in
The coefficients in a balanced chemical equation represent
Dafna1 [17]
The coefficients in a chemical equation represent the molar ratio of the substances.

For example, if an equation says 2H2 + O2 ⇒ 2H2O, it means
2 moles of H2 + 1 mol of O2 ⇒ 2 moles of H2O.
8 0
3 years ago
What neutral element has the electron configuration described by the Aufbau diagram above.​
devlian [24]

Answer:

Aluminium.

Explanation:

The above electronic configuration can be written in a simplified form as shown below:

1s² 2s²2p⁶ 3s²3p¹

Next, we shall determine the number of electrons in the atom of the element as follow:

Number electron = 2 + 2 + 6 + 2 + 1

Number of electron = 13

Next, we shall determine the number of protons.

Since the element is in its neutral state,

The number of electrons and protons are equal i.e

Proton = Electron

Number of electron = 13

Proton = Electron = 13

Proton = 13

Next, we shall determine the atomic number of the element.

The atomic number of an element is simply the number of protons in the atom of the element i.e

Atomic number = proton number

Proton = 13

Atomic number = 13

Comparing the atomic number of the element with those in the periodic table, the element with the above electronic configuration is aluminium since no two elements have the same atomic number.

5 0
3 years ago
You are burning wood to heat water for your industrial process. What is the mass of wood required to raise the temperature of 10
natta225 [31]

Answer:

18,8kg of wood

Explanation:

The energy you need to to raise the temperature of 1000 kg of water from 25.0 to 100.0 °C is:

q = C×m×ΔT

Where: q is heat, C is specific heat of water (4,184J/g°C), m is mass in grams (1000x10³g), and ΔT is 100,0°C - 25,0°C = 75,0°C

Replacing:

q = 4,184J/g°C×1000x10³g×75,0°C

<u><em>q = 3,14x10⁸ J of heat are required</em></u>

<u><em /></u>

Now, if the heating value of dry wood is 16,72 MJ/kg = 16,72x10⁶ J/kg, mass of wood required is:

3,14x10⁸J × (1kg / 16,72x10⁶ J) = <em>18,8 kg of wood are required</em>

<em></em>

I hope it helps!

5 0
3 years ago
Please help don’t understand this I attached the question
Rasek [7]

Answer:

58.32

Explanation:

The mass number is one mole and for Mg it is 24.306 for O it is 15.999 and for H it is 1.008. because O and H have 2, you multiply them by 2 and add all the numbers and it equals 58.32

8 0
11 months ago
Read 2 more answers
How might you explain the difference between the pH values of the 0.01 M HCl (pH = 1.1) and the 0.01 M HC2H3O2 (pH = 3.6)?
JulsSmile [24]
The difference is due to the degree of dissociation of the substances. HCl dissociates completely into ions when added to water, while this is not the case for HC₂H₃O₂; therefore, HCl has a lower pH.
7 0
3 years ago
Read 2 more answers
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