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3 years ago

The acidity of normal rain water is due to ______. a) SO2 b) CO2 c) NO2 d) NO

Chemistry

2 answers:

Viktor [21]3 years ago

6 0

The correct answer choice is CO₂ (B)

Rainwater naturally contains acids derived from carbon dioxide in the air and reacts with water vapor to form weak acids

H₂O + CO₂ ---> H₂CO₃

<h3>Further Explanation</h3>

Rainwater can cause damage to buildings, animals or plants due to acid rain

Acid rain occurs because other gases in the air mix with toxic gases to form acids

Rainwater naturally contains acids derived from carbon dioxide in the air and reacts with water vapor to form weak acids

H₂O + CO₂ ---> H₂CO₃

However, due to exhaust gases from industry, motor vehicles, or power plants that use fossil fuels containing sulfur to produce sulfur dioxide gas which will produce sulfuric acid

Sulfur combustion from fossil fuels

S + O₂ ----> SO₂

SO₂ produced from this exhaust gas reacts with O₂ oxygen which oxidizes SO₂ to SO₃

SO₂ + O₂ ----> SO₃

SO3 formed reacts with water vapor in the air to produce sulfuric acid as acid rain

SO₃ + H₂O ---> H₂SO₄

To reduce the pollution from this fossil fuel, various studies are now carried out as substitute energy that is more environmentally friendly such as solar energy and so on

<h3>Learn more </h3>

Acid rain is a secondary pollutant

brainly.com/question/1324440

The impact of from acid rain

brainly.com/question/8208861

Air pollution

brainly.com/question/1232950

Keywords: acid rain, air pollution, SO₃, H₂SO₄, fossil fuel

Gemiola [76]3 years ago

6 0

Answer:

SO₂

Explanation:

Acid rain is due to SO₂.

SO₂ + ½ O₂ + H2O = H₂SO₄

H₂SO₄= 2H⁺ + SO₄²⁻

Harmful pollutant in the air such as sulfur dioxide creates acid rain. SO₂ reacts with water vapor and oxygen to form sulfuric acid, which makes the rain acidic. H₂SO₄ releases H⁺ which decreases the pH of rain water. At acidic pH rainwater is harmful to both living beings and architectural objects.

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Which is a pure substance? soda gasoline salt water carbon dioxide

hram777 [196]

Answer: Carbon dioxide is a pure substance.

Explanation: A pure substance is defined when a substance has a single type of molecule. If more than 1 type of molecule is present in a substance, then it is considered as a mixture.

Soda is basically a mixture of water and carbon dioxide. More than 1 type of molecule is present.

Gasoline is a mixture of may gases. More than 1 type of molecule is present.

Salt water contains salt and water molecules, hence it is considered as a mixture.

Carbon dioxide has only 1 type of molecule which is $CO_2$ molecules. Hence, it is a pure substance.

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2 years ago

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If the half-life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds? A. one-fourth B.

Basile [38]

$m=m_{0}*(\frac{1}{2})^{\frac{60}{30}}\\\\
m=m_{0}*(\frac{1}{2})^{2}\\\\
m=\frac{1}{4}m_{0}$

If the half-life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds? A. one-fourth

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2 years ago

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Amphetamine (C9H13N)(C9H13N) is a weak base with a pKbpKb of 4.2. You may want to reference (Pages 710 - 713) Section 16.8 while

Soloha48 [4]

Answer:

pH = 10.38

Explanation:

C9H13N ↔ C9H20O3N+ + OH-

∴ molar mass C9H13N = 135.21 g/mol

∴ pKb = - log Kb = 4.2

⇒ Kb = 6.309 E-5 = [OH-][C9H20O3N+] / [C9H13N]

∴ C sln = (205 mg/L )*(g/1000 mg)*(mol/135.21 g) = 1.516 E-3 M

mass balance:

⇒ C sln = 1.516 E-3 = [C9H20O3N+] + [C9H13N]......(1)

charge balance:

⇒ [C9H20O3N+] + [H3O+] = [OH-]; [H3O+] is neglected, come from water

⇒ [C9H20O3N+] = [OH-].......(2)

(2) in (1):

⇒ [C9H13N] = 1.516 E-3 - [OH-]

replacing in Kb:

⇒ Kb = 6.3096 E-5 = [OH-]² / (1.516 E-3 - [OH-])

⇒ [OH-]² + 6.3096 E-5[OH] - 7.26613 E-8 = 0

⇒ [OH-] = 2.3985 E-4 M

∴ pOH = - Log [OH-]

⇒ pOH = 3.62

⇒ pH = 14 - pOH = 14 - 3.62 = 10.38

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2 years ago

Question 20 (3 points) Why is the moon visible? Question 20 options: It is on fire. It reflects sunlight. Earth lights it up. It

alexgriva [62]

20. Answer is "it reflects sunlight".

The moon is not a star as sun. Hence, moon can't produce light by itself. The only reason that we can see the moon is it reflects the sunlight. According to the distance from the sun to the moon, the light reflection can be varied.

21. Answer is "Jupiter".

Asteroid belt is a region which is located between Mars and Jupiter and consists of asteroids and minor planets. This asteroid belt has the 4% as the mass of our moon. Due to the Jupiter's strong gravity, it is prevented a forming of new planet by this asteroid belt.

22. Answer is "they are equal".

The period of revolution is the time which is taken by a mass to go completely one round around another mass. For moon, the period of revolution is 27 days.
The period of rotation is the time taken by a mass to complete one round around its own axis. It is about 27 days for moon.

23. Answer is "The moon is in Earth's shadow".

Lunar eclipse happens when Sun, Earth and moon are directly aligned each other and Earth is located in between the Sun and the moon. Then the moon is covered by the Earth's shadow.

24. Answer is "In a solar eclipse, it is Earth that is caught in the umbra of the moon. In a lunar eclipse, it is the moon that is caught in the umbra of Earth".

In total lunar eclipse, Earth is located between Sun and the moon and they are directly aligned to each other. The moon is totally covered with the Earth's shadow.
Total solar eclipse can be seen when the moon is located between sun and Earth by completely covering the sun.

25. According to the given choices, we can get "Apollo" as the answer.

Apollo 8 is the first manned mission to the moon. From that there were several manned mission including first manned landing on the moon. The Apollo program was conducted by USA.

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3 years ago

The most abundant elements in the universe are hydrogen and helium, but there are also small but significant amounts of heavier

Stells [14]

Answer:

in nuclear fusion deep in the interiors of stars

Explanation:

Nuclear fusion -

It is the type of reaction , where two or more atomic nuclei of the atom merges together to release two or more different nuclei along with some subatomic particles , is referred to as a nuclear fusion reaction .

The reaction can very well be done on stars , because of very high energy .

Hence , a nuclear fusion occurs deep inside the stars .

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2 years ago