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Bingel [31]
3 years ago
6

Air quality is a measure of how clean or polluted the air is. Which of the following is not a common way to determine air qualit

y in an area?
A.) Measuring the acidity of the rain
B.) Measuring the amount of particulate matter
C.) Measuring the amount of ground-level ozone
D.) Measuring the amount of precipitation in the area
Chemistry
1 answer:
zhuklara [117]3 years ago
8 0

Here we have to choose the way which is not the common way to judge the quality of the air in a particular area.

The measuring the amount of precipitation in the area is not the common way to determine air quality in an area.

The acidity of the rain causes due to the excess amount of CO₂ and SO₂ in an area. Both the gases cause pollution.

The measuring of the amount of a particular gas element is a renowned way to determine the pollution level of an area.

The ozone is a harmful gas so the measuring of  its amount in ground level can identify the level of pollution in the particular area.

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Choose the FALSE statement.
Mariana [72]

Answer:

C. The half-life of C-14 is about 40,000 years.

Explanation:

The only false statement from the options is that the half-life of C-14 is 40,000yrs.

The half-life of an isotope is the time it takes for half of a radioactive material to decay to half of its original amount. C-14 has an half-life of 5730yrs. This implies that during every 5730yrs, C-14 will reduce to half of its initial amount.

  • All living organisms contain both stable C-12 and the unstable isotope of C-14
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5 0
3 years ago
Which of these solutions are basic at 25 °C? Solution A: [OH−]=3.13×10−7 M Solution C: [H3O+]=0.000747 M Solution B: [H3O+
solong [7]

Answer:

Are basic:

[OH⁻] = 3.13x10⁻⁷M and [H₃O⁺] = 9.55x10⁻⁹M

Explanation:

A solution is basic when pH = - log [H₃O⁺] is higher than 7.

It is possible to convert [OH⁻] to [H₃O⁺] using:

[H₃O⁺] = 1x10⁻¹⁴ / [OH⁻]

a. [OH⁻] = 3.13x10⁻⁷M

[H₃O⁺] = 1x10⁻¹⁴ / [3.13x10⁻⁷M]

[H₃O⁺] = 3.19x10⁻⁸M

pH = - log [H₃O⁺] = 7.50

[OH⁻] = 3.13x10⁻⁷M is basic

b. pH = -log [H₃O⁺] = - log 0.000747M = 3.13.

This solution is not basic

c. [H₃O⁺] = 9.55x10⁻⁹M

pH = 8.02

This solution is also basic.

8 0
3 years ago
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Zigmanuir [339]

Answer:atoms

Explanation:

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3) Which of the following transformations creates a figure that is similar (but not congruent) to the
kherson [118]
C is the answer Because it’s not
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3 years ago
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The sun has been up for several hours, and it has been shining on these trees. What can the trees do because they are in sunligh
Nonamiya [84]

Answer:

1. C. take in carbon from the air. The carbon is used to make energy storage

molecules.

2. b Carbon is moving into the air and out of the air at the same time

Explanation:

Question 1:

Trees are plants, which are autotrophic organisms i.e. set of organisms that are capable of producing their own food via a process called PHOTOSYNTHESIS. This photosynthetic process produces sugars (glucose) in the presence of SUNLIGHT. According to this question, the sun has been up for several hours, and has been shining on these trees. This means that the trees can take in carbo dioxide (CO2) in order to perform the process of photosynthesis. Also, the number of energy storage molecules in the trees (ATP) will INCREASE.

What can the trees do because they are in sunlight? What does this mean for the ?

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