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Mama L [17]
3 years ago
12

There are many sources of air pollution in the united states and around the world. Some are natural sources, and other come from

human activities. Which of these examples is a natural source of air pollution?
A.) car exhaust fumes
B.) methane gas from cow manure
C.) dust from fertilizers used on crops
D.) smoke from the burning of fossil fuels
Chemistry
1 answer:
KATRIN_1 [288]3 years ago
4 0
B should be your best guess
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Atomic mass number of first 30 elements
dangina [55]

Answer:

Element Atomic Number Atomic Mass

Nickel          27                          58.6934

Cobalt             28                   58.9332

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Zinc                   30                            65.39

Explanation:

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Find the mass of an object that has a density of 1.5 g/cm3 and has a volume of 8cm3
zubka84 [21]

Answer:

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3 years ago
Use a sheet of paper to answer the following question. Take a picture of your answers and attach to this assignment. Draw the st
pentagon [3]

Answer:

Explanation:

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In 2,2,4,4-tetramethyl-3-pentanone, no alpha hydrogen is present, therefore, enol form is not possible and hence, exist only in keto form.

Explanation for existence of cyclohexa-2,4-diene-1-one only in enol form:

keto form of cyclohexa-2,4-diene-1-one not aromatic and hence less stable.

Whereas enol form it is aromatic which makes it highly stable. that's why cyclohexa-2,4-diene-1-one exists only in enol form.

8 0
3 years ago
Chemistry screen shot below plzzzzzzz help i've been stuck forever
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Answer:

True

Explanation: Imagine the Electrons is by the nucleus which give more energy.

8 0
3 years ago
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