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inysia [295]
2 years ago
6

Previously in this lesson it was mentioned that, according to some reports, in the past 35 years, world oil consumption has grow

n about 45% and continues to rise. Although crude oil, or petroleum, is a natural resource, it is nonrenewable and must undergo an expensive refining process before people can use it to power their cars. Respond to this statement by describing two potential effects of such a rise in oil consumption. Also, indicate whether or not you are confident that there will be ample alternative fuels to use if we drain the oil supply.
Chemistry
1 answer:
Ganezh [65]2 years ago
5 0
<span>First potential effects of such a rise in oil consumption.

The first and most important potential effect could be the drain of all oil, causing an effect on our lives and on the market that could be nearly catastrophic, due to the collapse of the offer that would influence nearly all sector of the economy with a downfall which consequences are impossible to foreseen but it is possible to tell they would not be pleasant.
----
</span>Second potential effects of such a rise in oil consumption. 

The second potential effects could be the fact that as oil becomes rarer and harder to get, would also get more expensive, with a repercussion on our lifestyle that would cause many people to either lose their job or not be able to afford a car or anything powered by oil. Without valid alternatives, some sectors could experience an economic crisis of great proportion. 
---
Am I confident that there will be ample alternative fuels to use if we drain the oil supply?

Yes, I am confident that there will be ample alternative fuels to use if we drain the oil supply. Solar and wind fuels are the future in the sector of energy, not only because oil is a non-renewable resource, but for climatic purpose too since oil is one of the greatest contributors to the human-made global warming that we are experiencing right now.
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2 years ago
Suppose a group of volunteers is planning to build a park near a local lake. The lake is known to contain low levels of arsenic
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A) 10.75 is the concentration of arsenic in the sample in parts per billion .

B) 7,633.66 kg the total mass of arsenic in the lake that the company have to remove.

C)It will take 1.37 years to remove all of the arsenic from the lake.

Explanation:

A) Mass of arsenic in lake water sample = 164.5 ng

The ppb is the amount of solute (in micrograms) present in kilogram of a solvent. It is also known as parts-per million.

To calculate the ppm of oxygen in sea water, we use the equation:

\text{ppb}=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 10^9

Both the masses are in grams.

We are given:

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1 ng=10^{-9} g

Volume of the sample = V = 15.3 cm^3

Density of the lake water sample ,d= 1.00 g/cm^3

Mass of sample =  M = d\times V=1.0 g/cm^3\times 15.3 cm^3=15.3 g

ppb=\frac{164.5\times 10^{-9} g}{15.3 g}\times 10^9=10.75

10.75 is the concentration of arsenic in the sample in parts per billion.

B)

Mass of arsenic in 1 cm^3  of lake water = \frac{164.5\times 10^{-9} g}{15.3}=1.075\times 10^{-8} g

Mass of arsenic in 0.710 km^3 lake water be m.

1 km^3=10^{15} cm^3

Mass of arsenic in 0.710\times 10^{15} cm^3 lake water :

m=0.710\times 10^{15}\times 1.075\times 10^{-8} g=7,633,660.130 g

1 g = 0.001 kg

7,633,660.130 g = 7,633,660.130 × 0.001 kg=7,633.660130 kg ≈ 7,633.66 kg

7,633.66 kg the total mass of arsenic in the lake that the company have to remove.

C)

Company claims that it takes 2.74 days to remove 41.90 kilogram of arsenic from lake water.

Days required to remove 1 kilogram of arsenic from the lake water :

\frac{2.74}{41.90} days

Then days required to remove 7,633.66 kg of arsenic from the lake water :

=7,633.66\times \frac{2.74}{41.90} days=499.19 days

1 year = 365 days

499.19 days = \frac{499.19}{365} years = 1.367 years\approx 1.37 years

C)

Company claims that it takes 2.74 days to remove 41.90 kilogram of arsenic from lake water.

Days required to remove 1 kilogram of arsenic from the lake water :

\frac{2.74}{41.90} days

Then days required to remove 7,633.66 kg of arsenic from the lake water :

=7,633.66\times \frac{2.74}{41.90} days=499.19 days

1 year = 365 days

499.19 days = \frac{499.19}{365} years = 1.367 years\approx 1.37 years

It will take 1.37 years to remove all of the arsenic from the lake.

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