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aalyn [17]
3 years ago
13

The geological time scale divides the history of Earth into blocks of time known as eras, epochs, periods, and eons. We are curr

ently living in the Holocene epoch, a period that began after the last major ice age, but some scientists believe we have entered a new epoch. The Anthropocene is a proposed epoch that would begin when human activity first started to significantly affect Earth. Supporters of this proposed epoch argue that human activity has caused large changes to the geology and diversity of organisms of Earth, so this period should be documented in the geological time scale. What do you think? Should human activity should be documented on the geological scale? Why or why not? If the human population were not the size it was today, how would Earth be different? Consider all four spheres—geosphere, atmosphere, hydrosphere, and biosphere—in your answer.
Chemistry
2 answers:
Brut [27]3 years ago
8 0
Yes, humans have done more damage to the earth than any natural catastrophe. Civilization have ended. The earth has the ability to renew itself time and time again by it's own natural 4 powers. Do we?
Andrej [43]3 years ago
5 0

I think the period of human presence on the Earth should not be documented on the geological time scale. Although humans have caused an enormous change in the Earth, this has actually been done over an extremely short period of time. Modern humans appeared roughly 0.8-0.3 million years ago. Civilization appeared roughly 5,000 years ago. However, significant damage and alteration to the geology and the diversity of organisms has only happened in the last few centuries.

If human population were not the size that it is today, the differences would be massive. Agriculture and animal husbandry would be practiced in a much smaller scale. This would allow many ecosystems to remain intact. Moreover, the pollution and garbage that we create would be reduced. Finally, with a reduction in population, living standards tend to rise, as well as education. More educated people would probably mean more environmentally conscious individuals.

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How many grams are in 1.70 moles of Ca(NO3)2?
Andru [333]

The number of grams in 1.70 moles of Ca(NO₃)₂ is 384.2 grams

<h3>How to determine the mass of Ca(NO₃)₂</h3>

The mole of a substance is related to it's mass and molar mass according to the following equation:

Mole = mass / molar mass

With the above formula, we can determine the mass of Ca(NO₃)₂ as illustrated below:

  • Mole of Ca(NO₃)₂ = 1.70 moles
  • Molar mass of Ca(NO₃)₂ = 40 + 3[14 + (16 × 3)] = 40 + 3[14 + 48] = 40 + 3(62) = 40 + 186 = 226 g/mol
  • Mass of Ca(NO₃)₂ = ?

Mole = mass / molar mass

1.70 = Mass of Ca(NO₃)₂ / 226

Cross multiply

Mass of Ca(NO₃)₂ = 1.70 × 226

Mass of Ca(NO₃)₂ = 384.2 grams

Thus, the mass of 1.70 moles of Ca(NO₃)₂ is 384.2 grams

Learn more about mole:

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#SPJ1

4 0
1 year ago
What coefficients are needed to balance the equation for the complete combustion of methane? enter the coefficients in the order
Art [367]

The coefficients in the order CH₄, O₂, CO₂, and H₂O, are 1,2,1,2

The equation becomes:

CH₄ (g) + 2O₂ (g) -> CO₂ (g) + 2H₂0 (g)

<h3><em>Further explanation</em></h3>

Complete combustion of hydrocarbon with oxygen will be obtained by CO₂ and H₂O compounds.

If O is insufficient there will be incomplete combustion produced by CO and H and O

Hydrocarbon combustion reactions (specifically alkanes)

\large {\boxed {\bold {C_nH _ (_2_n _ + _ 2_) + \frac {3n + 1} {2} O_2 ----> nCO_2 + (n + 1) H_2O}}}

Equalization of chemical reaction equations can be done using variables.

Steps in equalizing the reaction equation:

  • 1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c etc.
  • 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index between reactant and product
  • 3. Select the coefficient of the substance with the most complex chemical formula equal to 1

For gas combustion reaction which is a reaction of hydrocarbons with oxygen produces CO₂ and H₂O (water vapor). can use steps:

Balancing C atoms, H and last atoms O atoms

Methana combustion reaction

CH₄ (g) + O₂ (g) -> CO₂ (g) + H₂0 (g)

We give the most complex compounds, namely Methane, we give the number 1

So the reaction becomes

CH₄ (g) + aO₂ (g) -> bCO₂ (g) + cH₂0 (g)

C atom on the left 1, right b, so b = 1

H atom on the left 4, right 2c, so 2c = 4 ---> c = 2

Atom O on the left 2a, right 2b + c, so 2a = 2b + c

2a = 2.1 + 2

2a = 4

a = 2

The equation becomes:

CH₄ (g) + 2O₂ (g) -> CO₂ (g) + 2H₂0 (g)

<h3><em>Learn more</em></h3>

the combustion of octane in gasoline

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hydrogen and excess oxygen

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Keywords: methane, combustion, hydrocarbons, equalization of reaction equations

3 0
4 years ago
Read 2 more answers
What happens to an electromagnetic wave as the
Vesnalui [34]

Answer:

Energy decreases and wavelength gets longer.

Explanation:

The energy of a wave is given by :

E=hf

Where

h is Planck's constant

f is the frequency of the wave

As frequency decreases, the energy of the wave also decreases and wavelength gets longer. Hence, the option is (d).  

6 0
3 years ago
Study the solutions in the glasses. Put the solutions in order from concentrated to dilute.
BaLLatris [955]
I thank it is b the correct answer
4 0
3 years ago
The elements sodium and chlorine
Olegator [25]

Answer:

combining chemically

Explanation:

this is because theres tranfer of electron from Na to Cl by chemical reaction

7 0
3 years ago
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