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Phantasy [73]
3 years ago
6

Which is an example of human impact on climate changes?

Chemistry
2 answers:
sleet_krkn [62]3 years ago
7 0
C Global Warming because humans can not change the tilt of the earth or the sun. Humans are theorized to be causing global warming
Levart [38]3 years ago
3 0

Answer: Option (C) is the correct answer.

Explanation:

When a steady change, that is, increase in temperature occurs which causes melting of ice sheets, glaciers etc is known as global warming.

Humans are also responsible for increase in global warming as increased use of vehicles cause pollution, also smoke from the industries, factories, chimneys in the household all these cause an increase in temperature of Earth which leads to global warming.

Thus, we can conclude that global warming is an example of human impact on climate changes.

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An ionic compound has a very negative heat of solution in water. Would you expect it to be soluble or insoluble in water?.
ddd [48]

Answer:

It will be Insolube in water

8 0
2 years ago
Which of the following is the correct chemical formula for Ca and F? CaF Ca2F CaF2
yawa3891 [41]

Answer:

CaF2

Explanation:

Calcium fluoride is a solid formed by the chemical combination of Calcium (Ca) and Fluorine (F). Two molecules of fluorine (F2) and one molecule of Calcium (Ca) are needed to form the Calcium Fluoride molecule.

An ionic bond is formed between the Calcium and Fluorine atoms i.e. electrons are transferred from calcium atoms to fluorine atoms. The calcium ion is a cation with formula; Ca2+ while fluorine is an anion with formula; F-. Hence, it takes two molecules of Fluorine ion (F-) to form a relatively stable and neutral molecule with 1 molecule of Calcium ion (Ca2+).

4 0
3 years ago
What is the freezing point of a solution of 0.5 mol of LiBr in 500 mL of water? (Kf = 1.86°C/m) –1.86°C –7.44°C –5.58°C –3.72°C
tresset_1 [31]

Answer:

  • Last choice: <em><u>- 3.72°C</u></em>

Explanation:

The freezing point depression in a solvent is a colligative property: it depends on the number of solute particles.

The equation to predict the freezing point depression in a solvent is:

  • ΔTf = Kf × m × i

Where,

  • ΔTf is the freezing point depression of the solvent,
  • m is the molality,
  • Kf is the cryoscopic molal constant of the solvent, and i is the Van'f Hoff factor, which is the number of ions produced by each unit formula of the ionic compound.

The calcualtions are in the attached pdf file. Please, open it by clicking on the image of the file.

Download pdf
6 0
3 years ago
1. To form a solution, ________.
adoni [48]
1.one substance must dissolve another : the solvent breaks the the solute causing it to dissociate into the solvent it can be both solids or gases that dissolve in the solute

2.the melting point will be higher than 100 degrees as the salt causes the solution to gain a higher melting point

3.either released or absorbed : energy is required to dissolve the solute but the solute may also release energy

4.the salt dissolved most quickly in the warm water : as there is more energy for the solute to dissolve 

hope that helps 
3 0
3 years ago
Read 2 more answers
Which answer helps to explain why carbon atoms tend to make 4 covalent bonds? which answer helps to explain why carbon atoms ten
Kay [80]

Carbon-12 has the following electron configuration: 1s2-2s2-2p2. As seen in the configuration, the right answer is: the first electron shell has 4 orbitals.


8 0
3 years ago
Read 2 more answers
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