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Snowcat [4.5K]
3 years ago
6

The Theory of Plate Tectonics states that the Earth’s surface is divided into large sections called the _____________. (This is

a project, there aren't any answer choices.)
Chemistry
1 answer:
Goshia [24]3 years ago
5 0

The answer is ; Tectonic plates

The plates sit above the ‘plastic’ mantle and move due to the convection currents in the underlying mantle. There are approximately 7 major tectonic plates of the lithosphere. Where some of these plates collide is called a convergence/ destructive boundary while where they move away from each other is called a divergent/constructive boundary.  


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How many atoms of nitrogen and oxygen are present in a molecule of dinitrogen pentoxide?
Kitty [74]

Answer: 7

Explanation: oxygen has 5 atoms and nitrogen has 2. Put them together and you get 7

6 0
3 years ago
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Why Formaldehyde is more reactive than Acetaldehyde?
tatyana61 [14]
Aldehydes are usually more reactive<span> toward nucleophilic substitutions </span>than<span> ketones because of both steric and electronic effects. In aldehydes, the relatively small hydrogen atom is attached to one side of the carbonyl group, while a larger R group is affixed to the other side.</span>
7 0
3 years ago
Which of the following electronic transitions would emit the lowest energy photon?
anyanavicka [17]

Answer:

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7 0
3 years ago
Magnesium sulfate heptahydrate is heated until all the water is driven off. The sample loses 11.80 grams upon heating. What was
iren [92.7K]
Hello!

The initial mass of Magnesium Sulfate Heptahydrate (MgSO₄·7H₂O) is 23,08 g

The chemical reaction for the dehydrating of Magnesium Sulfate Heptahydrate (MgSO₄·7H₂O) is the following:

MgSO₄·7H₂O(s) + Δ → MgSO₄(s) + 7H₂O(g)

We know that the sample loses 11,80 g upon heating. That mass is the mass of Water that is released as vapor. Knowing that piece of information, we can apply the following conversion factor to go from the mass of water to the moles of water and back to the mass of the original compound (mi).

mi=11,80gH_2O* \frac{1 mol H_2O}{18gH_2O}* \frac{1molMgSO_4.7H_2O}{7molH_2O}* \frac{246,47 g MgSO_4.7H_2O}{1 mol MgSO_4.7H_2O}  \\  \\ mi=23,08gMgSO_4.7H_2O

Have a nice day!

6 0
3 years ago
Why must there be two chlorine atoms for every one calcium atom
Nady [450]

Answer:

There must be two Chlorine atoms for every one Calcium atom in order to fulfill Chlorine's octet rule and pair Calcium's unpaired electrons.

Explanation:

Calcium has two unpaired electrons in its Lewis dot structure, while Chlorine has one unpaired electron.

<em>So why can't we just make a double bond for </em><em>one</em><em> Chlorine?</em>

Chlorine has seven valence electrons, so once it shares electrons with Calcium, the octet rule is accomplished, and no more pairs can be made.

4 0
4 years ago
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