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Korvikt [17]
3 years ago
5

Why are the earthquakes & volcanoes located where they are? Why aren't they randomly spread out across the earth?

Chemistry
1 answer:
In-s [12.5K]3 years ago
5 0

Answer: They tend to occur along limited zones or belt

Explanation:

As the plates move, their boundaries collide, spread apart or slide past one another, resulting in geological processes such as earthquakes, volcanoes and mountain making.

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3. Give three examples of a pure substances
Nadya [2.5K]

Answer:

There will be weight, there will be volume, there will be height

Explanation:

5 0
3 years ago
Read 2 more answers
Draw structures from the following names, and determine which compounds are optically active:(c) 1,2-dibromo-2-methylbutane
dolphi86 [110]

The given compound 1,2-dibromo-2-methylbutane is an optically active compound .

Because this compound does not have plane of symmetry (POS) and center  of symmetry (COS) i.e. does not have di-symmetry . And also forms non superimposable mirror image . the compound is optically active .

It has  chiral center.

Here , the chiral carbon is attached to the 4 distinct groups such as :  methyl , ethyl , bromine , bromomethane .

<h3>What is di-symmetry?</h3>

Di-symmetry is that which have no center of symmetry and plane of symmetry and alternate axis of symmetry .

<h3>Chiral center :</h3>

Have Sp3 hybridized center (4sigma bond ) .

4 distinct group  is attached to the chiral atom. form non -superimposable mirror image .

<h3>What is optical isomerism ?</h3>

Same molecular formula and same structural formula . also have same physical and chemical properties .

They differ in their behavior towards plane polarized light (ppl) .

Learn more about chiral center here:

brainly.com/question/9522537

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8 0
2 years ago
Help me answer these questions
kompoz [17]
For the first one I think it’s A, and I think the second one is C. Those seem most logical.
8 0
3 years ago
Read 2 more answers
Which would you expect sound to have the greatest speed, 20liter container with 5000 molecules or the 20 liter container with 10
AnnZ [28]
1000 because of less molecules

3 0
3 years ago
The unbalanced equation below shows the reaction between sodium and water. In the reaction,
NISA [10]

Answer:

41.4 g

Explanation:

2Na(s) + 2H2O (l) ----> 2NaOH ( aq) + H2 (g)

According to the above balnced chemical equation the ratio between moles of H2 gas formed to moles of Na used up is 1:2

Molar mass ( Mass of 1 mol) Of H2 gas is 2 gmol-1

So in 1.8 g of H2 0.9 mol should be present

Therefore no. of moles of Na used should be 2× 0.9 = 1.8 moles

Molar mass of Na= 23 gmol-1

So mass of 1.8 mol of Na = 1.8× 23 g = 41.4g

5 0
2 years ago
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