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iren [92.7K]
3 years ago
13

Beginning with an explanation of gravity's effect on a nebula, explain how we humans owe our existence to gravity.

Chemistry
1 answer:
Dafna1 [17]3 years ago
3 0

When nebulae collapses due to their own weight, this is due to gravity. The gravity causes atoms to fuse and a protostar is born from the fusion of hydrogen. Fusion of hydrogen forms heavier elements such as helium and more fusion of helium forms carbon. Carbon is the significant element of life and is formed in the center of stars due to nuclear fusion as a result of gravitational force.

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Can you identify how an animals adoption allows it to survive in its habit
dsp73
Animals adapt to their needs and the things they need to do or to have in order to survive. The Galapagos Finch has different beak sizes in order to eat larger nuts or seeds. 
4 0
3 years ago
A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 417 pm. The diameter of the metal atom is:
enyata [817]

Answer:

b. 295 pm

Explanation:

To answer this question we need to use the equation of a face-centered cubic laticce:

Edge length = √8 R

<em>Where R is radius of the atom.</em>

<em />

Replacing:

417pm = √8 R

R = 147.4pm is the radius of the atom

As diameter = 2 radius.

Diameter of the metal atom is:

147.4pm* 2 =

295pm

Right answer is:

<h3>b. 295 pm </h3>

8 0
3 years ago
True or False: A heterozygous genotype produces the dominant phenotype because the dominant allele masks the recessive allele.
jasenka [17]
This is true! Heterozygous would be Dd, and the dominant masks the recessive
4 0
3 years ago
Based on the Periodic Table, explain why Na and Khave similar chemical properties
sasho [114]
The Group 1 elements, which include lithium (Li), sodium<span> (</span>Na) and potassium (K<span>) are also known as the alkali metals. They all </span>have<span> one electron in the outer shell and so they </span>have similar properties<span>.</span>
3 0
3 years ago
When a certain powder is mixed into a solution of silver nitrate, a white precipitate forms. When the powder is added to a solut
atroni [7]

Answer:

Ammonium chloride

Explanation:

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When mixed with silver nitrate, white prescipitate of silver chloride is formed as:-

NH_4Cl+AgNO_3\rightarrow NH_4NO_3+AgCl

When mixed with sodium hydroxide, ammonia gas is formed which has noxious order.

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Ammonia gas on reaction with nickel (II) hydroxide forms deep blue colored complex as shown below:-

Ni(OH)_2(s) + 6NH_3(aq)\rightarrow [Ni(NH_3)_6]^{2+}(aq) + 2OH^{-}(aq)

5 0
3 years ago
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