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Dmitry_Shevchenko [17]
3 years ago
5

It get hotter towards the center

Chemistry
1 answer:
STatiana [176]3 years ago
8 0

Answer:

earth

Explanation:

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Please please help me i’m so confused! i will give brainleiest answer
pochemuha

Answer:

PLEASE MARK AS BRAINLIEST!!

Explanation:

Calcium has an atomic number of 20 and an atomic mass of 40

The mass number of an isotope is the sum of the number of protons and neutrons in the atomic nucleus. The atomic number is the number of protons. The calcium-40 isotope has a mass number of 40 , and an atomic number of 20 , therefore it has 20 protons.

7 0
3 years ago
Match each alkane names and structures.
Scilla [17]

First structure is  CH₃-CH₃. It is an alkane with two carbon atoms hence it is called ethane.

Second structure is  CH₃-CH₂-CH₂-CH₃. It is an alkane with four carbon atoms hence it is called butane.

Third structure is CH₄. It is an alkane with one carbon atom hence it is called methane.

Fourth structure is CH₃-CH₂-CH₃. It is an alkane with three carbon atoms hence it is called propane.


6 0
3 years ago
Theoretically, which nonmetal should be the most reactive?<br> <br> He<br> Rn<br> F<br> At
mariarad [96]
I would think radon would be the most reactive.
3 0
3 years ago
Read 2 more answers
Which subatomic particle accounts for magnetism ?
Natalija [7]

Answer:

Each atom has electrons, particles that carry electric charges. Spinning like tops, the electrons circle the nucleus, or core, of an atom. Their movement generates an electric current and causes each electron to act like a microscopic magnet

Explanation:

trust me

4 0
2 years ago
Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. Th
Vlada [557]

Answer:

the mass required to inflate a 72 L bag is 191.491 g

Explanation:

reaction:

  • 2 NaN3 ↔ 2 Na + 3 N2

conditions:

  • V = 72.0 L
  • STP: P = 1 atm  ∧ T = 298 K

gas law:

  • PV = RTn
  • R = 0.082 atm * L / K * mol

⇒ n = PV / RT

⇒ n = ((1 atm) * ( 72.0 L)) / (0.082 atm*L / K*mol) * (298 K)

⇒ n = 2.946 mol

⇒ m = n * Mw = ( 2.946 mol ) * ( 64.99 g/mol)

⇒ m = 191.491 g

7 0
3 years ago
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