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Alisiya [41]
3 years ago
15

Cuántos electrones contiene el átomo de helio​

Chemistry
1 answer:
Deffense [45]3 years ago
4 0

Answer: 2:Dos

Explanation:

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Which statement describes one characteristic of an operating electrolytic cell?
Svet_ta [14]
The answer is (2). The electrolytic cell mechanism is to convert the electrical energy to chemical energy. So it need external energy source. And there is a similar one called voltaic cell which will convert the chemical energy to electrical energy.
4 0
3 years ago
What is the relationship between the number of carbon atoms in hydrocarbon at its boiling point ?
saveliy_v [14]
  • If no of carbon atoms be C
  • Boiling point of compound be BP

So

\\ \tt\longmapsto C\propto BP

  • No of carbon atoms is directly proportional to the boiling point of the compound.
  • If no of carbon atoms increases in a hydrocarbon the length of carbon chain also increases and all carbons get wrapped around themselves.
  • Which causes increase in boiling point of compound.

Look the table below for the boiling points of some alkanes

\boxed{\begin{array}{c|c}\boxed{\bf Alkane}&\boxed{\bf Boiling point}\\ \sf CH_4&\sf -164°C \\ \sf C_2H_6 &\sf -88.6°C \\ \sf C_3H_8&\sf 42.1°C \\ \sf C_4H_{10} &\sf -0.5°C \\ \sf C_5H_{12} &\sf 36.1°C \\ \sf C_6H_{14} &\sf 68.9°C \\ \sf C_7H_{16} &\sf 98.4°C \\ \sf C_8H_{18} &\sf 125.7°C \\ \sf C_9H_{20} &\sf 150.4°C \\ \sf C_{10}H_{22} &\sf 150.7°C \end{array}}

8 0
2 years ago
What happens to an earthquake’s p-waves when they strike the liquid core?
padilas [110]

Answer:

They bounce off.

Explanation:

They change into S-waves. They change into R-waves.

6 0
4 years ago
What did James Cameron use on his 2nd visit to this famous ship to look inside?
AURORKA [14]

Answer:

beneath the surface of the Pacific Ocean comes from samples and video collected by an unmanned lander,

7 0
2 years ago
.250 moles of H2O to molecules
ivolga24 [154]

Answer:

1.51 × 10²³ molecules

Explanation:

Given data:

Number of moles of water = 0.250 mol

Number of molecules of water = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

1 mole = 6.022 × 10²³ molecules of water

0.250 mol × 6.022 × 10²³ molecules / 1 mol

1.51 × 10²³ molecules

8 0
3 years ago
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