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motikmotik
3 years ago
13

Why does Watney get left behind on Mars?

Chemistry
2 answers:
OlgaM077 [116]3 years ago
8 0

Answer:

I think it's because he was presumed dead after a storm, or like a problem with his suit

Charra [1.4K]3 years ago
4 0

Explanation: I think it was because somebody thought he was dead in the storm? And the remaining of the crew were forced to leave him behind thinking he was dead on mars.

I might be right, might not ^^

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Prompt 2 - You are watching the Indy 500 car race on television with your brother. He says, "Did you know that
Alekssandra [29.7K]

Answer:

500

Explanation:

from the average and if yoy multiple and then add your % and x you would get 500 to 600

8 0
2 years ago
Which two characteristics describe all animals
Maru [420]

All animals can be dangerous and they would fight for their family. (This might be wrong)

5 0
3 years ago
Which type of reaction has the general formula of AB+CD -> AD+CB ?
ruslelena [56]
<span>Double displacement reaction is your answer.</span>
7 0
3 years ago
The elements in which electrons are progressively filled in 4f-orbital are called.
Y_Kistochka [10]

The elements in which electrons are progressively filled in 4f-orbital are called lanthanoids.

There are 15 metallic chemical elements called lanthanoids.

Those elements are with atomic numbers from 57 to 71.

Lanthanoids belong to f-block elements because of the filling of the 4f-orbitals.

One of the lanthanoids, lutetium (chemical symbol Lu) has 14 electrons if 4f orbitals.

Electron configuration of lutetium: [Xe] 4f14 5d1 6s2

f-orbitals are similar to the d orbital, but cut in half (eight lobes instead of four).

Lanthanoids are used not as materials in catalysts, alloys, lasers and cathode-ray tubes.

More info about lanthanoids: brainly.com/question/24413965

#SPJ4

5 0
1 year ago
A lithium flame has a characteristic red color due to emissions of wavelength 671 nm. What is the mass equivalence of 1 mol of p
e-lub [12.9K]

Answer:

1.98x10⁻¹² kg

Explanation:

The <em>energy of a photon</em> is given by:

  • E= hc/λ

h is Planck's constant, 6.626x10⁻³⁴ J·s

c is the speed of light, 3x10⁸ m/s

and λ is the wavelenght, 671 nm (or 6.71x10⁻⁷m)

  • E = 6.626x10⁻³⁴ J·s * 3x10⁸ m/s ÷ 6.71x10⁻⁷m = 2.96x10⁻¹⁹ J

Now we multiply that value by <em>Avogadro's number</em>, to <u>calculate the energy of 1 mol of such protons</u>:

  • 1 mol =  6.023x10²³ photons
  • 2.96x10⁻¹⁹ J *  6.023x10²³ = 1.78x10⁵ J

Finally we <u>calculate the mass equivalence</u> using the equation:

  • E=m*c²
  • m=E/c²
  • m =  1.78x10⁵ J / (3x10⁸ m/s)² = 1.98x10⁻¹² kg

6 0
3 years ago
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