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Bas_tet [7]
2 years ago
15

Which option is an example of a chemical change?

Chemistry
1 answer:
MA_775_DIABLO [31]2 years ago
6 0
Firework exploding. Thank you :)
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Look at the diagram. Which shows the correct arrangement of electrons in water?
mariarad [96]

Answer:

Option 4

Explanation:

In water molecule, oxygen has -2 charge on it while the hydrogen has +1 charge and one atom of oxygen combines with two hydrogen atoms. A hydrogen need only two electrons to complete its octet (one electron is its own the second electron is shared by oxygen) and a oxygen needs 8 electrons (It has six of its own and two are shared by two hydrogen atom).

Hence, option 4 is correct

6 0
2 years ago
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An astronaut has a mass of 60kg. Calculate their weight When they are on the surface of the moon.
IceJOKER [234]

Answer:

I think 0kg because they are flying.

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Explain surface tension and capillary action
Andreas93 [3]

Adhesion of water to the surface of a material will cause an upward force on the liquid. The surface tension acts to hold the surface intact. Capillary action occurs when the adhesion to the surface material is stronger than the cohesive forces between the water molecules.

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3 years ago
Earnest Rutherford discovered that the nucleus is this
Nikitich [7]
Rutherford, through his gold-foil experiment, discovered that the nucleus is a small core of protons and neutrons making up most of the atom’s mass.
8 0
3 years ago
Read the chemical equation.
love history [14]

Answer:

A 2.8 liters

Explanation:

Step 1: Write the balanced equation

N₂ + 3 H₂ ⇄ 2 NH₃

Step 2: Establish the appropriate volume ratio

At the same temperature and pressure, the volume ratio of H₂ to NH₃ is 3:2.

Step 3: Calculate the volume of ammonia produced from 4.2 L of hydrogen

4.2 L H₂ × 2 L NH₃/3 L H₂ = 2.8 L

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2 years ago
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