COPERNICUS WHO WAS IT

1 answer:

mote1985 [20]3 years ago

4 0

Nicolaus Copernicus was a Polish astronomer who put forth the theory that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun. This is called the heliocentric, or Sun-centered, system.

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When water is decomposed into hydrogen and oxygen, these gases cannot combine again to reform water?

Semenov [28]

This statement is false. When water is decomposed into hydrogen and oxygen; these gases are in a position of combining again to reform water. Water is a molecule consisting of one atom of oxygen bound to two hydrogen atoms. The atoms are joined by covalent bonds; however they have addition hydrogen bonds between the partial negative oxygen and the partial positive hydrogen atom.

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4 years ago

Which choice confirms that one air mass is being replaced by another air mass in a given area?

Sedaia [141]

Answer:

Answer is A

Explanation:

Increase in wind

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3 years ago

Compound decomposes through the following unbalanced reaction in acidic media: MnO2→ MnO4-(s) + Mn2+(s) Balance this reaction an

choli [55]

Answer:

C) MnO₂

Explanation:

If we write the semi equations (this is, for reduction and oxidation) we will have:

Oxidation: 2MnO₂ → MnO₄⁻ + Mn⁺²

Reduction: 2H₂O → H₂ + 2OH⁻

Then the final global reaction (just adding the two above hemi chemical reactions):

2MnO₂ + 2H₂O → MnO⁻₄ + Mn⁺² + H₂ + 2OH⁻ (in acidic media)

So, we have Mn⁺⁴ (from MnO₂) goes to Mn⁺⁷ and Mn⁺² (this is, Mn is oxidated) and H⁺ (from acidic media or H₂O) goes to H₂ (this is, it is reduced). So the reducing agent would be MnO₂

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4 years ago

The measurement 4.06 x 10^-5g represents:

Hitman42 [59]

The measurement 4.06 x 10^-5g represents: 0.0000406 g

8 0

4 years ago

Read 2 more answers

Select the phrase that completes each statement. • Honey is . • Grape juice is • Sand on the beach is . • A mixture of carbon di

Harman [31]

Answer:

a mixture and solution

• a mixture and a solution

• a mixture but not a solution

• a mixture and a solution

• mixture and a solution

Explanation:

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4 years ago