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Mademuasel [1]
3 years ago
5

When you are balancing chemical reactions (equations'), what must you never touch?

Chemistry
1 answer:
Minchanka [31]3 years ago
4 0

The correct answer option is: the number in subscript.

When you are balancing any chemical equation, you must never touch or change the number in subscript of the molecule of a chemical or compound as it will upset the composition.

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When the number of electrons in an atom changes, then the atom's_______ change.
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Answer:

It would change the charge of the atom.

Explanation:

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Neptune is 30 AU (astronomical units) from the sun. How long, in light minutes, would it take for light from the sun to reach Ne
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Answer:

250 light minutes takes

Explanation:

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The light travels at the speed of 3.0x10⁸m/s. That means in 1 second, travels 3.0x10⁸m. To solve this question we must find the distance of neptune to the sun in meters. In this way we can find the seconds (And minutes) that need the light to travel from the sun to neptune:

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<em>Time transcurred:</em>

4.5x10¹²m * (1s / 3.0x10⁸m) = 15000s

15000s * (1min / 60s) =

<h3>250 light minutes takes</h3>

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