What quantity is a scalar quantity?

1 answer:

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Answer:

A scalar quantity is a quantity that includes both magnitude (the number) and a unit, but not direction.

An example of this is 5m.

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One liter of a solution ph 9 has how many more hydroxide ions (oh-) than 1 l of a solution of ph 4?

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<span>100,000 times more. The rule is that the product of the concentration of (H+) and (OH-) in molars is always 10^-14 (if it is more, they combine and produce simple water which brings the product back down to this number again. If it is less, water molecules will split to bring the product back up to equilibrium).
pH 9 means (H+) is 10^-9 molar. But that means (OH-) is 10^-5 at the same time.
pH 4 means (H+) is 10^-4 molar. But that means (OH-) is 10^-10 at the same time.
10^-5 / 10^-10 = 10^5 or 100,000 times more.</span>

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The answer is somewhat acidic

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What happens when an atom gains an electron

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It becomes charged and is called an ion. Gaining an electron gives it a negative charge.

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