3 years ago

If you have 66 pencils, how many dozen do you have

1 answer:

3 0

Answer:

5.5

Explanation:

You have to do 66 divided by 12 and you get that and if you want the proof then here it is...

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LiRa [457]

Answer:

a) 3.98 x 10^-10

Explanation:

Hello,

In this case, for the given pH, we can compute the concentration of hydronium by using the following formula:

$pH=-log([H^+])$

Hence, solving for the concentration of hydronium:

$[H^+]=10^{-pH}=10^{-9.40}\\$

$[H^+]=3.98x10^{-10}M$

Therefore, answer is a) 3.98 x 10^-10

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