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IrinaVladis [17]
3 years ago
15

The hydrogen ion concentration (h+) in a certain cleaning compound is (h+)=3.2x10^-11 use the formula ph=-log(h+) to find the pH

of the clean compound the pH is approximately
Mathematics
1 answer:
Furkat [3]3 years ago
6 0

Answer:

The pH of the clean compound is approximately 10.495.

Step-by-step explanation:

If the cleaning ion concentration of the cleaning compound is [H^{+}] = 3.2\times 10^{-11}, then the pH, no unit, of the compound is:

pH = -\log_{10} [H^{+}]  (1)

pH = -\log_{10} (3.2\times 10^{-11})

pH = -\log_{10} 3.2 - \log_{10} (10^{-11})

pH = -\log_{10} \frac{32}{10} +11

pH = -\log_{10} 32 + \log_{10} 10 + 11

pH = -\log_{10} 32 +12

pH \approx 10.495

The pH of the clean compound is approximately 10.495.

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an express bus left town A at 18:15 hours and reached town B at 21:05 hours.how long did the journy take?
Dimas [21]
Hi!

Let's make a small chart

18:15 left town B
19:15 1 hour
20:15 2 hours
21:15 3 hours 

Since they actually arrived at 21:05, and not 21:15, we know it took more than 2 hours, but less than 3 hours. 

Subtract the extra time
21:15-21:05 = 00:10

Since there are 60 minutes in an hour, (60-10=50) we know it took 2 hours and 50 minutes. 

Another way to solve this would be to convert the times to decimals, and subtract,
21.05-18.15 = 2.9
Then convert the decimal to the time. 

9/10 of an hour = 50 minutes
It took 2 hours and 50 minutes

Hope this helps! :)
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3 years ago
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Answer:

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Step-by-step explanation:

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4 years ago
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Oksi-84 [34.3K]

Answer:

588 ft^2

Step-by-step explanation:

Lets start by making either a mental or physical list of the different sized sides on the prism. Check that the number of sides you assign to the dimensions has an overall total of six. I've made that mistake before lol it was a bit depressing.

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