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kondaur [170]
3 years ago
12

Which element’s atomic number is the same as its atomic weight?

Chemistry
1 answer:
olya-2409 [2.1K]3 years ago
3 0
Hydrogen's atomic number is one and atomic weight is 1 tooo so its hydrogen
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If the actual yielsd of a reaction is 50 g and the theoretical yield is 60 g. What is the percent yield.
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M₁=50 g
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3 years ago
A solution has a poh of 7. 1 at 10∘c. what is the ph of the solution given that kw=2. 93×10−15 at this temperature? remember to
Gnom [1K]

A solution has a pOH of 7. 1 at 10∘c. Then the pH of the solution given that kw=2. 93×10−15 at this temperature is 7.4 .

It is given that,

pOH of solution = 7.1

Kw =2.93×10^(-15)

Firstly, we will calculate the value of pKw

The expression which we used to calculate the pKw is,

pKw=-log [Kw]

Now by putting the value of Kw in this expression,

pKw =−log{2.93×10^(-15)}

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Now we have to calculate the pH of the solution.

As we know that,

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Now put all the given values in this formula,

pH+7.1=14.5

pH=7.4

Therefore, we find the value of pH of the solution is, 7.4.

learn more about pH value:

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1 year ago
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Answer:

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Which of the following characteristics do all of the outer planets have in common? A. They lack moons. B. They are small and den
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I think the correct answer from the choices listed above is option D. Outer planets are mostly made up of gases and are huge in size. These gases are hydrogen and helium. <span>These outer planets are Saturn, Jupiter, Uranus, and Neptune. Hope this answers the question.</span>
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