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DerKrebs [107]
1 year ago
13

What would the pOH of a solution be if the pH is 9.4

Chemistry
1 answer:
Alika [10]1 year ago
4 0
<h2>Answer:</h2>

pOH = 4.6

<h2>Explanations:</h2>

The sum of pH and pOH of a solution is 14as shown:

pH+pOH=14

Given the following parameter

pH = 9.4

Substitute the given parameters into the formula to have:

\begin{gathered} 9.4+pOH=14 \\ pOH=14-9.4 \\ pOH=4.6 \end{gathered}

Hence the pOH of the solution of pH of 9.4 is 4.6

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In this part of the periodic table, what type of elements are in the group that includes elements cu, ag, and au?
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WORTH 20 POINTS Confirmation bias is where a scientist may change the data to support a certain bias.
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3 years ago
What is the mass of 1.7 × 1023 atoms of zinc (Zn)?
Rudiy27

Number of moles is defined as the ratio of given mass in g to the molar mass.

The mathematical formula is:

Number of moles = \frac{given mass in g}{molar mass}   (1)

Number of zinc atoms is equal to 1.7\times10^{23}, by Avogadro number, number of moles can be calculated.

As, 1 mol=6.022\times10^{23} atoms, hence,

1.7\times10^{23}\times\frac{1 mol}{6.022\times10^{23} }

= 0.2822 mol

Now, from formula (1), calculate mass in g (molar mass of zinc = 65.4 g/mol)

0.2822 mol = \frac{mass in g}{65.4 g/mol}

mass in g  = {0.2822 mol \times 65.4 g/mol

= 18.45588 g

Thus, by rounding off the above number, it will come near about 19 g approximately.

Hence, option (C) is the correct answer.



 



8 0
4 years ago
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