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Fittoniya [83]
3 years ago
15

Why is pure silicon a poor conductor at room temperature?

Chemistry
1 answer:
Georgia [21]3 years ago
5 0
Because pure silicon is a perfect semiconductor.

For room temperature, it rarely conducts, you can search for the threshold temperature, the characteristic equation is fairly complicated. 
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What would the pOH of a solution be if the pH is 9.4
Alika [10]
<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

4 0
2 years ago
A solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution is observed to have a
torisob [31]

Answer:

C) k_a=1.3\times 10^{-5}

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,  

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

pH=-log(\sqrt{k_a\times C})

Where, C is the concentration = 0.5 M

Given, pH = 2.94

Moles = 0.100 moles

Volume = 1.00 L

So, Molarity=\frac{Moles}{Volume}=\frac{0.100}{1.00}\ M=0.100\ M

C = 0.100 M

2.94=-log(\sqrt{k_a\times 0.100})

\log _{10}\left(\sqrt{k_a0.1}\right)=-2.94

\sqrt{0.1}\sqrt{k_a}=\frac{1}{10^{2.94}}

k_a=1.3\times 10^{-5}

4 0
3 years ago
What is the most accurate statement concerning ionization energy? A Metals tend to have lower ionization energies than nonmetals
elena55 [62]

Answer: A, metals tend to have lower ionization energies than nonmetals

Explanation:

Got it right on the quiz

4 0
3 years ago
Meg used two examples to represent two different states of matter.
torisob [31]

Answer:

c  Example 1 represents a liquid and Example 2 represents a solid.

Explanation:

Example 1: Young children dancing slowly around one another

The young children dancing slowly around one another can be pictured as the flow of liquid. In liquids, the molecules are held about weakly and they slide on top of each other. They are held by weak attractive forces. This is clear picture of a liquid.

Example 2: Newborn babies sitting in their given spots in a crib

This is clear example of a solid. In a solid the molecules are held about a fixed spot. The attractive forces in liquids is very great and the molecules therein do not move about randomly.

3 0
3 years ago
3. Students were measuring distances and found one to be 2.04 m. When they asked the teacher if their measurement was correct, t
Vlada [557]

Answer:

5.56

Explanation:

4 0
3 years ago
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