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Bingel [31]
3 years ago
5

QUESTION 19

Chemistry
1 answer:
spayn [35]3 years ago
8 0

The statement is false. Sara's trouble with listening to the lecture in class because she had just had an argument with her best friend is not an example of physical noise.

A physical noise refers to a situation whereby communication is impeded by sound coming from outside the individual such as music blaring out of a horn speaker.

Another type of noise is psychological noise. This arises when the receiver of a message is distracted by his/her internal thought processes.

Sara is clearly experiencing a psychological and not a physical noise.

Learn more: brainly.com/question/537365

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Additional Practice Questions
bezimeni [28]

pH of solution = 13.033

<h3>Further explanation</h3>

Given

2.31 g Ba(OH)₂

250 ml water

Required

pH of solution

Solution

Barium hydroxide is fully ionized, means that Ba(OH)₂ is a strong base

So we use a strong base formula to find the pH

[OH ⁻] = b. Mb where

b = number of OH⁻ /base valence

Mb = strong base concentration

Molarity of Ba(OH)₂(MW=171.34 g/mol) :

\tt M=\dfrac{mol}{L}=\dfrac{2.31~g\div 171.34~g/mol}{0.25~L}\\\\M=0.054

Ba(OH)₂ ⇒ Ba²⁺ + 2OH⁻(b=valence=2)

[OH⁻]= 2 . 0.054

[OH⁻] = 0.108

pOH= - log 0.108

pOH=0.967

pOH+pH=14

pH=14-0.967

pH=13.033

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