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ella [17]
3 years ago
10

In science class, Jonathan added a small amount of sand to a beaker of water. He stirred it vigorously so that all the sand swir

led around in the water. Jonathan then claimed to his classmates that he had made a solution. However, his teacher told Jonathan that he was mistaken. Why was the teacher correct?
Jonathan made a compound, not a mixture


A solid substance cannot dissolve in water to form a solution


The sand will eventually settle to the bottom and will not dissolve in the water


A chemical reaction did not take place, so a solution was not formed
Chemistry
2 answers:
abruzzese [7]3 years ago
8 0
The answer is Option D
Tju [1.3M]3 years ago
7 0
Answer is (D) A chemical reaction did not take place.

What Jonathan created was a mixture.
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n acid with a pKa of 8.0 is present in a solution with a pH of 6.0. What is the ratio of the protonated to the deprotonated form
Nady [450]

Answer : The ratio of the protonated to the deprotonated form of the acid is, 100

Explanation : Given,

pK_a=8.0

pH = 6.0

To calculate the ratio of the protonated to the deprotonated form of the acid we are using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

pH=pK_a+\log \frac{[Deprotonated]}{[Protonated]}

Now put all the given values in this expression, we get:

6.0=8.0+\log \frac{[Deprotonated]}{[Protonated]}

\frac{[Deprotonated]}{[Protonated]}=0.01  

As per question, the ratio of the protonated to the deprotonated form of the acid will be:

\frac{[Protonated]}{[Deprotonated]}=100  

Therefore, the ratio of the protonated to the deprotonated form of the acid is, 100

5 0
3 years ago
The radius of the large cylinder of a hydrolic press
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Answer: 1) 400N

2)1.6

Explanation:

1) 5cm = 100N of force

so

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2) 0.4 X 4 = 1.6

3 0
3 years ago
A sample of oxygen gas (O2) at STP has a mass of 48.0 grams. What is the volume of the gas?
zvonat [6]
P * V = n R T 
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Ha is a monoprotic weak acid. if a 0.015 m ha solution is 2.5% dissociated (or ionized), what is the acid dissociation constant
gladu [14]
Get on mathpapa is shows you the answer and how to explain it
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3 years ago
Solve each of the following problems using one or more conver-sion factors:a. A container holds 0.500 qt of liquid. How many mil
svetoff [14.1K]

Answer:

a. 473mL.

b. 79.38kg

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Explanation:

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0.500qt * (946mL / 1qt) = 473mL

b. 1lb is equal to 0.4536kg, 175lb are:

175lb *(0.4536kg / 1lb) = 79.38kg

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8 0
3 years ago
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