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Zina [86]
3 years ago
8

Positron Emission Tomography (PET) is an advanced medical scanning technique. Fluorine-18 is a commonly used isotope for PET sca

ns. Which equation shows positron emission by F-18?
A. equation A

B. equation B

C. equation C

D. equation D

Chemistry
1 answer:
TiliK225 [7]3 years ago
3 0

Answer:

Option D. equation D

Explanation:

Positron is simply a beta plus decay or superscript 0 e subscription 1 (0 1 e).

Now, let us consider the options given:

Option A is emitting alpha decay

Option B is emitting beta minus decay.

Option C is emitting beta minus decay.

Option D is emitting beta plus decay also known as Positron.

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Classify these substances as acidic, basic, or neutral: vinegar, baking soda, tomato juice, sugar. A) vinegar-acidic Baking soda
Gnesinka [82]

Answer:

A) vinegar-acidic Baking soda-basic Tomato juice-acidic Sugar-neutral.

Explanation:

Hello,

In this case, it is widely acknowledged that vinegar is a diluted and processed form of acetic acid which is of course acidic as well as tomato juice which has a pH of about 4.2. Baking soda, which is chemically known as sodium bicarbonate has a pH greater than 7, for that is reason it is basic. Finally, sugar, is known by its neutrality, for which its pH is about 7, for that reason it is neutral. In such a way, answer is A) vinegar-acidic Baking soda-basic Tomato juice-acidic Sugar-neutral.

Regards.

4 0
3 years ago
Calculate the % dissociation of 0.10 M solution of acetic acid (pKa = 4.75)
madreJ [45]

Given :

Molarity of acetic acid solution, M = 0.10 M.

pKa of acetic acid, pKa = 4.75 .

To Find :

Percentage dissociation of 0.10 M solution of acetic acid.

Solution :

We know, pK_a = -log\  K_a

Taking antilog both side, we get :

K_a = 1.78\times 10^{-5}

Since, acetic acid has 1 hydrogen atom to loose , so it is a monoprotic acid.

Now, percentage dissociation of monoprotic acid is given by :

\alpha = \sqrt{\dfrac{K_a}{C}}\\\\\alpha =\sqrt{ \dfrac{1.78\times 10^{-5}}{0.1}}\\\\\alpha =  0.0133\times 100 = 1.33 \%

Hence, this is the required solution.

3 0
3 years ago
A fixed, single pulley that is used to lift a block does which one of the following?
olga55 [171]
The answer is C, it makes the block easier to lift by changing the direction of the force needed to lift it 
4 0
4 years ago
Read 2 more answers
What is a rise in seawater levels pushed to shore during a hurricane called?
zalisa [80]

Answer:

A storm surge

Explanation:

A rise in sea level that happens during tropical cyclones, and storms like typhoons or hurricanes is called a Storm Surge.

5 0
4 years ago
How chemistry is a part of your morning routine
natali 33 [55]
When you wake up early, and go brush your teeth the toothpaste is made of chemical compounds, the water that you use to wash your faceis treated chemically. To make the coffee sugar or sweetener has chemical compounds.

hope this helps!
8 0
3 years ago
Read 2 more answers
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