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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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Chemical Equations
vagabundo [1.1K]

Answer:

0.712 moles of NO₂ are formed.

Explanation:

First, we need to write the balanced equation:

2 N₂O₅(g) ⇄ 4 NO₂(g) + O₂(g)

From the balanced equation, we can see the relationship between the moles of N₂O₅ and the moles of NO₂. Every 2 moles of N₂O₅ that react, 4 moles of NO₂ are formed. Let us apply this relationship to the information given by the problem (0.356 moles of N₂O₅):

0.356molN_{2}O_{5}.\frac{4molNO_{2}}{2molN_{2}O_{5}} =0.712molNO_{2}

3 0
3 years ago
Alcohol or acid will travel the furthest up the paper chromatography? pls help thanks and explain
d1i1m1o1n [39]

Answer:

True

Explanation:

Yes.

The distance that the molecules move depends on their solubility in the solvent and the size of the molecules. Heavy molecules will travel slower and therefore travel a shorter distance in the time the chromatography is run.

We know from such things as felt tip pens that colourings can be soluble in different solvents. Water soluble felt pens have colours that are - well - water soluble. Permanent felt pens have colours that are insoluble in water but that are soluble in another solvent. This could well be alcohol.

The water soluble colours may also be soluble in alcohol. The solubility in alcohol will be different from the solubility in alcohol, and so the Rf value ( the distance travelled) will also be different.

Because of the complicated shapes of the colours, the colours may not have the same order in the Rf values in the different solvents.

4 0
3 years ago
Can somebody please help with this question?
Leni [432]
Most of the mass of an atom is located in the (nucleus), and most of the volume is taken up by the (electron clouds).

The ones in the parenthesis are your answers.

Hope this helps!
7 0
3 years ago
HELPPPP.. NEED AN ANSWER SOON.. DBA IN 10 MIN FOR CHEMISTRY
Bad White [126]

Q1: sort your numbers into numerical order so you can determine the highest and lowest measured values. and then subtract the lowest measured value from the highest measured value. Now determine that the answer is the precision.

Q2: In one meter there are 100 centemeter. Now you got 5.8 miles per hour which will become 580 centemeter per hour. In addition, there are 60 minutes in an hour. Based on what we know, 580 centemeters per hour will and should become 580/60 cm/min

3 0
3 years ago
Read 2 more answers
The bonds in the compound MgSO4 can be described as
Butoxors [25]
C. Sulfur and oxygen (non metals) forms a covalent bond while the magnesium (a metal) will react with both non metals to form an ionic bond
7 0
3 years ago
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