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Taya2010 [7]
3 years ago
13

How many neutrons are found in one atom of 20f?

Chemistry
2 answers:
Anit [1.1K]3 years ago
7 0
The amount of neutrons are found in one atom of 20f would definitely have to be 20f has around 11 neutrons .
AVprozaik [17]3 years ago
3 0

One atom of 20 F contains 11 neutrons

<h3>Further Explanation</h3><h3>An atom</h3>
  • An atom is the smallest particle of an element that can take part in a chemical reaction. An atom is made up of sub-atomic particles; neutrons, protons and electrons.
<h3>Protons</h3>
  • Protons are subatomic particles that are found in the nucleus of an atom. They are positively charged. with a charge of +1.
  • The number of protons differ from one element to another and thus used as the atomic number of an individual element.
  • The nucleus of an atom is positively charged due to the positive charge of the protons.  
  • Additionally, protons do not take part in chemical reactions but in nuclear reactions.
<h3>Neutrons  </h3>
  • They are sub-atomic particles in an atom that are found in the nucleus of an atom. They have a zero charge or no charge.
  • Neutrons are slightly heavier than protons.
  • The number of protons and neutrons in a nucleus of an atom results to the atomic mass number of an atom. Like protons they only take part in nuclear reactions.
<h3>Electrons  </h3>
  • They are found orbiting the nucleus on energy shells based on Clouds’ theory. Electrons are negatively charged each with a charge of -1.
  • The number of electrons and protons in a neutral atom are equal. Additionally they have the least mass of the three sub-atomic particles.
  • Electrons are the only sub-atomic particles that take part in chemical reactions.
<h3>Atomic number</h3>
  • Atomic number refers to the number of protons in the nucleus of an atom. The atomic number of fluorine is 9, since it has 9 protons in its nucleus.
<h3>Mass number</h3>
  • Mass number refers to the sum of protons and neutrons in the nucleus of an atom.
  • Mass number = protons + neutrons

Therefore; 20 F has a mass number of fluorine.

Neutrons = Mass number - protons

                 = 20 - 9

                 = 11

Therefore; 20 F has 11 neutrons

Keywords: Atom, sub-atomic particles, electrons, protons, neutrons  

<h3>Learn more about:</h3>
  • Sub-atomic particles: brainly.com/question/1264222
  • Electrons: brainly.com/question/1264222
  • Protons: brainly.com/question/1264222
  • Neutrons: brainly.com/question/1264222
  • Mass number: brainly.com/question/2152789
  • Atomic number: brainly.com/question/8100107

Level: High school

Subject: Chemistry  

Topic: Atomic structure

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You need to produce a buffer solution that has a pH of 5.26. You already have a solution that contains 10. mmol (millimoles) of
Andreas93 [3]

The question is incomplete, complete question is :

You need to produce a buffer solution that has a pH of 5.50. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this solution? The pka of acetic acid is 4.74.

Answer:

33.11 millimoles of acetate we will need to add to this solution.

Explanation:

To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:

pH=pK_a+\log(\frac{[salt]}{[acid]})

Where :

tex]pK_a[/tex] = negative logarithm of acid dissociation constant of acid

[salt] = Concentration of salt

[Acid] = Concentration of salt

We have:

pH = 5.26

pK_a=4.74

[salt] =[CH_3COO^-] = ?

[acid] = [CH_3COOH]=10.0 mmol

5.26=4.74+\log(\frac{[CH_3COO^-]}{[10.0 mmol]})

[CH_3COO^-]=33.11 mmol

33.11 millimoles of acetate we will need to add to this solution.

3 0
4 years ago
Linolenic acid (C18H30O2 - M.W. = 278.42 g/mol) reacts with hydrogen gas according to the equation: C18H30O2 + 3H2 (g) → C18H36O
Ludmilka [50]

Answer:

2.53 L is the volume of H₂ needed

Explanation:

The reaction is: C₁₈H₃₀O₂ + 3H₂ → C₁₈H₃₆O₂

By the way we can say, that 1 mol of linolenic acid reacts with 3 moles of oxygen in order to produce, 1 mol of stearic acid.

By stoichiometry, ratio is 1:3

Let's convert the mass of the linolenic acid to moles:

10.5 g . 1 mol / 278.42 g  = 0.0377 moles

We apply a rule of three:

1 mol of linolenic acid needs 3 moles of H₂ to react

Then, 0.0377 moles will react with (0.0377 . 3 )/1 = 0.113 moles of hydrogen

We apply the Ideal Gases Law to find out the volume (condition of measure are STP) → P . V = n . R . T → V = ( n . R .T ) / P

V = (0.113 mol . 0.082 L.atm/mol.K . 273.15K) 1 atm = 2.53 L

4 0
3 years ago
Which ligand binds the tightest? Ligand A, with a Kd of 10^-9M Ligand B, with a Kd of 10^-3M Ligand C, with a percent occupancy
padilas [110]
To answer this item, we must take note that the ligand that binds the tightest is the one with the lowest dissociation constant, Kd. Kd's for both A and B are already given so, we only need to solve Kds for C and D. 
  Kd of C
                        0.3 = (1x10⁻⁶)/(1x10⁻⁶ + Kd)   ; Kd = 2.3x10⁻⁶
 Kd of D  
                        0.8 = (1x10⁻⁹)/(1x10⁻⁹ + Kd)   ; Kd = 2.5x10⁻10
Since Ligand D has the least value of dissociation constant then, it can be concluded that it binds the tightest. 
6 0
3 years ago
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