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loris [4]
2 years ago
9

Fill in the blanks to determine the number of protons and electrons in an oxygen ion. (consult the periodic table to determine t

he number of protons in a neutral oxygen atom.) the o2− ion has _____ protons and _____ electrons. express your answers as integers separated by a comma.
Chemistry
2 answers:
CaHeK987 [17]2 years ago
8 0

The Oxygen ion (O2-) has 8 protons and 10 electrons

<h2>Further Explanation</h2><h3>An atom  </h3>
  • An atom is defined as the smallest particle of an element that can take part in a chemical reaction.
  • Atoms are made of energy shells and the inner nucleus.
  • It is also made up of subatomic particles, protons and neutrons.
<h3>Neutrons  </h3>
  • They are sub-atomic particles in an atom that are found in the nucleus of an atom.
  • The number of protons and neutrons in a nucleus of an atom results to the atomic mass number of an atom.
<h3>Protons</h3>
  • Protons are subatomic particles that are found in the nucleus of an atom.
  • The number of protons differ from one element to another and thus used as the atomic number of an individual element.
<h3>Electrons  </h3>
  • They are found orbiting the nucleus on energy shells based on Clouds’ theory.
  • The number of electrons and protons in a neutral atom are equal.
  • Electrons are the only sub-atomic particles that take part in chemical reactions.
<h3>Ions </h3>
  • Ions are formed as a result of gaining or loosing of electrons by a atom to attain a stable configuration based on the octet rule.
<h3>Cations </h3>
  • Cations are type of ions that are formed when an atom looses electrons to form a stable configuration. Cations are positively charged.
  • For example, a neutral sodium atom (Na) looses one electron to form sodium ion (Na+) which is a cation.
  • Which means, a neutral sodium atom has 11 electrons and 11 protons while a sodium ion has 10 electrons and 11 protons.
<h3>Anions </h3>
  • Anions are type of ions that are formed when an atom of an element gains electrons. They are negatively charged.
  • For example, a neutral oxygen atom (O) gains two electrons to form oxygen ion (O2-) which is an anion.
  • Therefore, a neutral oxygen atom has 8 electrons and 8 protons while an oxygen ion has 10 electrons and 8 protons.

Keywords: Atom, sub-atomic particles, electrons, protons, neutrons, ions, anions cations

<h3>Learn more about:</h3>
  • Sub-atomic particles: brainly.com/question/5468892
  • Electrons: brainly.com/question/5468892
  • Protons: brainly.com/question/5468892
  • Neutrons: brainly.com/question/5468892

Level: High school

Subject: Chemistry  

Topic: Atomic structure

Sub-topic: Ion formation

saveliy_v [14]2 years ago
5 0
The protons in an nucleus of an atom will not change unless a nuclear reaction takes place. The number of protons is equal to the atomic number of the element. For a neutral atom, the number of electrons and protons are equal. When they are unequal, then the atom occurs as an ion. It will has a net charge with it. The ion O²⁻ has a net charge of negative positive 2 because it has 2 more electrons than its protons. Since neutral oxygen has 8 protons, then O²⁻ ion has 8 protons and 10 electrons.
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Suppose you have 200.0 mL of a 0.750 M sodium hydroxide solution. How many
Nikolay [14]

Answer:

0.15 moles of sodium hydroxide are in the solution.

Explanation:

Molarity is a unit for expressing concentration of solutions. Molarity is defined as the number of moles of solute per liter of solution.

The molarity of a solution is calculated by dividing the moles of the solute by the liters of the solution:

Molarity (M)=\frac{number of moles of solute}{volume}

Molarity is expressed in units (\frac{moles}{liter}).

So, a molarity of 0.750 M indicates that 0.750 moles are present in 1 L of solution. Then the following rule of three can be applied: if in 1000 mL (being 1 L = 1000 mL) there are 0.750 moles, in 200 mL how many moles are there?

amount of moles=\frac{200 mL*0.750 moles}{1000 mL}

amount of moles=0.15

<u><em> 0.15 moles of sodium hydroxide are in the solution.</em></u>

5 0
2 years ago
If an equal number of moles of reactants are used, do the following equilibrium mixtures contain primarily reactants or products
puteri [66]

<u>Answer:</u>

<u>For a:</u> The equilibrium mixture contains primarily reactants.

<u>For b:</u> The equilibrium mixture contains primarily products.

<u>Explanation:</u>

There are 3 conditions:

  • When K_{eq}>1; the reaction is product favored.
  • When K_{eq}; the reaction is reactant favored.
  • When K_{e}=1; the reaction is in equilibrium.

For the given chemical reactions:

  • <u>For a:</u>

The chemical equation follows:

HCN(aq.)+H_2O(l)\rightleftharpoons CN^-(aq.)+H_3O^+(aq.);K_{eq}=6.2\times 10^{-10}

The expression of K_{eq} for above reaction follows:

K_{eq}=\frac{[CN^-][H_3O^+]}{[HCN][H_2O]}=6.2\times 10^{-10}

As, K_{eq}, the reaction will be favored on the reactant side.

Hence, the equilibrium mixture contains primarily reactants.

  • <u>For b:</u>

The chemical equation follows:

H_2(g)+Cl_2(g)\rightleftharpoons 2HCl(g);K_{eq}=2.51\times 10^{4}

The expression of K_{eq} for above reaction follows:

K_{eq}=\frac{[HCl]^2}{[H_2][Cl_2]}=2.51\times 10^{4}

As, K_{eq}>1, the reaction will be favored on the product side.

Hence, the equilibrium mixture contains primarily products.

4 0
2 years ago
If it takes 38.70cm³ of 1.90 M NaOH to neutralize 10.30cm³ of H2SO4 in a battery, What's the Molarity of the H2SO4 ?​
arlik [135]

Answer: 3.57M

Explanation:Please see attachment for explanation

3 0
2 years ago
Read 2 more answers
Type the correct answer in the box. Express your answer to three significant figures.
satela [25.4K]

Answer:

The partial pressure of argon in the jar is 0.944 kilopascal.

Explanation:

Step 1: Data given

Volume of the jar of air = 25.0 L

Number of moles argon = 0.0104 moles

Temperature = 273 K

Step 2: Calculate the pressure of argon with the ideal gas law

p*V = nRT

p = (nRT)/V

⇒ with n = the number of moles of argon = 0.0104 moles

⇒ with R = the gas constant = 0.0821 L*atm/mol*K

⇒ with T = the temperature = 273 K

⇒ with V = the volume of the jar = 25.0 L

p = (0.0104 * 0.0821 * 273)/25.0

p = 0.00932 atm

1 atm =101.3 kPa

0.00932 atm = 101.3 * 0.00932 = 0.944 kPa

The partial pressure of argon in the jar is 0.944 kilopascal.

5 0
2 years ago
A person throws a ball up into the air, and the ball falls back toward Earth. At which point would the kinetic energy be the low
dybincka [34]
It would be d bc when it’s at its lowest point it means not that much energy and that would be its lowest point which is D
6 0
2 years ago
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