Why is oxygen spelt o2

Answers

Answer 1

Answer:

it's a diatomic molecule–which is why it is O₂.

Explanation:

Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements. Only a handful of elements on the periodic table are diatomic such as nitrogen, hydrogen, fluorine, chlorine, bromine, and iodine.

Answer 2
It has 2 parts of Oxygen atoms.

Related Questions

Which of the following equations of CH4 + Cl2
-
CCl4+ HCl is balanced?
A. O CH4 + Cl2 - CC14+ HCI
B.
CH4 + Cl2 - CCl4 + 4HCI
С.
CH4 + 4Cl2 - CCl4 + 4HCI
D
CH4 + 2Cl2 - CCl4 +2HCI

Answers

Balanced equation : C. CH₄ + 4Cl₂⇒  CCl₄+ 4HCl

Further explanation  

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:  

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.  

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product  

3. Select the coefficient of the substance with the most complex chemical formula equal to 1  

Reaction

CH₄ + Cl₂⇒  CCl₄+ HCl

Give coefficient :

aCH₄ + bCl₂⇒  CCl₄+ cHCl

Make equation :

C, left=a, right=1⇒a=1

H, left=4a, right=c⇒4a=c⇒4.1=c⇒c=4

Cl, left=2b, right=4+c⇒2b=4+c⇒2b=4+4⇒2b=8⇒b=4

The equation becomes :

CH₄ + 4Cl₂⇒  CCl₄+ 4HCl

picture *** pls help

Answers

The volume of Oxygen at STP required : 251.25 L

Further explanation

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

Reaction(combustion) :

2C₂H₂(g)+5O₂(g)⇒4CO₂(g)+2H₂O(g)

mol C₂H₂ :

[tex]\tt \dfrac{100.5}{22.4}=4.49[/tex]

mol ratio C₂H₂ : O₂ = 2 : 5, so mol O₂ :

[tex]\tt \dfrac{5}{2}\times 4.49=11.23[/tex]

volume  O₂ at STP :

[tex]\tt 11.23\times 22.4=251.55~L[/tex]

Or you can use Avogadro's hypothesis :

In the same temperature and pressure, in the same volume conditions, the gas contains the same number of molecules  

So the ratio of gas volume will be equal to the ratio of gas moles  :

[tex]\tt \dfrac{V_1}{V_2}=\dfrac{n_1}{n_2}\\\\\dfrac{100.5}{V_2}=\dfrac{2}{5}\\\\V_2=\dfrac{100.5\times 5}{2}=251.25~L[/tex]

The mixture of sodium bicarbonate (a base) with nitric acid (an acid) produces a salt and water. This type of reaction is known as which of the following?

A: oxidation-reduction
B: neutralization
C: single replacement
D: synthesis

Answers

Neutralization I think

Please answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!

Answers

It’s A or B but liquids take the shape of their container so I bet you it’s B

What would be one way to avoid static electricity? А) Dry cotton fabrics and synthetic fabrics separately. B) Run a metal clothes hanger across your dry hair. C Use a blow dryer to dry your hair. D Wear shoes with rubber soles.​

Answers

Answer: The answer would be A.

Explanation:

Answer: B

Explanation:

Which ion would represent the ion of an element from Group 2A?
A2+
Y3+
X2-
Z+

Answers

Answer:

A2+

..........

Explanation:

they lose 2 electrons to form an ion

A gas sample has volume 3.00 dm3 at 101
kPa. What will be the volume if the
pressure is reduced to 14.2 kPa?

Answers

Answer:

21.3dm³

Explanation:

Given parameters:

Initial volume of gas = 3dm³

Initial pressure  = 101kPa

Final pressure  = 14.2kPa

Unknown

Final volume  = ?

Solution:

To solve this problem, we use the Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".

Mathematically;

                P₁ V₁  = P₂ V₂

P and V are pressure and Volume

1 and 2 are the initial and final states

Now insert the parameters and solve;

         101 x 3 = 14.2 x V₂  

                  V₂  = 21.3dm³

RIGHT ANWSER WILL BE MARKED BRAINLIEST

Answers

Answer:

11460

Explanation:

PLEASE HELP I WILL GIVE BRAINLIEST!!! Its due tonight at 12:00

Answers

Answer:

c

Explanation:

we have only distance vs time graph so c is the right answer that cart is moving with constant speed of 0.5m/s

confirmed

first calculate distance which is from 2 to 5.5

5.5-2=3.5

apply the formula of velocity

v=s/t

v=3.5/7=0.5

Answer:

Answer is C

Explanation:

v= 3.5/7 = 0.5

Steel has a density of 7.8 g/cm3. What is the volume of a 78-gram piece of steel?

Answers

Answer:

10 cm³

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\[/tex]

From the question we have

[tex]volume = \frac{78}{7.8} \\ [/tex]

We have the final answer as

10 cm³

Hope this helps you

write the name of the first twenty elements with their symbols and their atomic number​

Answers

Answer:

1 Hydrogen H

2 Helium He

3 Lithium Li

4 Beryllium Be

5 Boron B

6 Carbon C

7 Nitrogen N

8 Oxygen O

9 Fluorine F

10 Neon Ne

11 Sodium Na

12 Magnesium Mg

13 Aluminium Al

14 Silicon Si

15 Phosphorus P

16 Sulfur S

17 Chlorine Cl

18 Argon Ar

19 Potassium K

20. calcium Ca

Answer:

h - hydrogen (1)

he - helium (2)

li - lithium (3)

be - beryllium (4)

b - boron (5)

c - carbon (6)

n - nitrogen (7)

o - oxygen (8)

f - fluorine (9)

ne - neon (10)

na - sodium (11)

mg - magnesium (12)

al- aluminium (13)

si - silicon (14)

p - phosphorus (15)

s - sulfur (16)

cl - chlorine (17)

ar - argon (18)

k - potassium (19)

ca - calcium (20)

When an ionic bond forms what type of ions are joined?

Answers

It usually becomes a positive ion, or cation.

State the total number of electrons occupying all the p- orbitals in one atom of chlorine .

Answers

Answer:A chlorine atom in its ground state has a total of seven electrons in orbitals related to the atoms third energy level.

Explanation:

how does atomic radius affect coulombic attraction?

Answers

According to Coulomb's Law, as the atomic number increases within a series of atoms, the nuclear attraction for electrons will also increase, thus pulling the electron(s) closer to the nucleus.

2AI + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of Al2(SO4)3 would be formed if 250g H2SO4 completely reacted with
aluminum?
2
181.2 g
313.8 g
273.7 g
201.9 g
Please help!!!!!

Answers

Answer:

B. 313.8

Explanation:

Which of the following statements best describes the relationship between the elements phosphorus (P), arsenic (As) and bismuth (Bi)?
A. The elements are in the same period because they have the same numbers of energy levels, but different reactivity.
B. The elements are in the same group because they have the same numbers of energy levels, but different reactivity.
C. The elements are in the same period because they have similar reactivity and the same number of valence electrons.
D. The elements are in the same group because they have similar reactivity and the same number of valence electrons.

Answers

Answer:

A

Explanation:

WHATS THE DIFFERENCE BETWEEN MASS AND WEIGHT WELPPPPP

Answers

Answer:

Mass is amount of matter. Weight is how that matter is affected by gravity.

Explanation:

In the reaction 2AgI + Na2S → Ag2S +2NaI, calculate the number of moles of AgI needed to react with 85.0 g

Answers

Answer:

8.5gNaI × 1molNaI/78gNaI × 234.7g AgI / 1 MOL AgI × 2Mol Ag I / 1mol Na2S=51.2 g of AgI reacts with Na2 S

Explanation:

conversion factor is used to make sure that all the units cancels with the other units and we only remain with the mass of Ag I which is 51.2g but since the number of moles can be calculated by dividing with the relative molecular mass therefore 51.2g/234.7gmol=0.22mol

Where v stands for __________________________________ and the units are meters per second (m/s).

Answers

Answer:

Velocity

Explanation:

Answer: velocity I’m sure

Explanation:

Make
a claim about why cells need ribosomes.
Summarize evidence to support the claim
and explain your reasoning.
ls?

Answers

Cells need ribosomes to make protein.

If you could answer any it would be deeply appreciated.

Answers

Answer:magnesium plus nitrogen is : magnesium nitride

Explanation:

Which choices are layers of the atmosphere?

Select the five correct answers.


Thermosphere


Meteorosphere


Croposphere


Stratosphere


Mesosphere


Danosphere


Exosphere


Troposphere

Answers

Answer:

Mesosphere

Stratosphere

Thermosphere

Troposphere

Exosphere

Explanation:

The exosphere refers to the farthest region of the atmosphere that gradually fades into space.

The troposphere is the lowest layer of atmosphere. It is the layer where weather changes occur.

The thermosphere is right above the mesosphere but just below the exosphere. It is the layer where photoionization/photodissociation of molecules occurs thereby creating ions. This largely owes to interaction of molecules in this layer with ultraviolet radiation.

The stratosphere is composed of gases. Prominent among them is ozone which serves as a blanket against the sun's ionizing radiation.

The mesosphere lies above the stratosphere but just below the thermosphere. Temperature decreases steadily with height in the mesosphere.

A sample of gas is stored at 15 atmosphere and has a volume of 5 liters.If the volume of the gas is reduced to 3 liters,what will the new pressure be?

Answers

The new pressure will be : 25 atm

Further explanation

Boyle's Law  

At a constant temperature, the gas volume is inversely proportional to the pressure applied  

[tex]\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]

P₁=15 atm

V₁=5 L

V₂= 3 L

[tex]\tt P_2=\dfrac{P_1.V_1}{V_2}\\\\P_1=\dfrac{15~atm\times 5~L}{3~L}\\\\P_1=\boxed{\bold{25~atm}}[/tex]

Can somebody that is good at science help me with these two questions? Please and thank you!

Answers

1. The forces make the train float because the poles are the same on each side causing them to repell (north and north repell)

2. B is more stable. If you pushed A it would fall and that would cause more disturbance

Which statement is true about molarity and percent by mass? (3 points)

Answers

Molarity is the amount of solute in 1L of solution while percent by mass is the ratio of the mass solute to the mass of solution multiplied by 100. Both quantities are used measure the amount of solute in solution.

What is molarity and percent by mass?

The question is incomplete however, I will try to explain molarity and percent by mass.

The term molarity means the number of moles of a substance is 1 L of solution while the percent by mass is the ratio of the mass solute to the mass of solution multiplied by 100.

Both molarity and percent by mass shows the amount of solute in a solution.

Learn more about molarity: https://brainly.com/question/12127540

Answer:

Both are ratios of the amount of solute over the amount of solution/

Explanation:

took test.

what happens if the temperature of a system at equilibrium is increased?

Answers

Increasing the temperature decreases the value of the equilibrium constant. ... If you increase the temperature, the position of equilibrium will move in such a way as to reduce the temperature again. It will do that by favouring the reaction which absorbs heat.
There are multiple answers:

1. The relative amount of products at equilibrium increases for an endothermic reaction
2. The relative amount of products at equilibrium decreases for an exothermic reaction
(Extra) If the temperature of a system at equilibrium is decreased

1. The relative amount of products at equilibrium decreases for an endothermic reaction
2. The relative amount of products at equilibrium increases for an exothermic reaction

Hope this helps!

true or false, during a change of state, the thermal energy gained or lost by a material changes the kinetic energy of its particles

Answers

Answer:

true..... not false okkkkk

The statement is true.

The chemical formula for the ionic compound aluminum sulfite is Al2(SO3)3. Explain why there are 2 cations for every 3 anions in this compound.

Answers

Answer:

Explanation:

While trying to write the chemical formula for a compound (a neutral molecule), one must identify and exchange the charge of the cation with that of the anion to become the subscript of one other. For example

Aluminium oxide has Aluminium (Al) and oxygen (O); since Al has a charge of 3+ (the cation) and O has a charge of 2- (the anion), the compound would have it's charges as Al³⁺O²⁻ and when the charges are exchanged to there subscripts, it would form Al₂O₃; thus there would be two cations of aluminium for every three anions of oxygen in order to have a neutral molecule.

This same explanation can be given to Aluminium sulfite. Aluminium sulfite has Aluminium (Al) and sulfite (SO₃). Al has a charge of 3+ (cation) while sulfite has a charge of 2- (anion), with the compound having it's charges as Al³⁺(SO₃)²⁻ and when the charges are exchanged to there subscripts, it would form Al₂(SO₃)₃ and would thus have 2 cations of aluminium (Al³⁺) for every 3 anions of sulfite (SO₃³⁻) in order to have a neutral molecule.

What is that Molar mass of ammonium phosphite?

Answers

Answer:

149.09 g/mol GOOD LESSONS

Answer:

The answer is 149.09 g/mol

Explanation:

I hope this helps!!

what are the energy transformations taking place in your alarm clock

Answers

Answer:

Explanation:

The clock now has potential energy. When the alarm rings, the potential energy is converted into kinetic energy and sound energy.

Alarm clock runs due to the electrical energy. Due to the electric current, the electric motor rotates the blade. It means that the electrical energy is converted into mechanical energy.

The mechanical energy finally generates vibrations which cause sound.    

Thus, energy transformation which takes place in alarm clock will follow the order-

Electrical to mechanical to sound.

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