What are groups on the periodic table? How many are there?

Answer:

C. You have two times the number of particles that are in 12 grams of carbon-12.

Explanation:

Avogadro's number, 6.022 ×10^23, equals the number of particles in 12 grams of carbon-12.

This mean 1 mole of a substance will equals to the number of particles that are in 12 grams of carbon-12.

Therefore, 2 moles of a substance will equals to two times the number of particles that are in 12 grams of carbon-12.

If the energy of the photon of light emitted from a hydrogen atom has a magnitude of 4.084 x 10-19 j, and the electron starts at level n = 4 then  final state of the electron is n=2

Here given data is energy of the photon of light emitted from a hydrogen atom has a magnitude of 4.084 x 10-19 j and electron starts at level n = 4 then from ground state to excited state n=2 final state are seen from given data  energy of the photon = E= -2.18×10⁻¹⁸J (1/nf²-1/ni²) using this formula ans is to be 0.235 and this energy is n=2 are seen thats why final state of electron are seen in n=2

Know more about energy of the photon

https://brainly.com/question/28496607

#SPJ4

Answer:a mouse

Explanation:

Answer: a mouse

Explanation:

This is kind of a pretty easy question:

- In order to get the number of atoms/entities of Neon, you will have to turn that 1009g of Neon into moles

-And then you have to use the moles and calculate it using Avogadro's Number which is 6.02 x 10^23

number of moles = mass/molar mass of element/compound

n = 1009g/20.18g/mol

n = 50 mol

Number of atoms/entities = 50 x  (6.02 x 10^23)

Number of atoms in 1009g of neon is 3.01 x 10^25 (scientific notation because its a really long number)

When particles move fast enough, these forces can no longer keep particles together.

Recall that the particles of a substance are in constant random motion. Hence, when more energy is added to the system, the particles within the system will have greater motion, and the temperature will increase.

The forces that keep molecules together in a particular state of matter are electrostatic forces. When particles move fast enough, these forces can no longer keep particles together.

It is common to use the analogy of an elastic material to represent the bonding between atoms in molecules. However, this analogy is not apt in a phase change because, for a phase change from liquid to gas, the bonds break completely and particles can move independently of each other.

We know that the average kinetic energy of the molecules of a substance depends on the temperature of the body. Therefore, a sample of liquid benzene at 80ºC and a sample of gaseous benzene at 80ºC will have the same average kinetic energy as benzene molecules.

Learn more: https://brainly.com/question/6284546

4 moles of Fe react with 3 moles of oxygen. Therefore, the mole ratio of iron to iron oxide in this process is 4:2.

The chemical element with the atomic number 8 and symbol O is called oxygen. It belongs to the periodic table's halogen group, is a very reactive nonmetal, and an oxidizing agent that easily produces oxides with most elements as well as other compounds.

The non-metallic element oxygen occurs naturally as a molecule. Two oxygen atoms that are tightly bound together make up each molecule. Oxygen is in a gaseous form at ambient temperature due to its low melting and boiling temperatures.

According to scientists, the oceans produce between 50 and 80 percent of the oxygen used on Earth. Oceanic plankton, which includes floating plants, algae, and certain bacteria that can photosynthesize, is the main source of this production.

Thus, 4 moles of Fe react with 3 moles of oxygen.

To learn more about oxygen, follow the link;

https://brainly.com/question/1506082

#SPJ1

Answer:

0.65moles of HCl was produced

Answer:

2KClO3 = 2KCl + 3O2

I hope it's helps you

Answer:

Explain that as the water evaporates, water molecules go into the air. The water molecules that evaporate become a gas called water vapor. Only the water evaporates, leaving the sodium and chloride ions behind. The sodium and chloride ions attract each other and re- form salt crystals.

Hope this helps!! :D

The bond formed is an ionic bond.

Element A has a total of 20 electrons in its electron cloud, while Element B has 16 electrons in its electron cloud. The difference in the number of electrons in each atom's electron cloud is the key factor determining the type of bond that will form between A and B.

Generally, when the difference in the number of electrons is greater than two, the bond formed will be an ionic bond. This is because the element with the greater number of electrons will have a stronger attraction to the other element, thus transferring electrons and forming a bond.

In this case, Element A has 20 electrons while Element B has 16 electrons, resulting in a difference of 4. Both will try to obtain a noble gas configuration.

In an ionic bond, one atom gives away one or more electrons to the other atom, resulting in an unequal sharing of electrons. The atom with the greater number of electrons (Element A in this case) gives away electrons, resulting in a positive charge. The atom with the lesser number of electrons (Element B in this case) receives electrons, resulting in a negative charge.

In the process, both obtain the noble gas configuration in their shell. Element A will do so by giving away 2 electrons to B and B will do so by gaining 2 electrons from A. This means that an ionic bond will form between the two elements.

As a result, the two elements form an electrostatic bond, with Element A being positively charged and Element B being negatively charged.

Therefore, an ionic bond is formed between Element A and Element B with the former having 20 electrons and the latter having 16 electrons in their electron cloud.

To know more about the ionic bond, refer here:

https://brainly.com/question/5277024#

#SPJ11

Answer:

Escherichia coli is a typical gram-negative rod bacterium. Its dimensions are those of a cylinder 1.0-2.0 micrometers long, with radius about 0.5 micrometers. Another gram-negative rod, less metabolically independent than E. coli, is Hemophilus influenzae, which has half the length and diameter.

Explanation:

Answer:

true

Explanation:

Because Mercury can be solidified when its temparature us brought to its freezing point. However, when returned to room temparature conditions, mercury does not exist in solid state for long, and returns back to its more common liquid form.

Answer:

d

Explanation:

A: mass never increases or decreases. It is a value that is the same everywhere in the universe. A is not correct.

B: it can be but that is not the only unit that can be used

C: A spring scale measures force not mass.

D: The answer to this question is D if the word at the end is balance.

Answer:

0.11M

Explanation:

What is the Molarity of a Ca(OH)2 solution if 30.0mL of

the solution is neutralized by 26.4mL of 0.25M HCI solution?

1L (1000 ml) of the HCl contains 0.25 moles of H ion

26.4 ml contains ( 26.4 X0.25/1000) moles of H ion ion

=0.0066 moles H ion

2HCl +Ca (OH)2-----> 2H2O +CaCl2

SO 2 H IONS NEUTRALIZE 1 Ca(OH)2 MOLECULE

00066 moles H ion neutralize 0.0033 moles Ca(OH)2

the 0.0033 moles are distributed over 30 ml, so the concentration of the

Ca(OH)2 IS 0,0033/(30/1000) =0.11 moles/liter or 0.11M

The statement that is incorrect about ionic compounds is: "ionic bonds involve the sharing of electrons by metals and nonmetals."

Ionic bonds are not formed by the sharing of electrons, but rather by the transfer of electrons from a metal to a nonmetal. The metal loses one or more electrons to form a positive ion (cation), and the nonmetal gains those electrons to form a negative ion (anion). The attraction between these opposite charges forms the ionic bond and holds the ionic compound together.

All the other statements are correct:

Ionic compounds include table salt (NaCl), calcium carbonate (CaCO3), and sodium bicarbonate (NaHCO3).

Ions are formed when ionic solids dissolve in water.

Between metals and nonmetals, ionic bonds form.

The attraction of positive and negative ions holds ionic compounds together.

Learn more about  ionic compounds here:

https://brainly.com/question/29005103

#SPJ4

Answer:

each element gains one proton as you move from left to right across a period, atomic number is the number of protons

careful not to confuse it with the mass number which is the number of protons and neutrons.

also remember that in any given element, the proton number is always equal to electron number as they have opposite charges that cancel off, this is why elements are neutral.

All are three factors are affected by an increase in reactant concentration.

a. The number of reactant particles in a given volume

b. The number of reactant collisions

c. The rate of reaction

The number of collisions over time determines the reaction rate; when the concentration of either reactant is increased, more collisions occur, leading to more successful collisions and reaction rate. Collisions multiply as temperature rises. The pace of a reaction will increase when a reactant's concentration rises because more reactants will collide more rate of reaction.

learn more about rate of reaction here:

https://brainly.com/question/24795637

#SPJ4

Answer:

a molecule of an element is called atomicity

Answer: 20 , 40

I want know the answer now !

To prevent coastal erosion and land deterioration in coastal areas, various technological procedures and engineering solutions can be employed. These include beach nourishment, constructing seawalls and revetments, building breakwaters and groins, implementing dune restoration, establishing offshore reefs, and considering managed retreat.

Beach nourishment involves adding sand to eroded beaches, while seawalls and revetments act as barriers against waves.

Breakwaters and groins disrupt wave energy, dune restoration utilizes vegetation and dunes for protection, offshore reefs dissipate wave energy, and managed retreat involves relocating infrastructure.

These solutions collectively work to safeguard coastal areas, mitigate erosion, and preserve the land from degradation and damage.

To know more about coastal erosion, refer here:

https://brainly.com/question/33096410#

#SPJ11

Answer:

591.471 MILLIMETERS

Explanation:

Formula  

for an approximate result, multiply the volume value by 29.574

29.574*20=591.471

If you think this has helped you please consider brainly, thank you, or rate.

Miss Hawaii ; )

Neoclassical economics focuses on supply and demand as the driving forces behind the production and consumption of goods and services.

It should be noted that Neoclassical economics emphasizes the choices of consumers. Thus, in neoclassical economics, the value of products and services is above the costs of production.

Hubbert's peak theory states that the rise, peak, and decline of fossil fuel production with revolutions in new technology will be longer than originally predicted before the oil reserves run out

The tragedy of the commons is an economic problem of overconsumptio, and depletion of a common pool resource

One thing that puts tremendous pressure on our biodiversity and natural resources is an ever-growing demand for resources by a growing population.

Learn more about economics on:

https://brainly.com/question/17996535

#SPJ1

Answer:

1. Neoclassical economics focuses on supply and demand as the driving forces behind the production and consumption of goods and services.

2. It should be noted that Neoclassical economics emphasizes the choices of consumers. Thus, in neoclassical economics, the value of products and services is above the costs of production.

3. Hubbert's peak theory states that the rise, peak, and decline of fossil fuel production with revolutions in new technology will be longer than originally predicted before the oil reserves run out

4. The tragedy of the commons is an economic problem of overconsumptio, and depletion of a common pool resource

5. One thing that puts tremendous pressure on our biodiversity and natural resources is an ever-growing demand for resources by a growing population.

The balanced chemical equation for the reaction between carbon (C) and oxygen (O2) to form carbon monoxide (CO) and carbon dioxide (CO2) is below and the moles of CO2 produced is 0.117.

C + O2 → CO + CO2

According to the equation, for every 1 mole of C, we need 1 mole of O2 to produce 1 mole of CO and 1 mole of CO2.

Given that we have 0.155 moles of C and 0.117 moles of O2, we can use the mole ratio from the balanced equation to determine how many moles of CO2 could be produced:

Moles of CO2 = Moles of C = 0.155 moles

Therefore, based on the moles of each reagent, we could produce a maximum of 0.155 moles of CO2.

To determine the limiting reagent, we need to calculate the amount of CO2 that would be produced if all of the limiting reagent were consumed. We can do this by comparing the amount of CO2 that would be produced by each reagent and identifying the one that produces the smaller amount:

Using C as the limiting reagent:

Moles of CO2 produced = Moles of C = 0.155 moles

Using O2 as the limiting reagent:

Moles of CO2 produced = Moles of O2 × (1 mole CO2 / 1 mole O2) = 0.117 moles × (1 mole CO2 / 1 mole O2) = 0.117 moles

Since the amount of CO2 produced by the reaction with C is greater than the amount produced by the reaction with O2, we can conclude that O2 is the limiting reagent for this problem. Therefore, only 0.117 moles of CO2 could be produced based on the available amount of O2, and any excess C would be left over after the reaction.

Learn more about Balanced chemical equations here:

brainly.com/question/28294176

#SPJ4

Along the diverging boundary, a deep valley known as a rift valley develops.

A valley is a long, low terrain that frequently stretches between hills or mountains. It usually has a river or stream that flows from one end to the other.

The majority of valleys are created by rivers or streams eroding the land's surface over a very lengthy period of time.

A valley is a low area of ground between hills, particularly one through which a river flows.

In "triple junctions," a type of divergent boundary where three tectonic plates collide at angles of around 120°, several rift valleys are found.

Thus, along the diverging boundary, a deep valley known as a rift valley develops

To learn more about valley, refer to the link below: https://brainly.com/question/28208543

# SPJ1

Answer:

Joule is the SI unit of work. 1 Joule is amount of work done when a force of 1 Newton displaces a body through a distance of 1m in the direction of the force applied.