what are all of the elements that end with F electrons

a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas. These density differences result in rising and/or falling currents, which are the key characteristics of a convection cell. When a volume of fluid is heated, it expands and becomes less dense and thus more buoyant than the surrounding fluid. The colder, denser part of the fluid descends to settle below the warmer, less-dense fluid, and this causes the warmer fluid to rise. Such movement is called convection, and the moving body of liquid is referred to as a convection cell.

Final answer:

Air density impacts movement in convection cells, with warm, less dense air rising and cool, denser air sinking, creating a cycle that drives convection currents and influences weather patterns.

Explanation:

The density of air affects its movement in a convection cell because warm air that is less dense rises, while cooler, denser air sinks. This movement of air due to differences in density is what drives convection currents. As a fluid, such as air, is heated, it expands, becoming less dense than the surrounding fluid. This decrease in density results in buoyancy, causing the air to rise. At higher elevations or as the air mass expands and comes into contact with cooler environments, it loses heat, becomes denser and hence sinks back down, creating a convection cell, as seen in phenomena such as Hadley cells and local weather patterns like thunderstorms. In essence, the difference in density affected by the temperature is responsible for the movement of air within these cells, transferring energy from one place to another.

Answer:

both drop downs are 1000

Explanation:

According to the law of conservation of energy, 1000 kilojoules of electric energy are transformed into  1000 kilojoules of kinetic energy.

According to law of conservation of energy , it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer  in the year 1812.

Learn more about law of conservation of energy,here:

https://brainly.com/question/29775341

#SPJ3

Answer: Energy locked in the nucleus of an atom

Explanation:

Nuclear energy is an energy which binds the constituents of nucleus of an atom together.

There are two types of nuclear reaction from which nuclear energy is produced:

A option is correct answer   .

Answer:

A. three dimensions

Explanation:

Crystal lattice have a three dimensional array of repeating units. For example, in the NaCl crystal the repeating units are the Na⁺ and Cl⁻ ions. The Na⁺ and Cl⁻ ions are arranged alternately along the x, y and z axis. The smallest repeating unit of a cell is called unit cell. Crystal lattice have a definite geometry which is because of this rigid array of unit cells.

The granite block transferred 4080 J of energy, and the mass of the water is 35.8 g.

1. Energy from granite block

The formula for the heat (q) transferred is

q = mCΔT

m = 126.1 g; C = 0.795 J·°C⁻¹g⁻¹; ΔT = T_f – T_i = 51.9 °C - 92.6 °C = -40.7 °C

∴ q = 126.1 g × 0.795 J·°C⁻¹g⁻¹ × (-40.7 °C) = -4080 J

The granite block transferred 4080 J.

2. Mass of water

q = mCΔT

m = q/(CΔT)

q = 4080 J; C = 4.186 J·°C⁻¹g⁻¹; ΔT = T_f – T_i = 51.9 °C – 24.7 °C = 27.2 °C

∴ m = 4080 J/(4.186 J·°C⁻¹g⁻¹ × 27.2 °C) = 35.8 g

The mass of the water is 35.8 g.

The granite block transferred 4,080 joules of energy, and the mass of the water is 35.8 grams.

Heat transfer in any system can be calculated as follow:

q = mCΔT

Heat transfer by the granite block is calculated as follow:

q = mCΔT, where

m = mass of granite = 126.1 g (given)

C = specific heat of granite = 0.795 joules/gram degree Celsius (given)

ΔT = change in temperature of granite = 51.9 °C - 92.6 °C = -40.7 °C (given)

Putting all these values in the above equation, we get

q = 126.1 × 0.795 × -40.7 = -4080 J

Now by using the above formula, we can also calculate the mass of water in the following way:

m = q / CΔT, where

C = specific heat of water = 4.186 joules/gram degree Celsius (given)

ΔT = change in temperature of water = 51.9 °C – 24.7 °C = 27.2 °C

Putting all these values in the above equation, we get

m = -4080 /  4.186 × 27.2 = 35.8 g.

Hence, 4,080 joules of energy is transferred by granite block and 35.8 g is the mass of water.

To learn more about heat transfer, visit the below link:

https://brainly.com/question/18980657

Answer is D.

Among the given options, the products of equation A, B and C are aqueous solutions. Those are indicated by using (aq).

The balanced equation for the reaction between Li₂CO₃(aq) and FeCl₂(aq) is Li₂CO₃(aq) + FeCl₂(aq) → 2LiCl(aq) + FeCO₃(s)

LiCl is a salt while FeCO₃ is a Grey/green color precipitate. Hence, option D represents a precipitation reaction.

Answer:

plato / edmentum

Explanation:

The average atomic mass of your mixture is 1.03 u .

The average atomic mass of H is the weighted average of the atomic masses of its isotopes.  

We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its % abundance).  

Thus,  

0.99    × 1.01 u = 0.998 u

0.002 × 2.01 u = 0.004 u

0.008 × 3.02 u = 0.024 u

            TOTAL =  1.03   u

c +o 2 = co 2 i think....hopefully its not wrong

Answer: Polar bonds

Carbon (C) has 4 electrons in the valence electrons whereas chlorine has 7. Each carbon and chlorine (Cl) will form a polar covalent bond.

Non polar bonds, develop where two atoms share a pair of electrons with each other. Hence they are known as Non-polar covalent bonds and they have equal electronegativities

In polar bonds, the electrons are shared unequally between the atoms which as a result increases the electronegativity difference which makes it ionic.

The bond is polar bond.

So the bond is C—Cl is polar. Carbon is partial positive while chlorine is partial negative.

There are at least 60 elements in our bodies.

Other elements may be present, but in such small quantities that we cannot detect them with current technologies.

The six most abundant elements (by mass) in our bodies are:

Oxygen           65    %

Carbon            18    %

Hydrogen       10    %

Nitrogen          3.2 %

Calcium           1.4 %

Phosphorus    1.1  %

TOTAL =      99     %

Final answer:

The law of conservation of mass implies that the mass remains constant in closed systems, during both physical and chemical changes. Therefore, when 18 mL of liquid water vaporizes to 22 L of water vapor, the mass remains unchanged despite the change in volume.

Explanation:

Law of Conservation of Mass

The law of conservation of mass states that the mass of a closed system must remain constant over time, as system mass cannot change quantity if it is not added or removed. During physical and chemical changes, matter can change form, such as from a liquid to a gas, but the mass of the system remains the same. This means that if 18 mL of liquid water vaporizes to form about 22 L of water vapor, the mass of the water vapor will still be equal to the mass of the liquid water prior to vaporization.

Example of Conservation of Mass

In the example provided, when water is heated and changes from a liquid to a gas, it expands greatly in volume, but the total mass remains unchanged. Although 18 mL of water becomes 22 L of water vapor, this physical change does not result in a loss or gain of mass. This illustrates that during vaporization, a physical change, the law of conservation of mass is obeyed.

The mass of the water remains constant at 18 grams before and after vaporization, in accordance with the law of conservation of mass.

The law of conservation of mass states that mass cannot be created or destroyed in an isolated system during a physical or chemical change. This means that the total mass of the reactants in a chemical reaction must equal the total mass of the products. Similarly, when a physical change occurs, such as a change of state, the mass remains constant.

In the given scenario, 18 mL of liquid water vaporizes to form approximately 22 L of water vapor. To apply the law of conservation of mass, we need to consider the mass of the water before and after vaporization, not the volume. The density of water is approximately 1 gram per milliliter, so 18 mL of liquid water has a mass of about 18 grams.

When water vaporizes, it undergoes a phase change from liquid to gas, expanding in volume as it becomes less dense. However, the number of water molecules does not change during this process, and since mass is a measure of the amount of matter, the mass of the water vapor will be the same as the mass of the original liquid water.

Therefore, even though the volume of the water changes dramatically from 18 mL to 22 L, the mass of the water remains constant at 18 grams, in accordance with the law of conservation of mass. The volume increase is due to the water molecules spreading out to fill the available space as a gas, but the total mass of the water molecules themselves does not change.

Answer:

The water molecules slow down, stronger attractions form between them, and the molecules are pulled closer together.

Explanation:

In solids the packing of the particles is closer and tighter thus increasing the intermolecular attraction. This makes solids rigid with a definite shape, size and volume. On the other hand in liquids the packing of the particles is loose thus decreasing the intermolecular attraction. This makes liquids able to flow, and takes the shape and volume of the container in which they are placed.

The correct description of the change when liquid water turns into solid ice in a freezer is:

The water molecules slow down, bonds are broken, and the separated atoms spread out. (first option)

Something interesting about water is that the solid state (ice) has a larger volume than the liquid one.

The expansion of ice compared to liquid water is due to the formation of an open, hexagonal crystal lattice in the solid ice structure, which results in ice having a lower density than liquid water. This expansion is related to the hydrogen bonds between water molecules, which create a network that pushes the molecules apart in the solid state, making ice less dense.

So, to accurately describe the change when liquid water turns into solid ice:

The water molecules slow down, stronger hydrogen bonds form between them, and the molecules are arranged in a hexagonal crystal lattice, causing ice to have a larger volume than liquid water.

The correct option would be the first one.

Learn more about changes of phase at:

https://brainly.com/question/29712919

#SPJ4

146 is the net force I love ur pic btw.

The answer is 200N to the left

Answer: Mass is neither lost nor gained during a chemical change.

Explanation:

Antoine Lavoisier’s Law of Conservation of Mass:

'In a chemical reaction the mass can neither be created and nor be destroyed'.

In a chemical reaction the mass of reactants is equal to the mass of products which means that the mass remain conserved.

For Example: In a chemical reaction:

[tex]2H_2+O_2\rightarrow2H_2O[/tex]

Mass of reactants = Mass of products

Mass of hydrogen molecule + mass of oxygen molecule = Mass of water

[tex]2\times (1)(2)+ 1\times (16)(2)= 2\times((1)(2)+(16)(1))=36[/tex]

From this we can see that the mass remains conserved in the chemical reaction.

Antoine Lavoisier's experiments fundamentally transformed the field of chemistry, particularly through his work on the law of conservation of mass.

Antoine Lavoisier's demonstrated that mass is neither created nor destroyed in chemical reactions, leading to the understanding that the total mass of reactants equals the total mass of products. This was a groundbreaking realization, as it contradicted the then-prevalent phlogiston theory, which posited that substances contained a fire-like element.

Lavoisier also played a crucial role in identifying and naming elements, distinguishing between elements and compounds, and introducing a systematic chemical nomenclature. His careful measurements during experiments laid the groundwork for quantitative analysis in chemistry. By meticulously weighing reactants and products, he provided strong evidence for the conservation of mass, which is a foundational principle in modern chemistry.

Final answer:

Dan most likely described a liquid state of matter because the particles are in constant contact, can move around each other, and don't bounce off, unlike in a gas. This movement is due to the relatively strong intermolecular forces that are characteristic of liquids.

Explanation:

Based on Dan's description of particles that 'move around each other but do not bounce off,' he is likely describing the liquid state of matter. In a liquid, the particles are close enough to experience strong intermolecular interactions, which usually keep the particles contained within the liquid boundary. However, unlike solids, the particles within a liquid are not fixed in position and have the ability to move around and flow, thus allowing them to take the shape of their container while maintaining a definite volume. Liquids are characterized by the ability of particles to slide past one another, which differentiates them from the fixed positions of particles in a solid and the free, independent movement of particles in a gas.

Metals have the property of being shiny. Tellurium is a metal and belongs to the metallic region of the periodic table. Solid nonmetals are brittle, and most nonmetals are poor conductors of electricity.

The property that most metals have in common is that they are shiny. This is due to the way metals reflect light. Metals have free electrons that are able to move around, creating a smooth and shiny surface.

Tellurium is a silvery-white, brittle element that belongs to the metals region of the periodic table.

Most of the elements located directly to the right of the metalloids in the periodic table are nonmetals.

The property that most solid nonmetals have in common is that they are brittle. Nonmetals tend to be brittle because they lack the metallic bonding that gives metals their strength and ductility.

A property that most nonmetals have in common is that they are poor conductors of electricity. Nonmetals do not have free electrons like metals, so they are not able to conduct electricity as well.

Learn more about Metals here:

https://brainly.com/question/36500969

#SPJ6

No. water itself cannot be wet it makes things wet but because water molecules are already water it cannot make itself wet so in other words water makes things wet but its not exactly wet itself.

water is not wet because it is a liquid that wet things once you come in contact with water you become wet until then water is liquid and you stay dry

Cake batter is not a pure substance but rather a mixture because it is made of different ingredients like flour, sugar, and eggs that retain their original properties even when mixed together.

Cake batter is not a pure substance, but rather a mixture. In Chemistry, a pure substance is an elemental or compound matter with constant composition and properties throughout. This means it's made up of a single type of particle, like gold (element) or water (compound), which can't be separated into other kinds of matter by physical means.

On the other hand, a mixture consists of two or more different substances which are mixed but not combined chemically.

In cake batter, one can find flour, sugar, eggs, and other ingredients that retain their original properties even when mixed together to make the batter. Therefore, we can classify cake batter as a mixture.

https://brainly.com/question/35868674

#SPJ6

The answer is all elements are balanced.

Answer: This is a balanced equation

An easy way to figure out if the equation is balanced or not is that each element in the R.H.S should be equal to the element in the L.H.S

R.H.S                       L.H.S

Mg = 1                     Mg = 1

O = 1                       O = 1                                              

Li = 2                       Li = 2

Cl = 2                      Cl = 2

As both of them have equal number of elements they are balanced.

calcium,phosphorus,potassium,and sulfer

Answer:

Carbon and oxegyn

Explanation:

A specific heat capacity of 0.135 J·°C⁻¹g⁻¹ means that it takes 0.135 J of energy to change the temperature of 1 g of gold by 1 °C.

Answer.1  B

Explanation:

Student's proposed procedure includes repetitions because in his procedure he had mentioned that he had repeated the same experiment by making his sister wear different diapers from another four brands after each hour. And also repeated the same whole experiment for a week.

Answer.2 D

Explanation:

Procedure is not replicable as there were many independent and dependent factors which cannot  be replicated.

Answer:

B

Explanation:

Hey there!:

Given the reaction:

CaCO3(s) + H2SO4(aq) -------> CaSO4(s) + CO2(g) + H2O(l)

volume in liters( H2SO4 )  = 100 mL / 1000 => 0.1 L

Moles of H2SO4:

Molarity * Volume ( L )

0.100 * 0.1 => 0.01 moles of H2O4

1 mole H2SO4 reacted with -------------- 1 mole  CaCO3

0.01 moles H2SO4 reacted with ------- 0.01 moles CaCO3

Molar mass CaCO3 = 100.0869 g/mol

Mass of CaCO3 :

Moles of CaCO3 * Molar mass CaCO3

0.01 * 100.0869 => 1.000869 g of CaCO3

Therefore:

% mass =  ( Mass of CaCO3 /  mass of sample ) * 100

% mass =  ( 1.000869 / 5.00 ) * 100

% mass = 0.2001738 * 100

% mass = 20.01%

Hope that helps!

Magnesium AR: 150 pm

Chlorine AR: 100 pm

1. 5,400 inches to miles: 0.085227 miles.

2. 16 weeks to seconds: 8,966,400 seconds.

3. 54 yards to mm: 49,381.76 mm.

4. 36 cm/sec to mph: 0.080502 mph.

using the dimensional analysis-

1. 5,400 inches to miles:

5,400 inches * (1 foot / 12 inches) * (1 mile / 5,280 feet) = 0.085227 miles.

2. 16 weeks to seconds:

16 weeks * 7 days/week * 24 hours/day * 60 minutes/hour * 60 seconds/minute = 8,966,400 seconds.

3. 54 yards to mm:

54 yards * 3 feet/yard * 30.48 cm/foot * 10 mm/cm = 49,381.76 mm.

4. 36 cm/sec to mph:

36 cm/sec * (1 foot / 30.48 cm) * (1 mile / 5,280 feet) * (3600 sec / 1 hour) = 0.080502 mph.

To know more about miles:

brainly.com/question/17678309

#SPJ3

The complete question is -Dimensional Analysis Worksheet Set up and solve the following using dimensional analysis.

1 mile = 5,280 ft 1 inch = 2.54 cm

3 feet = 1 yard 454 g = 1lb

946 ml 1 qt 4 qt=1 gal

1) 5,400 inches to miles

2) 16 weeks to seconds

3) 54 yards to mm

4) 36 cm/sec to mph

The best explanation for the flow of energy in the food web is:

Plants → Squirrel → Snake → Mushrooms

Third option is correct.

In this food web, energy flows from plants to squirrels, then from squirrels to snakes, and finally from snakes to mushrooms. This flow of energy represents the transfer of energy through different trophic levels.

1. Plants (primary producers) capture energy from the sun through photosynthesis and convert it into food energy (carbohydrates).

2. Squirrels (primary consumers) eat plants to obtain the energy stored in them.

3. Snakes (secondary consumers) eat squirrels, obtaining the energy stored in the squirrel's body.

4. Mushrooms (decomposers) break down the remains of the snake and other dead organisms, releasing nutrients and energy back into the ecosystem.

Each step in the food web represents a transfer of energy from one organism to another, and the direction of energy flow is from the source of energy (plants) through various consumers and eventually to decomposers.

To know more about food web

https://brainly.com/question/30062179

#SPJ2

The next step is C

It isn't A because it is not an emergency

B is for spills I believe

D  is wrong because using her hands could be dangerous as she may cut herself.

A is automatically out! since you can't put liquid on an electronic balance.

D.is also out! the most you can do with a meter stick is see how high the water is.

C. IS wrong A measuring cup is closer but not what were looking for.

the answer is B.Graduated Cylinder!

Answer:

It is the graduated cylinder

Explanation: