what is the concept of the doppler effect?

Answer:

Aquatic life

Elevation

Salinity

Temperature

Explanation:

Aquatic life- animals living in water use up dissolved oxygen.

Elevation- the amount of oxygen in elevation increases.

Salinity- Salty water holds less oxygen than fresh water.

Temperature- cold water holds more dissolved oxygen than warm water.

Atoms exchange or share electrons during bonding to obtain stability by completing their valence shells and also to achieve a lower energy state.

Atoms exchange or share electrons during bonding because of the force of attraction between two oppositely charged ions or particles called the electrostatic force. This force of attraction results in the formation of a bond, holding two atoms together within a compound.

The electrons are either shared or exchanged because they determine the chemical reactivity of an atom and are responsible for forming bonds between atoms. Atoms bond with each other to complete their outer shells and obtain stability, which is usually achieved by acquiring eight electrons in their valence shells. This is known as the octet rule.

The main types of chemical bonds that atoms form include covalent bonds and ionic bonds. Covalent bonds involve the sharing of electrons between atoms, while ionic bonds involve the transfer of electrons from one atom to another. Ionic bonding occurs between atoms that have a large difference in electronegativity, whereas covalent bonding occurs between atoms with a small difference in electronegativity.

In conclusion, atoms exchange or share electrons during bonding to obtain stability by completing their valence shells and also to achieve a lower energy state.

Learn more about electrons

https://brainly.com/question/12001116

#SPJ11

Answer:42 atoms at least

42

Explanation:

1234567912345678912345678912345678

Answer:

Covalent bond

Explanation:

(pls give me brainliest) <3

When the system reaches thermal equilibrium, the temperature will be closest to 20°C.

To determine the final temperature when the iron pellet is dropped into water, we can use the principle of heat transfer. The heat lost by the iron pellet will be equal to the heat gained by the water.

The heat lost by the iron pellet can be calculated using the equation:

Q_iron = m_iron * c_iron * ΔT_iron

where m_iron is the mass of the iron pellet, c_iron is the specific heat capacity of iron, and ΔT_iron is the change in temperature of the iron pellet.

The heat gained by the water can be calculated using the equation:

Q_water = m_water * c_water * ΔT_water

where m_water is the mass of the water, c_water is the specific heat capacity of water, and ΔT_water is the change in temperature of the water.

Since the total heat lost by the iron pellet is equal to the total heat gained by the water, we can set up the equation:

Q_iron = Q_water

m_iron * c_iron * ΔT_iron = m_water * c_water * ΔT_water

Substituting the given values:

(50 g) * (specific heat capacity of iron) * (final temperature - 200°C) = (50 g) * (specific heat capacity of water) * (final temperature - 20°C)

Since the specific heat capacity of water is approximately 10 times that of iron, we can assume that the specific heat capacity of iron is negligible compared to that of water. Therefore, we can approximate the equation as:

50 * (final temperature - 200) ≈ 500 * (final temperature - 20)

Simplifying the equation:

final temperature - 200 ≈ 10 * (final temperature - 20)

final temperature - 200 ≈ 10 * final temperature - 200

200 - 20 ≈ 10 * final temperature - final temperature

180 ≈ 9 * final temperature

final temperature ≈ 180 / 9

final temperature ≈ 20°C

Learn more about specific heat capacity, here:

https://brainly.com/question/1105305

#SPJ1

Answer:

Element

Explanation:

It's C4 so there are four carbons.

Hope this helped! :))

Molecules are the smallest chemical units of matter that retain the chemical properties of a substance. They are formed by the combination of two or more atoms held together by chemical bonds, either through sharing or transfer of electrons.

For such more question on chemical properties

https://brainly.com/question/2020832

#SPJ8

Answer:

Different elements emit differently colors of light because when electrons return to the lower energy levels, they emit energy in a different form of light

Explanation:

In chloroplasts, water molecules are split during a process called photolysis. Photolysis occurs in the thylakoid membranes of the chloroplasts, specifically in the thylakoid lumen. The splitting of water molecules releases oxygen atoms, electrons, and free hydrogen ions (protons).

During the light-dependent reactions of photosynthesis, light energy is absorbed by chlorophyll molecules in the chloroplasts. This excites electrons in the chlorophyll, which then pass through a series of electron carriers in the thylakoid membrane. As the excited electrons move through this electron transport chain, they lose energy, which is used to pump protons (hydrogen ions) from the stroma (the fluid-filled space outside the thylakoid membrane) into the thylakoid lumen.

To replenish the lost electrons, water molecules are split by an enzyme called photolysis. Photolysis breaks the water molecules into oxygen atoms, electrons, and free hydrogen ions. The oxygen atoms combine to form molecular oxygen (O2), which is then released as a byproduct. The electrons released during photolysis replace the ones that were lost in the chlorophyll molecules, allowing them to continue absorbing light energy.

The free hydrogen ions (protons) generated during photolysis accumulate in the thylakoid lumen. These protons create a concentration gradient across the thylakoid membrane. The gradient is then used to generate ATP (adenosine triphosphate), the energy currency of cells, through a process called chemiosmosis.

Water molecules are split during photolysis in the thylakoid membranes of chloroplasts. This process releases oxygen atoms, electrons, and free hydrogen ions, which play crucial roles in the light-dependent reactions of photosynthesis.

Learn more about thylakoid lumen here:-

https://brainly.com/question/29910816

#SPJ11

Answer:

Explanation:

Answer:The structure of solids can be described as if they were three-dimensional analogs of a piece of wallpaper. Wallpaper has a regular repeating design that extends from one edge to the other. Crystals have a similar repeating design, but in this case the design extends in three dimensions from one edge of the solid to the other.

We can unambiguously describe a piece of wallpaper by specifying the size, shape, and contents of the simplest repeating unit in the design. We can describe a three-dimensional crystal by specifying the size, shape, and contents of the simplest repeating unit and the way these repeating units stack to form the crystal.

The simplest repeating unit in a crystal is called a unit cell. Each unit cell is defined in terms of lattice points--the points in space about which the particles are free to vibrate in a crystal.

Answer:

pH is not been modified. No changes.

Explanation:

Our buffer is made of acetic acid, a weak one and the salt from its conjugate base, sodium acetate.

NaC₂H₃O₂ → Na⁺   +  C₂H₃O₂⁻

The acetate anion can make hydrolisis in water to produce acetic acid again.

C₂H₃O₂⁻  + H₂O  ⇄  C₂H₃O₂H + OH⁻     Kb

KCl is neutral salt. When we dissociate it:

KCl → K⁺  +  Cl⁻

Both ions come from a strong base and a strong acid. They won't make hydrolisis in water because they are conjugate weak acid and base

K⁺ + H₂O ← KOH + H⁺

Cl⁻ + H₂O ← HCl + OH⁻

These reactions can't be possible.

That's why it doesn't occur anything in our buffer, this salt does not give OH⁻ or H⁺ to medium to modify pH

It takes 4 moles of potassium chlorate to make 6 moles of oxygen gas.

Due to the fact that there will only be 1 chemical present, this indicates that approximately 2 moles of KCL03 will disintegrate. It will break down into two moles of KCL and three moles of oxygen.

We can observe that three moles of oxygen are created from two moles of potassium chlorate. As a result, we can say that 1.9684 g of oxygen will be created during the entire breakdown of 5 g of $KClO 3$.

To know more about potassium chlorate visit:-

brainly.com/question/488887

#SPJ1

The statement about the inequality that is NOT true is (A), a and b may be equal to each other.

This is because the inequality y> x-4 means that y must be greater than x-4. If a and b are equal, then y = x-4, which means that the inequality is not satisfied.

The other three statements are true because:

If 4 is subtracted from a, it will be greater than b because y> x-4 means that y must be greater than x.

If 4 is subtracted from b, it will be less than a because y> x-4 means that y must be greater than x.

If 4 is subtracted from both a and b, the inequality will still be true because y> x-4 means that y must be greater than x, even if x and b are both decreased by 4.

Therefore, the answer to the question is the statement a and b may be equal to each other.

Find out more on inequality here: https://brainly.com/question/25275758

#SPJ1

Complete question:

Guided Learning ar Inequalities in One Variable - Item 7601

Pre-Quiz

Practice

from a, it will be greater than b.

Post-Quiz

Finish

If the ordered pair (a, b) satisfies the inequality y> x-4, three of these statements are true. Which statement is NOT true?

a and b may be equal to each other.

If you subtract 4 from a, it will be greater than b.

If you subtract 4 from b, it will be less than a.

If you subtract 4 from both a and b, the inequality will still be true.

Answer:

look at the attachment I wrote it out for you.

Answer:

The higher the activation energy, the slower the chemical reaction will be.

Explanation:

your welcome

Answer:

The activation energy of a chemical reaction is closely related to its rate. Specifically, the higher the activation energy, the slower the chemical reaction will be. This is because molecules can only complete the reaction once they have reached the top of the activation energy barrier.

Explanation: Each and every chemical reaction require some amount of activation energy to begin. The activation energy enables the reactants to move and overcome forces of repulsion. The subsequent collisions between atoms facilitates the breaking of existing bonds and the formation of new ones.

Answer:

either it keeps humans alive or either generates oxygen for the world

Explanation:

Answer:.

Explanation:

Among the given radicals, R3C is the most stable radical, while CH3 is the least stable radical.

Stability of radicals is influenced by factors such as electron delocalization, hyperconjugation, and steric hindrance. In this case, R3C (tertiary radical) is the most stable radical due to the presence of three alkyl groups attached to the carbon atom. The alkyl groups provide electron-donating inductive effects and allow for efficient electron delocalization, which stabilizes the radical.

On the other hand, CH3 (methyl radical) is the least stable radical. It has only one alkyl group attached to the carbon atom, limiting the electron-donating inductive effects and electron delocalization. As a result, the methyl radical is less stable compared to the other radicals provided.

RCH2 (secondary radical) and R2CH (primary radical) have intermediate stability between R3C and CH3. The number of alkyl groups attached to the carbon atom affects the stability, with more alkyl groups providing greater stabilization through electron delocalization.

Therefore, among the given radicals, R3C is the most stable radical, while CH3 is the least stable radical.

Learn more about radicals here:

https://brainly.com/question/28851005

#SPJ11

When a radioactive source is in front of a plate of aluminum foil. On the opposite side, radiation of two different sorts is found. There won't be any indication of the alpha particle radiation.

A known volume of a radionuclide that emits ionizing radiation—typically gamma radiation, alpha particles, beta particles, including neutron radiation—is referred to as a radioactive source.

The NHS, paper and steel manufacture, food irradiation, medical sterilization, the construction industry, and oil and gas exploration are just a few of the businesses that heavily utilize radioactive sources.

To know more about radioactive source visit :

https://brainly.com/question/12741761

#SPJ4

Explanation:

Chemical weathering is most effective when water is present.

Answer: The baking of a pizza should be categorized as an endothermic process because the dough absorbs heat. An endothermic process is a method that absorbs energy from its surroundings which is habitually in the form of energy

Explanation:

Answer:

endothermic; the dough absorbs heat

Explanation:

EDG2020

Type of wave does the illustration depict is longitudinal wave.

The longitudinal wave can be defined as the displacement of particles of medium is in the same direction as the the direction of the travelling wave.

Longitudinal wave formula is given as :

y(x,t) =y' cos [ w(t-x/c) ]

were , y is the displacement

x is the distance between the travelled point

t is the time

y' is the amplitude

c is the speed of wave

w is the angular frequency

The transverse wave are the wave in which the particles of medium travel perpendicularly to the direction of the wave.

The surface wave is the combination of longitudinal wave and the transverse wave.

Thus, Type of wave does the illustration depict is longitudinal wave.

To learn more about Longitudinal wave here

https://brainly.com/question/14188258

#SPJ1

In this question, we have to calculate the theoretical yield of AlCl3, based on the following reaction:

2 Al + 3 Cl2 -> 2 AlCl3

In this reaction, we have the following molar ratios:

2 Al = 3 Cl2

2 Al = 2 AlCl3

3 Cl2 = 2 AlCl3

We have as the initial mass of the reactants:

1.0 grams of Al and 1.0 grams of Cl2

We need to find the limiting and excess reactants before the theoretical yield, and in order to find the limiting and excess reactants, we need to calculate the number of moles we have in 1.0 grams of each

Starting with Al, the molar mass of Al is = 27g/mol

27g = 1 mol of Al

1.0g = x moles of Al

27x = 1

x = 0.37 moles of Al in 1 gram of Al

According to the molar ratio between Al and Cl2, 2 moles of Al = 3 moles of Cl2, what if we have 0.37 moles of Al:

2 Al = 3 Cl2

0.37 Al = x Cl2

2x = 1.11

x = 1.11/2

x = 0.55 moles of Cl2 will be needed to react with 0.37 moles of Al

The molar mass of Cl2 is 70.9g/mol:

70.9g = 1 mol of Cl2

1.0g = x moles

70.9x = 1

x = 1/70.9

x = 0.014 moles

We have 0.014 moles of Cl2 in this reaction, and we needed 0.55 moles of Cl2, which means that Cl2 is the limiting reactant and Al is in excess

Using the number of moles of the limiting reactant, 0.014 moles, we will find the final mass of the product

First we need to know how many moles of AlCl3 we have, based on the molar mass between Cl2 and AlCl3, 3:2

3 Cl2 = 2 AlCl3

0.014 Cl2 = x AlCl3

3x = 0.028

x = 0.028/3

x = 0.009 moles of AlCl3

Now we have the number of moles of AlCl3, the molar mass is = 133.34g/mol

133.34g = 1 mol

x grams = 0.009 moles of AlCl3

x = 0.009 * 133.34

x = 1.20 grams of AlCl3

The theoretical yield of AlCl3 for 1.0 gram of Al and 1.0 gram of Cl2 will be 1.20 grams

Answer:

The evidence of matter scattering light wave in many different directions is;

D. The colors on the water's surface match the colors in the sky

Explanation:

Light scattering is used to describe the sending of a given beam of light in many directions (by tiny particles) when the light passes through a medium, due to the disruption of the bath of the light ray as it bumps into the tiny particles

Water has the nature of absorbing the red light. The light that enters the water is scattered by the tiny particles in the water such that the blue light which is the spectrum of light water allows to pass through is reflected along with the reflection of the sky and the colors of the water surface match the colors of the sky.

Answer:

C.

Explanation:

I took the quiz

Answer:

Ammonia is limiting reactant

Amount of oxygen left  = 0.035 mol

Explanation:

Given data:

Masa of ammonia = 2.00 g

Mass of oxygen = 4.00 g

Which is limiting reactant = ?

Excess reactant's amount left = ?

Solution:

Balance chemical equation:

4NH₃ + 3O₂     →     2N₂ + 6H₂O

Number of moles of ammonia:

Number of moles = mass/molar mass

Number of moles = 2.00 g/ 17 g/mol

Number of moles = 0.12 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 4.00 g/ 32 g/mol

Number of moles = 0.125 mol

Now we will compare the moles of ammonia and oxygen with water and nitrogen.

                       NH₃          :            N₂

                         4             :             2

                       0.12           :           2/4×0.12 = 0.06

                       NH₃         :            H₂O

                         4            :             6

                         0.12       :           6/4×0.12 = 0.18

                        O₂            :            N₂

                         3             :             2

                       0.125        :           2/3×0.125 = 0.08

                         O₂           :            H₂O

                         3              :             6

                         0.125       :           6/3×0.125 = 0.25

The number of moles of water and nitrogen formed by ammonia are less thus ammonia will be limiting reactant.

Amount of oxygen left:

                         NH₃          :             O₂

                            4            :              3

                            0.12       :          3/4×0.12= 0.09

Amount of oxygen react = 0.09 mol

Amount of oxygen left  = 0.125 - 0.09 = 0.035 mol

The sun is left on three samples of brass that are 20 °C. Tin has a larger specific heat capacity than gold, hence it takes more energy to raise the temperature.

The specific heat capacity of the heavier elements are often lower since they have fewer atoms to absorb the energy per gramme of material.

The term "heat capacity" refers to the quantity of energy required to raise or lower a material's temperature. A greater energy change is needed to change the temperature of an object with a high specific heat capacity than one with a low specific heat capacity.

To learn more about specific heat capacity visit:

brainly.com/question/29766819

#SPJ1