What occurs when acid is added to a solution with a ph of 7?.

The first person to explain Brownian motion and make a convincing case for the existence of atoms was Albert Einstein.

In 1905, Einstein published a paper titled "Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten Teilchen" ("On the Movement of Small Particles Suspended in Stationary Liquids Required by the Molecular-Kinetic Theory of Heat"), in which he presented a theoretical explanation for the random motion of particles in a fluid, known as Brownian motion.

Einstein's analysis provided strong evidence for the existence of atoms and molecules, which had been hypothesized by scientists for centuries but had not yet been directly observed. Einstein's work on Brownian motion is widely considered to be one of the most important contributions to the development of modern physics.

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Answer:

1. P-Type, 2. Paramagnetic, 3. Lanthanides and Actinides, 4. Carbon, hydrogen, oxygen, and nitrogen

Explanation:

yep, the cell is the smallest unit in a living organism that is capable of carrying out all of the activities of life.

Answer:

Action and Reaction.

Explanation:

Newton has given three laws. When discussing Newton's laws of motion, the most likely used terms when talking about Newton's third law of motion are action and reaction. According to this law, for every action there is an equal and opposite reaction.

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.

Explanation:

Answer:

Basically, it's heat transfer!

Answer:

An endothermic process is any process with an increase in the enthalpy H of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system.

Explanation:

Explanation:

Amoebas are identified by their ability to form temporary cytoplasmic extensions called pseudopodia, or false feet, by means of which they move about. This type of movement, called amoeboid movement, is considered to be the most primitive form of animal locomotion.

Answer:

The Lewis structure for potassium chloride (KCl), which is an ionic compound, cannot be represented by a single Lewis structure. Ionic compounds do not have a covalent bond, instead they have an electrostatic attraction between positive and negative ions. In the case of potassium chloride, potassium (K) has a charge of +1 and chloride (Cl) has a charge of -1. The ionic compound can be represented by showing the positive and negative ions next to each other, separated by a dash or an arrow, like this:

K+ Cl-

Explanation:

Alternatively, it can be represented by a crystal lattice structure, which shows the repeating pattern of positive and negative ions in the solid compound.

The purpose of the lower air dam in the front of a vehicle is to improve aerodynamics and increase fuel efficiency. The air dam, also known as a front spoiler or splitter, is typically a protruding lip or panel located at the bottom of the front bumper.

When the vehicle is in motion, the air dam helps to redirect the airflow underneath the vehicle. It creates a smoother flow of air, reducing turbulence and minimizing drag. By reducing aerodynamic drag, the vehicle experiences less resistance, allowing it to move more efficiently through the air.

The improved aerodynamics provided by the lower air dam can result in reduced fuel consumption, as the engine does not have to work as hard to overcome air resistance. This makes the vehicle more fuel-efficient and can contribute to better overall performance.

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1. The differential equation satisfied by y(t) is:  dy/dt = 0.6 kg/min

The amount of salt in the tank after t minutes can be represented by the function y(t). We need to find the differential equation that y satisfies.
Initially, the tank contains 100 L of pure water, which means there is no salt in the tank. As time passes, a solution with a salt concentration of 0.3 kg/L is added at a rate of 7 L/min. The salt concentration in the tank will increase with the addition of this solution.
At the same time, the solution is drained from the tank at a rate of 5 L/min. This will result in a decrease in the salt concentration in the tank.
To find the differential equation satisfied by y(t), we need to consider the rate of change of salt in the tank.
Rate of change of salt in the tank = Rate of salt added - Rate of salt drained
The rate of salt added is given by the product of the concentration of the solution (0.3 kg/L) and the rate at which the solution is added (7 L/min). So, the rate of salt added = 0.3 kg/L * 7 L/min.

The rate of salt drained is given by the product of the concentration of the solution (0.3 kg/L) and the rate at which the solution is drained (5 L/min). So, the rate of salt drained = 0.3 kg/L * 5 L/min.

Therefore, the differential equation satisfied by y(t) is:
dy/dt = (0.3 kg/L * 7 L/min) - (0.3 kg/L * 5 L/min)

Simplifying the equation:
dy/dt = 2.1 kg/min - 1.5 kg/min
dy/dt = 0.6 kg/min

So, the differential equation satisfied by y(t) is:
dy/dt = 0.6 kg/min

2. The amount of salt in the tank after 40 minutes is 24 kilograms.

To find the amount of salt in the tank after 40 minutes, we can solve the differential equation.

dy/dt = 0.6 kg/min

Integrating both sides with respect to t:
∫dy = ∫0.6 dt

Integrating, we get:
y = 0.6t + C

To find the value of C, we can use the initial condition that the tank initially contains 100 L of pure water, which means there is no salt. So, at t = 0, y = 0.

Substituting these values into the equation:
0 = 0.6(0) + C
C = 0

Therefore, the equation becomes:
y = 0.6t

Now, we can find the amount of salt in the tank after 40 minutes by substituting t = 40 into the equation:
y = 0.6(40)
y = 24 kg


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Alcoholic fermentation and lactic acid fermentation are distinct processes and both involves Anaerobic process, Production of NAD+, Recycling of Electron Carriers, Microorganism Involvement.

Alcoholic fermentation and lactic acid fermentation are both anaerobic processes that occur in living organisms. They are similar in that they are metabolic pathways that help cells produce energy in the absence of oxygen. Here are some key similarities between the two processes:

Anaerobic Process: Both alcoholic fermentation and lactic acid fermentation occur in the absence of oxygen. They are alternative pathways for cells to generate energy when oxygen is not available or in limited supply.

Production of NAD+: Both fermentation processes are involved in the regeneration of NAD+ (nicotinamide adenine dinucleotide), which is necessary for the continuation of glycolysis. In both processes, NADH (reduced form) is oxidized to NAD+ (oxidized form), allowing glycolysis to proceed.

Recycling of Electron Carriers: Alcoholic fermentation and lactic acid fermentation recycle the electron carriers produced during glycolysis. NADH generated during glycolysis is oxidized back to NAD+ through the fermentation process, enabling glycolysis to continue and produce ATP.

End Products: While they have some similarities, the main difference between alcoholic fermentation and lactic acid fermentation lies in the end products produced. In alcoholic fermentation, the end products are ethanol (alcohol) and carbon dioxide. In lactic acid fermentation, the end product is lactic acid.

Microorganism Involvement: Alcoholic fermentation is commonly carried out by yeast and some bacteria, whereas lactic acid fermentation is primarily performed by certain bacteria and muscle cells.

Despite these similarities, it's important to note that alcoholic fermentation and lactic acid fermentation are distinct processes with their own specific characteristics and functions in different organisms.

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Answer:

invalid

Explanation:

Just imagine doing this experiment MULTIPLE TIMES and one of the trials you get 72 Kcal while in another u get 12kcal. It doesn't make sense. Somewhere in the experiment she went wrong. So its invalid

The concentration of [H3O+] in the solution is approximately 3.16 x 10^(-5) mol/L or M (molar)

The pH of a solution is the degree of measurement of hydronium ions, [H3O+], in the solution. The pH scale is logarithmic, hence the formula applicable here is:

pH = -log[H3O+]

To find the concentration of [H3O+], we have:

[H3O+] = 10^(-pH)

Substituting the given pH value of 4.52 into the equation, we are able to calculate the concentration of hydronium ions:

[H3O+] = 10^(-4.52)

[H3O+] ≈ 3.16 x 10^(-5) mol/L

Therefore, the concentration of [H3O+] ions in the solution is about 3.16x 10^(-5) mol/L or M (molar).

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Answer:

Air is less dense on a mountaintop than at sea level.

Air pressure is lower at low altitudes.

As you climb a mountain, air pressure increases.

More force pushes on the air at the bottom of an air column.

As you descend a mountain, air molecules are closer together.

Explanation:

Answer:

the answer is B. the energy required to go from a solid to liquid

B. The latent heat of fusion is the energy required to go from a solid to a liquid. It is the amount of heat energy that must be added to a substance at its melting point to convert it from a solid to a liquid, without changing its temperature.

Latent heat is the amount of heat energy required to change the phase of a substance without changing its temperature.

Option A describes the energy required to break molecular bonds, which is called the bond dissociation energy.

Option C describes the energy required to go from a solid to a gas, which is called the latent heat of sublimation.

Option D describes the energy required to go from a liquid to a gas, which is called the latent heat of vaporization.

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the first law of thermodynamics is a restatement of the conservation of energy

Washing machines, refrigerators, and air conditioners are a few examples of thermodynamic systems. The refrigerant in an air conditioner circulates inside a closed system, changing its pressure at various places to facilitate the transmission of heat. Energy cannot be generated or destroyed but can only be transformed from one form to another, according to the first law of thermodynamics, commonly known as the law of conservation of energy.The amount of thermal energy per unit of temperature in a system that cannot be used to carry out beneficial work is known as entropy. Since work is produced by ordered molecular motion, entropy also serves as a proxy for a system's molecular disorder or unpredictability.

the first law of thermodynamics is a restatement of the conservation of?

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Answer:

b. biosphere

do to the plant being a plant it is in the biosphere

Answer:

B, E

Explanation:

Edge

the electronegativity difference (AEN):

<0.5: covalent (non polar)

0.5- 1.7: covalent (polar)

> 1.7 : ionic

CF₄

C =  2.5

F = 4

F - C = 4 - 2.5 = 1.5 (covalent polar)

NH₃

N = 3

H = 2.1

N - H = 3 - 2.1 = 0.9 (covalent polar)

endothermic

requires energy to occure

Answer:

28

Explanation:

it states that the atom is neutral, meaning the number of electrons and protons are the same. so if there are 13 electrons, there are 13 protons. And the mass number is neutrons plus protons. So 13+15 is 28

Answer:

Bases are substances that dissolve in water to release hydroxide ions ... Chalk and oven cleaner are examples of familiar products that contain bases

The number of dots would be found in the Lewis dot structure for the compound  \(C_{2} H_{3}Cl_{3}\)  is 32.

To determine the number of dots in the Lewis dot structure for the compound \(C_{2} H_{3} Cl_{3}\) , we first need to know the structure. In the Lewis dot structure, each hydrogen atom has two dots representing two valence electrons and each chlorine atom has six dots representing six valence electrons. The carbon atoms each have four dots representing four valence electrons on their own atoms, and one additional dot on the double bond between them. Therefore, the total number of dots in the Lewis dot structure for the compound \(C_{2} H_{3} Cl_{3}\)  is:
(2 x 4) + (3 x 2) + (3 x 6) = 8 + 6 + 18 = 32

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There would be 32 dots in the Lewis dot structure for the compound \(C_{2}H_{3}Cl_{3}\).

To determine the number of dots in the Lewis dot structure for the compound \(C_{2}H_{3}Cl_{3}\)., we need to calculate the total number of valence electrons for each element in the compound.

1. Identify the number of valence electrons for each element:
  - Carbon (C) has 4 valence electrons.
  - Hydrogen (H) has 1 valence electron.
  - Chlorine (Cl) has 7 valence electrons.

2. Calculate the total number of valence electrons in the compound:
  - There are 2 carbon atoms, so 2 * 4 = 8 valence electrons for carbon.
  - There are 3 hydrogen atoms, so 3 * 1 = 3 valence electrons for hydrogen.
  - There are 3 chlorine atoms, so 3 * 7 = 21 valence electrons for chlorine.

3. Add up the total number of valence electrons:
  - 8 (from carbon) + 3 (from hydrogen) + 21 (from chlorine) = 32 valence electrons.

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1. The nucleus of the atom is composed of protons and neutrons. The nucleus is surrounded by electrons. Positive charge characterizes protons. Negative charge characterizes electrons.

2. Protons and neutrons contribute to the mass of the atom (atomic mass), and surrounded by the electrons.

3. The number of protons identifies as each element, each element has a unique number of protons in the nucleus of its atoms, Z, which determines the identification of the element.

4. If an atom containing 12 neutrons and 11 protons has atomic mass equal to 23.

5. There is just one orbital at the lowest energy level, and it can only accommodate a maximum of two electrons. The force of attraction between the protons and electrons is larger in the nucleus because there are more protons there.

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1. The empirical formula of the compound is NaOCl.

2. The compound with an empirical formula of CH has a molecular formula of \(C_ 6H_6.\) Option C

1. To determine the empirical formula of the compound, we need to find the simplest ratio of the elements present in the compound. We can assume a 100 g sample of the compound to make calculations easier.

Given that the compound is 25.42% Na, 35.40% O, and 39.18% Cl by mass, we can calculate the number of moles of each element in the 100 g sample:

Na: (25.42 g / 22.99 g/mol) = 1.106 mol

O: (35.40 g / 16.00 g/mol) = 2.213 mol

Cl: (39.18 g / 35.45 g/mol) = 1.104 mol

To find the simplest whole-number ratio, we divide the number of moles of each element by the smallest number of moles:

Na: 1.106 mol / 1.104 mol ≈ 1

O: 2.213 mol / 1.104 mol ≈ 2

Cl: 1.104 mol / 1.104 mol = 1

The empirical formula of the compound is NaOCl.

2. The empirical formula of CH implies a molar mass of approximately 13.01 g/mol (12.01 g/mol for carbon + 1.01 g/mol for hydrogen).

Given that the compound has a molar mass of 78.11 g/mol, we can find the ratio between the molar mass of the compound and the molar mass of the empirical formula:

78.11 g/mol / 13.01 g/mol ≈ 6

This means that the molecular formula of the compound is a multiple of the empirical formula. Therefore, the compound's molecular formula can be determined by multiplying the empirical formula by 6:\(C_ 6H_6.\). Option C

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Answer:

water and oxygen

Explanation:

only iron and iron alloys can rust whereas other elements corrode. for rusting to happen, 2 substances need to be present: water and oxygen

Answer:

Metal[Iron]+Water+air[Oxygen]-->Rusting

Explanation:

Rusting is an oxidation reaction.The iron reacts with oxygen and water to form hydrated iron[III]oxide.which is seen as rust due to the change in color [to brown]

The bond angles in SF₅⁺ are expected to be 90°, 120°, and 180°.

The correct option is E.

Bond angles refer to the angles between the bond linking the atoms of elements in a compound or ion.

The bond angles exist as a result of either electrical repulsion between the electrons in the bonds.

The ion SF₅⁺ contains one atom of sulfur and five atoms of fluorine linked together by covalent bonds. The shape of the ion or the molecular geometry is square pyramidal. Hence, the bond angles are 90°, 120°, and 180°.

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Answer:

They move freely between the clouds of several atoms, si the correcto Answer is D

Explanation:

Hope this helps.

Mass is the answer because when i measure i do it with the matter of mass