you see a distant flash of lightning, and then you hear a thunderclap 2 s later. the sound of the thunder moves at 343 m/s. how far away was the lightning

Answer:

\(C_{2}H_{8} O_{6}\)

Explanation:

Molecular formula can be calculated by finding the ratio of the molecular molar mass to the empirical molar mass, then multiplying the subscripts of the empirical molar mass by that ratio.

The empirical molar mass is 3(12.01) + 4(1.01) + 3(16.00) = 88.07

The molecular molar mass is 180g

180/88.07 = 2

So the molecular formula is \(C_{2}H_{8} O_{6}\)

Answer

The new substances often have different combinations of atoms different from the reactants.

Explanation

The reactants and the new substances in a chemical reaction contain the same atoms, but they are rearranged during the reaction. As a result, the atoms end up in different combinations in the new substances. This makes the products new substances that are chemically different from the reactants.

To achieve a pH of 5.35 in an acetic acid solution with a concentration of 0.10 M, the acetate concentration would need to be approximately 0.029 M.

Acetic acid (CH3COOH) is a weak acid that partially dissociates in water to produce acetate ions (CH3COO-) and hydronium ions (H3O+). The dissociation can be represented by the following equilibrium reaction:

CH3COOH + H2O ⇌ CH3COO- + H3O+

To calculate the acetate concentration required for a specific pH, we can use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

In this case, acetic acid is the HA (weak acid) and acetate is the A- (conjugate base). The pKa for acetic acid is approximately 4.75. By rearranging the equation and plugging in the given values, we can solve for the acetate concentration:

[A-]/[HA] = 10^(pH - pKa)

[A-]/0.10 M = 10^(5.35 - 4.75)

[A-]/0.10 M ≈ 3.98

Simplifying, we find:

[A-] ≈ 3.98 * 0.10 M

[A-] ≈ 0.398 M

Therefore, the acetate concentration needed to achieve a pH of 5.35 in the acetic acid solution would be approximately 0.029 M.

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The false statement regarding the Lewis structure for the nitric acid molecule, HNO3, is option B) The N-O bond order is 4/3.

The N-O bond order is actually 4/3 in one of the resonance structures of HNO3, but not in the overall molecule. The molecule requires more than one resonance structure, as stated in option A.

In water, HNO3 will dissociate to form H+ and NO3-, not H3O+, as stated in option C.

The formal charge on nitrogen can be calculated as 5-(0+6/2+2x2/2)=0, not +1 as stated in option D.

The oxidation state of nitrogen can be calculated as the sum of valence electrons of nitrogen and the electrons it has gained or lost, which is +5 in HNO3, as stated in option E.

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Answer:

elements from group four to eight

No, the volume of water in a beaker is not an extensive property.

Extensive properties are those that depend on the amount or size of the substance being measured. In other words, they are properties that change with the quantity of the substance. Examples of extensive properties include mass, volume, and total energy.

In the given scenario, the volume of water in the beaker is 50 milliliters. This volume remains the same regardless of the quantity of water present. Whether it's 50 milliliters or 500 milliliters, the volume measurement does not change. Therefore, the volume of water in the beaker is an example of an intensive property.

Intensive properties are independent of the amount or size of the substance. They are characteristics that remain constant regardless of the quantity of the substance. Examples of intensive properties include temperature, density, and color.

It's important to note that the distinction between extensive and intensive properties depends on the specific property being considered. While volume is typically an extensive property for a bulk substance, in the case of a fixed volume of water in a beaker, it becomes an intensive property.

In summary, the volume of water in a beaker is not an extensive property but rather an intensive property because it does not change with the quantity of the substance.

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Answer:

180

Explanation:

proton = 80

electron = 80

neutron = 100

Note:- the atomic number of an element is the number of protons/electrons in the atomic shell

(protons = electrons)

Mass number = number of protons/electrons + number of neutrons

MN= NP+ NN

MN = 80 + 100

MN= 180

I HOPE THIS HELPS

Answer:

true

Explanation:

because if you find the right answer that proves the theory to be correct.  

Answer:

Law of Conservation Matter

The least likely element combination would be hydrogen (H) and sodium (Na) since their ionization energies differ significantly.

To determine the least likely element combination, we need to consider the ionization energies and their relative values. The element combination that is least likely would involve elements with similar or close ionization energies.

Comparing the ionization energies:

1,312 kJ/mol (H) < 1,402 kJ/mol (N) < 1,314 kJ/mol (O) < 496 kJ/mol (Na)

Based on these values, the least likely element combination would be hydrogen (H) and sodium (Na) since their ionization energies differ significantly.

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the developing solvents were 2% sodium chloride aqueous solution and 2% isopropyl alcohol aqueous solution

Isopropyl alcohol can be "salted out," which uses salt to remove water from the substance and thereby boosts its potency. When salt is added to water, it dissolves, but is insoluble in isopropyl alcohol, which causes the water to become heavier and sink to the bottom while the alcohol floats to the top.

Salt and alcohol do not interact, despite the fact that water and alcohol do. The solution becomes salty when salt is added, but the salt dissolves in the water but not the alcohol.

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Answer:

Young's double slit experiment is the classic proof of the wave nature of light. In the experiment light from two sources interfere. Particles are thought to be unable to interfere, but wave interference is well established by observation.

The photoelectric effect is the experiment that challenged the prevailing view that light was a wave (established by Young as above). There are several bits of detail to the experiment that confirm that light exhibits particle behaviour. The main thing to appreciate is that the threshold frequency and instantaneous emission of electrons support a discrete nature to light.

The mineral composition of soils does not have a direct influence on the type of subsidence or volume changes that will occur. Therefore, the given statement is false.

The subsidence or volume changes in soils are primarily influenced by factors such as moisture content, compaction, consolidation, organic content, and geological conditions.

While mineral composition can indirectly affect some of these factors, it is not the sole determinant of subsidence or volume changes. Other factors, such as soil structure, groundwater levels, and external loads, also play significant roles in these processes.

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Answer:

Gases

Explanation:

Particles can move quickly in gases because there is less attraction and there is more space for the particles to move.

The resultant pH value will be 1.04.

The pH of 0.101 M HCL Solution can be easily evaluated using a pH calculator.

The pH of a solution is a measure of the hydrogen ion concentration in a solution and is calculated using the negative logarithm of the concentration of hydrogen ions.

A pH of 1.04 indicates that the concentration of hydrogen ions in the 0.101 M HCL Solution is 0.001 M. pH is an important measurement in many applications, such as chemistry, medicine, and food safety.

The pH of a solution can be easily calculated using a pH calculator. Simply enter the concentration of the solution and the calculator will provide the pH value of the solution.

The calculator uses the equation: pH = -log[H+], where [H+] is the concentration of hydrogen ions in the solution. In this case, the concentration of hydrogen ions in the 0.101 M HCL Solution is 0.001 M, and the resultant pH value is 1.04.

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Answer:

A. 7

(assuming the water is neutral)

Answer:

(i) In a bond amortization schedule, the book value represents the remaining amount of the bond principal that hasn't been paid off at a given point in time. When a bond is first issued, its book value equals its face value. As payments are made over the life of the bond, a portion of these payments reduces the book value. By the end of the bond's life, its book value will be zero, as the entire principal will have been paid off.

(ii) The formula for the book value B at time k, where k is the number of periods elapsed, is B = C + Cg - jan-kj.

Here:

- C is the redemption amount,

- g is the modified coupon rate per period,

- j is the yield rate per period, and

- a_n-kj is the present value of an annuity immediate with n - k periods at the yield rate j.

This formula states that the book value at any time k is the redemption amount plus the present value of the future coupon payments (Cg), minus the present value of the annuity that represents the repayments of the bond (jan-kj).

The amortized amount at time k is the change in the book value from time k-1 to time k, plus the coupon payment at time k. It represents the portion of the bond's principal (and interest) that has been repaid up to time k.

(iii) If K is defined as the present value of the redemption value C, according to the Makeham formula, (C-K) would represent the difference between the redemption value of the bond and its present value. This difference is the amount of interest that will accumulate over the life of the bond. In other words, (C-K) can be interpreted as the total interest that the bondholder will earn from holding the bond until redemption, assuming that all coupon payments are reinvested at the yield rate j.

Explanation:

Answer:

Explanation:

when a car begins to slow down the speed that it was going will decrease. Which means that it is an example of deceleration.

Answer:

The answers would be : ( a car approaching a red light )

15 N .

F= m.a ----> 15 = 5.3

The scientific observation definition is any sensory revel about a natural phenomenon. medical observations can occur in a lab placing or inside the herbal world. as instance, watching an apple fall from a tree may be a remark. Noticing that fish handiest come to a specific part of the river in the early morning is likewise an observation.

Smelling rubbish decomposing is another example of observation. Observations can use any of the five senses and include anything that can boost a query or begin research. Extraneous variables may become confounding variables and when they are not controlled early enough in a study, they could affect the results of the experimental research.

An end is a statement based totally on experimental measurements and observations. It includes a precis of the consequences, whether or not or now not the speculation turned into support, the importance of the have a look at, and destiny research. The value of a managed test is that it yields an excessive diploma of self-assurance within the outcome.  which variable induced or did no longer purpose an exchange.

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Answer: 13.1

Explanation: just round the .06 to 1 creating three sig figs.

The binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond.  Option b

Aminoacyl-tRNA is a complex molecule that plays a crucial role in protein synthesis. It consists of a tRNA molecule covalently linked to an amino acid. The amino acid is attached to the 3' end of the tRNA molecule through an ester bond.

An ester bond is formed between the carboxyl group (-COOH) of the amino acid and the hydroxyl group (-OH) of the ribose sugar at the 3' end of the tRNA molecule. This ester bond is also referred to as an ester linkage. The formation of the ester bond is catalyzed by the enzyme aminoacyl-tRNA synthetase.

The ester bond in aminoacyl-tRNA is essential for protein synthesis. During translation, the aminoacyl-tRNA molecule carries the specific amino acid to the ribosome, where it is incorporated into the growing polypeptide chain. The ester bond is later hydrolyzed, releasing the amino acid for further use in protein synthesis.

In summary, the binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond between the carboxyl group of the amino acid and the hydroxyl group of the ribose sugar in the tRNA molecule.

Option b

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Answer:

21

Explanation:

Let us count the number of individual atoms for Na2S2O3 (the compound name):

Na: 2

S: 2

O: 3

This brings us to a total of 7 atoms for one molecule of sodium thiosulfate. For three of these compounds, we get 3*7=21

Answer:

3.

a.climate

4.

c.average measurements of temperature and rainfall over many years

The given statement "The goodyear blimp is filled with the nearly 203,000 cubic feet of the gas helium" is true because the helium will be maintained under the low pressure.

The helium gas inside the Goodyear blimp is considered to be the an ideal gas. The ideal gas law or equation relates with  the pressure, the volume, the number of moles, and the temperature to each other for an ideal gas. The ideal gas equation is as follows :

P V = n R T

Where

The P is the pressure of the gas

The V is the volume of the gas

The T is the temperature of the gas

n is the number of the moles

R is the gas constant

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Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

brainlest?

Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.

In order to properly mix these two components together, they must be poured into a special holder called a dappen dish.

When it comes to creating artificial nails using acrylics, the process involves mixing a monomer liquid and polymer powder together to form a pliable mixture that can be shaped and molded. However, in order to properly mix these two components together, they must be poured into a special holder called a dappen dish. This small glass or plastic container is designed to hold the monomer and polymer powder until they are ready to be mixed together with a brush.

The dappen dish allows for precise measurements and easy access to the mixture during the application process. Overall, the dappen dish is a crucial tool in the acrylic nail application process, as it provides a convenient and efficient way to mix the monomer liquid and polymer powder together.

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The average reservoir pressure just before the initiation of a flame event, as well as the greatest normal operating pressure at a specific point in the system.

What is a good instance of pressure?

Holding a knife against a piece of fruit will demonstrate pressure in an easy way. It won't cut the surface of the fruit if you press the flat part of the knife against it. A sizable area is affected by the force (low pressure)

What are the many sorts of pressure?

The force applied physically to an object is referred to as pressure. Per unit area, the force is applied perpendicularly to the surfaces of the objects. The fundamental pressure formula is F/A. (Force per unit area). measure of pressure

Briefing:

W = 352 joule & n = 0.325 & T by kelvin = 22+273 = 295 K & Pf= 1.76

352 = (0.325 x 8.314 x 295)㏑(Pi/Pf)

∴㏑(Pi/Pf) = -352 / (0.325 x 8.314 x 295)

㏑(Pi/Pf) = - 0.44

Pi/Pf = 0.644

∴ Pi =1.76 x 0.644 = 1.13 atm

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Potassium will be forced out of the cell rather than into it if the combined strength of the chemical and electrical driving forces is greater.

The electrical potential gradient across the cell membrane and the concentration gradient of the permeant ion across the membrane together make up the net electrochemical driving force. The net driving force can be altered by changing either one. The potential difference across the cell membrane is known as the membrane potential of a cell, which is calculated as the inside potential minus the outside. It happens as a result of the cell membrane's ability to separate charges.

A cell's electromotive force (EMF) The highest potential difference between any two electrodes in a cell is known as the EMF.

Electrochemical forces: If the combined strength of the chemical and electrical driving forces is greater, potassium will be pushed out of the cell rather than into it.

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The correct answer for the changes in the Earth's atmosphere over 4.5 billion years is: The amount of CO₂ has increased and the amount of O₂ has decreased.

The correct answer for the surface temperature on a world with a very thin atmosphere would be: Different at the equator and pole and different over the year.

Throughout Earth's history, there has been a general trend of increasing carbon dioxide (CO₂) levels and decreasing oxygen (O₂) levels in the atmosphere. This is primarily due to various natural processes such as volcanic activity and the evolution of photosynthetic organisms. The early atmosphere had a high concentration of CO₂, but over time, through processes like photosynthesis and the formation of fossil fuels, CO₂ levels decreased while O₂ levels increased. However, in recent centuries, human activities, particularly the burning of fossil fuels, have significantly increased CO₂ levels, leading to concerns about climate change.

In a world with a very thin atmosphere, the surface temperature would vary significantly between the equator and the poles. The equator would receive more direct sunlight and experience higher temperatures, while the poles would receive less sunlight and be colder. Additionally, the temperature would also vary over the year due to the tilt of the planet's axis and its orbit around the sun, causing seasonal changes. The lack of a substantial atmosphere would result in limited heat retention and redistribution, leading to pronounced temperature variations based on geographical location and time of the year.

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