Velocity is
is a given
O distance, time
O speed, displacement
O speed, direction

Answer:

CH₃COOH ⇄ CH₃COO⁻ + H⁺

Explanation:

Hello,

Acetic acid is a weak acid that dissociates to give acetate and hydrogen ion in the solution. The system is at equilibrium with each other can the extent of dissociation can be given as a constant which is usually expressed as pKa.

pKa = -Log(Ka)

A buffer solution is a solution that avoids or resist a change in the pH value when an alkali or acid is added to the solution. Buffer solution usually shifts equilibrium so as to annul the effect of either the alkali or acid.

Equation of reaction.

CH₃COOH ⇄ CH₃COO⁻ + H⁺

Ka = [CH₃COO⁻][H⁺] ÷ [CH₃COOH]

The equilibrium equation for the acetic acid/acetate buffer system -  

CH₃CO₂H + H₂O ⇄ CH₃CO₂⁻ + H₃O⁺

An acid buffer is a solution that contains roughly the same concentrations of a weak acid and its conjugate base.  

The equation is:  

CH₃CO₂H + H₂O ⇄ CH₃CO₂⁻ + H₃O⁺  

where CH₃CO₂H - acetic acid  

and, CH₃CO₂⁻ acetate ion  

Thus, CH₃CO₂H + H₂O ⇄ CH₃CO₂⁻ + H₃O⁺ is the equilibrium equation for the acetic acid/acetate buffer system.  

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Based on the given reactions, the compounds are as follows:

A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.

B: The product formed when compound A reacts with 2H2O.

C: The product formed when compound B reacts with K2CO3(aq).

D: The product formed from the heat-induced reaction of compound C.

E: The product formed when compound D reacts with HBr.

Based on the given reactions, let's analyze the compounds involved:

Reaction 1: prop-1-yne + 2HBr/H2O2 = A

The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.

Reaction 2: A + 2H2O = B

Compound A reacts with 2H2O (water) to form compound B.

Reaction 3: B + K2CO3(aq) = C

Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.

Reaction 4: C + heat = D

Compound C undergoes a heat-induced reaction to form compound D.

Reaction 5: D + HBr = E

Compound D reacts with HBr (hydrobromic acid) to form compound E.

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We are given Mass of water = 42.3 g

ΔHvap(H2O)=40.7kJ/mol) indicates that 1 mol of H2O(l) requires 40.7kJ/mol of heat in order to heat up.

Similary, we can find mol of H2O since we are given mass of 42.3g :

n = mass H2O (given) /Molecular mass H2O

= 42.3g /18g/mol

= 2.35 moles

If 1 mol H2O requires 40.7kJ/mol of heat ;

then 2.35 mol H2O will require x kJ/mol to vaporise

Therefore x = (40.7kJ/mol * 2.35 mol)/1

= 95.64kJ

• This means that the heat required to vaporize 42.3 g of water at 100 ∘C = 95.63kJ.,

Answer:

Enery transformation is when a forn of energy changes into another.

Explanation:

An example of this would be a lamp. The lamp gets its energy through electricity. This electricity is later turned into light energy. Electrical energy to light evegy.

The question is missing information. Here is the complete question.

A gas at a pressure of 2.0 atm is in a closed container. Indicate the changes (if any) in its volume when the pressure undergoes the following changes at constant temperature and constant amount of gas. Match the words in the left with the column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.

1. The pressure increases to 6.0 atm. The volume ________

2. The pressure drops to 0.40 atm. The volume _________

3. The pressure remains at 2.0 atm. The volume _________

Answer: 1. Decreases

2. Increases

3. Does not change

Explanation: According to the Ideal Gas Law, Pressure, Volume and Temperature of an ideal gas is related, as the following: PV = nRT.

In this case, since temperature (T) and amount of gas (n) are constant, the Boyle's Law can be used.

The law states that the volume of a given gas, under the conditios of temperature and amount of it are constant, is inversely proportional to the applied pressure: P₁.V₁ = P₂.V₂

Initial P (P₁) = 2

Initial V (V₁) = V

Final P (P₂) = 6

P₁.V₁ = P₂.V₂

2.V = 6.V₂

V₂ = 1/3V

When the pressure increases to 6 atm, volume decreases by 1/3.

P₁ = 2

V₁ = V

P₂ = 0.4

2.V = 0.4V₂

V₂ = 5V

When pressure drops to 0.4 atm, volume increases by 5.

Since there are no change in the pressure, the volume is the same from the beginning, so does not change.

To draw the two circles, we would need to draw a smaller circle with a diameter of 2,532.5 miles (representing the moon) and a larger circle with a diameter of 75,974.4 miles (representing the Earth) that is 30 times larger than the smaller circle.

If we assume that the larger circle represents the Earth, then the diameter of the Earth would be 30 times the diameter of the smaller circle representing the moon. Let's say that the diameter of the smaller circle is x. Then the diameter of the larger circle (Earth) would be 30 times x or 30x.

To find the correct distance from Earth to the moon at this scale, we need to know the actual distance from Earth to the moon, which is approximately 238,855 miles or 384,400 kilometers. If we divide this distance by the scale factor of 30, we get:

238,855 miles / 30 = 7,961.8 miles

Therefore, the diameter of the smaller circle (moon) would be approximately 7,961.8 miles / π = 2,532.5 miles (rounded to one decimal place). And the diameter of the larger circle (Earth) would be 30 times that or 75,974.4 miles

So, to draw the two circles, we would need to draw a smaller circle with a diameter of 2,532.5 miles (representing the moon) and a larger circle with a diameter of 75,974.4 miles (representing the Earth) that is 30 times larger than the smaller circle.

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The number of tablets containing 325 mg of aspirin a 70-kg human would have to consume to achieve this dose is 4

To reach the LD50 dose, one must give (LD50 times the weight of the rat) grams of aspirin:

m=1.75 (g·kg^(-1))·7 (g)=12.25(g)

Then, we can calculate the number of aspirin tablets that contain 12.25 g of aspirin:

N=(12.250(g))/(325 (mg))=3981.2 ≈4

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The assumption that accounts for the great compressibility of gases compared to liquids and solids is assumption 1: Gases are made up of molecules which are relatively far apart. Option A)

The assumption that accounts for the great compressibility of gases compared to liquids and solids is assumption 1: Gases are made up of molecules which are relatively far apart.

In gases, the molecules are widely spaced and have significant gaps between them. This allows gases to be easily compressed under pressure. When external pressure is applied to a gas, the molecules can be brought closer together, reducing the volume occupied by the gas. The gaps between the molecules provide room for compression, allowing gases to occupy a smaller volume.

In contrast, liquids and solids have molecules or particles that are closely packed together. The intermolecular forces in liquids and solids are stronger, limiting their compressibility. The molecules or particles are already in close proximity, leaving little room for further compression.

Therefore, the assumption that gases consist of molecules that are relatively far apart accounts for their greater compressibility compared to liquids and solids. Hence Option A) is correct.

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Answer:

178.55

Explanation:

5*176+19*177+27*178+14*179+35*180 /100

= 880+3363+4806+2506+6300 /100

=17855 /100

178.55

Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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Answer: 1:1

Explanation:

Since Na trades place with Na it makes it 1:1

Explanation:

the atomic radius of ( Sn) is 225pm

The new volume of the balloon after heating it to a temperature of 51 °C is approximately 2.39 L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Given that:

Substituting the given values and solve for V₂:

\(V_1T_2 = V_2T_1\\\\V_2 = \frac{V_1T_2}{T_1} \\\\V_2 = \frac{2.2\ *\ 324.15}{298.15 }\\ \\V_2 = 2.39 \ L\)

Therefore, the final volume is 2.39 litres.

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Answer:

clouds and precipitation that minimize temperature changes throughout the day

Explanation:

Answer:

31,380 Joules

Explanation:

Given Data:

Mass = m = 100 g

Temperature 1 = = 25 °C

Temperature 2 = = 100 °C

Specific Heat Constant = c = 4.184

Change in Temp. = ΔT = 100 - 25 = 75 °C

Required:

Heat = Q = ?

Formula:

Q = mcΔT

Solution:

Q = (100)(4.184)(75)

Q = 31, 380 Joules

Hope this helped!

~AH1807

Answer:

\(\Large \boxed{\sf 31400\ J}\)

Explanation:

Use formula

\(\displaystyle \sf Heat \ (J)=mass \ (g) \times specific \ heat \ capacity \ (Jg^{-1}\°C^{-1}) \times change \ in \ temperature \ (\°C)\)

Specific heat capacity of water is 4.18 J/(g °C)

Substitute the values in formula and evaluate

\(\displaystyle \sf Heat \ (J)=100.0 \ g \times 4.18 \ Jg^{-1}\°C^{-1} \times (100\°C-25\°C)\)

\(\displaystyle Q=100.0 \times 4.18 \times (100-25 )=31350\)

Answer:

Density = Mass/Volume

= 2.45/5

Density= 0.49 g/ml

Copper is a metal that can behave like a magnet because It is a conductor and can support electric current.

What is a definition of metal?

Strong electrical and thermal conductivity, malleability, ductility, and high light reflection are all characteristics of metals, which are one type of materials.

Copper is not magnetic in and of itself. However, when a magnet comes close to copper (and some other metals), the magnetic field causes the copper's surface electrons to reorganize and start revolving. They generate resistance by rotating in a circular motion perpendicular to the magnetic field.

Copper has the highest conductivity among non-precious metals, which means it can carry more electrical current than other non-precious metals.

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The “x” shaped product of DNA replication called as chromosome. Therefore, option C is correct.

A polymer made of two poly nucleotide chains that coil around one another to form a double helix is called deoxyribonucleic acid. All known organisms and many viruses have genetic information in the polymer that is necessary for their development, operation, growth, and reproduction.

Adenine (A), cytosine (C), guanine (G), and thymine are the four different types of smaller chemical molecules together known as nucleotide bases that make up the linear molecule DNA (T). The DNA sequence refers to the arrangement of these nucleotides.

DNA is crucial for inheritance, protein coding, and supplying guidelines for life and its processes in all living organisms. DNA controls a person's or an animal's growth, reproduction, and final demise. There are 46 chromosomes in total in each of a human cell's 23 pairs of chromosomes.

Thus, option C is correct.

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A prescription medication requires 8.00 mg per kg of body weight . The 0.017 grams is required per pound of the body weight. 1.7 × 10⁻² grams is required per pound of the body weight.

The term significant figure is defined as the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value.

We are given:

Medication requirement = 5.98 mg/kg

To convert the given amount in grams per pounds, we use the conversion factor:

1 kg = 2.20462 lb

1 g = 1000 mg

Converting the value into grams per pounds, we get:

= 8 mg / kg × 1g / 1000mg × 2.20462 lb / 1kg

= 0.017 grams

Thus, 1.7 × 10⁻² grams is required per pound of the body weight.

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The value of Fx is -5.00N.  The torque or moment of force is the rotational force.

Determine Fx?

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c. To determine which has the highest concentration in molarity you must know all of them.

To determine the molarity of a solution, you must know the mass in grams of A in each solution, the molar mass of A, the volume of water added to each solution, as well as the total volume of the solution.

Mass and molar mass gives you the moles of A in each solution, while the volume of water and total volume of the solution gives you the concentration of A in each solution. Therefore, you must know all four pieces of information to determine which solution has the highest concentration of A in molarity.

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Aluminum Oxide decomposes to Aluminum metal and Oxygen gas.

- First, write down each compound:

- Second, write the number of moles of each compound, so that we have the same amount of reactants as products. Here, it is important not to change the subscript of compound elements.

For example, let's start by adding a number 2 in front of the aluminum metal to balance:

So far, the amount of aluminum has been balanced but the amount of oxygen is unbalanced, so let's add a number 3 for the oxygen gas.

Now, to have the same amount of moles of oxygen on both sides, let's put a number 2 in the aluminum oxide:

Here, the amount of aluminum moles is unbalanced, so we add a number 4 for the aluminum metal to balance:

- This is the final balanced equation of decomposition of aluminum oxide:

Answer: 50mL

Explanation: This is solved just like you'd solve a proportion in mathematics. But first, you need to make your temperature values have the same units. It is ideal to have both units in K almost 90% of the time. So to convert the values, you'll add 273 to your Celsius temperature: 27. This gives you 300. Then, you set 300K/25mL = 600K/?. We see that to get from 300 to 600, we just double our values. Therefore, we'll do the same to the 25mL. This gives us 50mL.

I hope this helps!

Answer:

Can u write in a paper and post again unable to understand

Answer:

Option A is the correct answer.

Explanation:

• According to Rutherford every atom consists of dense positively charged particle at the centre known as nucleus.  

• Nucleus consists of positively charged particle known as proton and neutral particle known as neutron.

• Alpha particles are the protons thus, it also have a positive charge.

• Since, both alpha particles and nucleus are positively charge, repulsion occurs between them which deflects the alpha particle from their actual path.

• This repulsion doesn’t depend on the number of protons present in the nucleus.

• Thus, the alpha particle fired at the nucleus would have the same strength of repulsive forces deflecting it, even if the atom’s nucleus had fewer protons than gold is a correct answer.

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Answer: \(y = \frac{1}{4}x-3\)

Explanation:

To find the inverse of an equation, follow these steps:

We are given the equation \(f(x) = 4x + 12\) , so replace f(x) with x.

Then, replace x with y.

Your new equation:

\(x = 4y + 12\)

Now, solve for y:

\(x = 4y + 12\\\\4y = x - 12\\\\y = \frac{1}{4}x-3\)

This equation is the inverse of f(x), or g(x).

We will convert the mass of tungsten into moles:

Based on the chemical equation 3 moles of hydrogen produces 1 mole tungsten. We will use this information to determine the moles of hydrogen needed to produce 5.44 moles of tungsten:

Answer: 16.32mol H2 is needed to prepare 1kg tungsten.

The balanced reaction with correct coefficients for the given chemical reaction is given as,

4Sb + 3O₂ → Sb₄O₆

H₂S + Cl₂ → S + 2HCl

Balanced chemical equations are defined as the equations that have the same number and type of each atom on both sides of the equation. The coefficients in a balanced equation must be in the simplest whole number ratio. In a balanced chemical equation mass is always conserved.

The equation Sb + O₂ → Sb₄O₆ is written after balancing as 4Sb + 3O₂ → Sb₄O₆. Therefore, its coefficients are 4 and 3.

The equation H₂S + Cl₂ → S + HCl is written after balancing as H₂S + Cl₂ → S + 2HCl. Therefore, its coefficient is 2.

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