A sample of gas has an initial volume of 15ml at a pressure of 800 mmHg and a temperature of 25°C. If changes are made to the
system so that the new volume is 30 ml at a temperature of 30°C,
what is the new pressure?

Answer:

Light from the window reflecting off the face of his watch <33

Answer:

5.45 mL

Explanation:

Archimedes' principle tells us that the volume of water an object displaces when it is submerged is equal to the object's volume.

This means that in order to calculate the object's volume, we can calculate the amount of water it displaced:

Thus the volume of the object is 5.45 mL.

Answer:

1. V2.

2. 299K.

3. 451K

4. 0.25 x 451 = V2 x 299

Explanation:

1. The data obtained from the question include:

Initial volume (V1) = 0.25mL

Initial temperature (T1) = 26°C

Final temperature (T2) = 178°C

Final volume (V2) =.?

2. Conversion from celsius to Kelvin temperature.

T(K) = T (°C) + 273

Initial temperature (T1) = 26°C

Initial temperature (T1) = 26°C + 273 = 299K

3. Conversion from celsius to Kelvin temperature.

T(K) = T (°C) + 273

Final temperature (T2) = 178°C

Final temperature (T1) = 178°C + 273 = 451K

4. Initial volume (V1) = 0.25mL

Initial temperature (T1) = 299K

Final temperature (T2) = 451K

Final volume (V2) =.?

V1 x T2 = V2 x T1

0.25 x 451 = V2 x 299

Answer:

its  Hypothalamus

Explanation:

Answer:

Six oxygen atoms are involved in this reaction.

The specific heat capacity of the nickel metal is 0.45.

Let us recall that the specific heat capacity is used to describe the amount of the quantity of heat that is able to cause the temperature of a unit mass of a substance to increase by 1 kelvin.

Now we know that the heat that is lost by the metal is equal to the heat that is gained by the water as such we have;

mcwdT = -mcmdT

cm = mcwdT/mdT

cm = Heat capacity of the metal

cw = Heat capacity of the water

m = mass of the metal and the water

dT = temperature change

To obtain the heat capacity;

cm = 150 * 4.2 * (25 - 23.5)/-28.2 * (25.0 - 99.8)

cm = 945/2109.4

cm = 0.45

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A raised weight.

Water that is behind a dam.

Have a nice day!

Answer:

When something has a high position, its gravitational potential energy is high. For example, a book on a high bookshelf has higher potential energy than a book on the bottom shelf because it has farther to fall. ... A book on a table before it falls. A child at the top of a slide.

Explanation:

U=m g h

Answer:

4) how charged the object creating the field is and the distance between the two charged objects

Temperature influences the spontaneity of a reaction by affecting both the enthalpy (ΔH) and entropy (ΔS) terms in the Gibbs free energy equation. The balance between these two factors determines the direction and spontaneity of the reaction.

Temperature plays a significant role in determining whether a reaction is spontaneous or not. To understand this, let's first review the concept of Gibbs free energy (ΔG). Gibbs free energy is a thermodynamic property that measures the maximum amount of useful work that can be extracted from a system at constant temperature and pressure.

ΔG is related to spontaneity through the equation: ΔG = ΔH - TΔS

In this equation, ΔH represents the change in enthalpy (heat content) of the system, ΔS represents the change in entropy (disorder) of the system, and T is the temperature in Kelvin.

Temperature and Enthalpy (ΔH):

The enthalpy change of a reaction, ΔH, reflects the difference in energy between the reactants and the products. Reactions can be either exothermic (ΔH < 0) or endothermic (ΔH > 0). When the temperature is low, an exothermic reaction has a more negative ΔH, making the ΔG term (ΔH - TΔS) more negative. Consequently, the reaction is more likely to be spontaneous. Conversely, at high temperatures, the ΔH term becomes less negative, reducing the overall spontaneity of the reaction.

Temperature and Entropy (ΔS):

Entropy, ΔS, measures the degree of disorder in a system. Generally, reactions that lead to an increase in the total number of product molecules have a positive ΔS. Increased disorder (positive ΔS) contributes to a negative ΔG term, making the reaction more likely to be spontaneous. Higher temperatures favor a greater degree of disorder, enhancing the spontaneous nature of reactions with positive ΔS.

Temperature and ΔG:

The relationship between temperature and spontaneity is directly related to the ΔG term in the equation ΔG = ΔH - TΔS. When ΔG is negative, the reaction is spontaneous. Conversely, when ΔG is positive, the reaction is non-spontaneous. If the reaction is at equilibrium, ΔG is zero. At low temperatures, the ΔH term predominantly influences the spontaneity of the reaction, while at high temperatures, the ΔS term becomes more significant.

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Answer:

Diboron tetrachloride --->  B2Cl4

Magnesium loses electrons and loss of electrons is oxidation. Copper (II) ions gain electrons and gain of electrons is reduction. Redox is when oxidation and reduction occur simultaneously in the same reaction.

Answer:

Gains of electrons

Answer:

pH=4.05

Explanation:

C7H6O2  -> C7H6O-  + H+

ka= [C7H6O-] [H+]/[C7H6O2]

During equilibrium

[C7H6O-]= [H+]= x^2

[C7H6O2]=0.12-x

Replace

ka= x^2/0.12-x

6.5 x10^-5= x^2/0.12-x

7.8x10^-6 - 6.5 x10^-5x=x^2

x^2+ 6.5 x10^-5x - 7.8x10^-6

Solution of quadratic equation

x=8.8 x10^-5

pH= -log [H+]= -log 8.8 x10^-5=4.05

The pH value of the benzoic acid solution is equal to 4.05.

pH can be defined the negative logarithm of hydrogen ion concentration. pH can be seen as an abbreviation of the power of hydrogen or the concentration of hydrogen ions in a solution.

Mathematically, pH equals the negative logarithmic value of the concentration of hydrogen ion (H⁺).

pH = -log [H⁺]

The pH scale have range from 0 to 14 when 7.0 is neutral. A low pH is acidic and a high pH is basic. Pure water has a pH of 7.0.

The partial dissociation of benzoic acid in an aqueous solution can be shown as:

\(C_6H_5COOH +H_2O\)  ⇄  \(C_6H_5COO^- +H_3O^+\)

ka= [C₆H₅O⁻] [H₃O⁺]/[C₆H₅COOH]

At equlibrium:[C₆H₅O⁻] = [H₃O⁺] = x²

[C₆H₅COOH] = 0.12-x

The equilibrium constant: ka= x²/0.12-x

6.5 × 10⁻⁵ = x²/0.12-x

7.8 × 10⁻⁶- 6.5  × 10⁻⁵ x = x²

x²+  6.5  × 10⁻⁵ x- 7.8 × 10⁻⁶ = 0

The solution of the given quadratic equation will be:

x = 8.8 × 10⁻⁵

pH= -log [H⁺]= -log [8.8 × 10⁻⁵] =  4.05

Therefore, the pH of the given benzoic acid solution is 4.05.

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Answer:

True

Explanation:

Answer:

any push or pull that causes an object to move, stop, or change speed or direction

Description:

zayn your my enemy

Answer:

To calculate the kinetic energy of an object, we use the formula KE = 1/2 * m * v^2, where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object. In this case, the kinetic energy of the cart would be calculated as follows: KE = 1/2 * 800 kg * 10 m/s^2 = 4000 J.

Explanation:

However, it's important to note that the kinetic energy of an object depends not only on its mass and velocity, but also on its height. In the case of a cart moving down a slope, the potential energy it has due to its height will be converted into kinetic energy as it moves. Therefore, in order to accurately calculate the kinetic energy of the cart, we would need to know its height relative to some reference point (such as the ground), as well as its velocity.

Answer:

What are the options

Explanation:

Tell me

Vapor unlikely to behave as an ideal gas near the temperature at which the vapor would liquify the intermolecular forces between the gas molecules become more significant as the temperature decreases.

An ideal gas can be envisioned as a hypothetical gas consisting of a collection of randomly-dispersed, non-interacting particles with negligible volume.

The notion of an ideal gas proves valuable as it adheres to the principles of the ideal gas law, which is a simplified equation of state.

Furthermore, the behavior of an ideal gas lends itself to analysis through the lens of statistical mechanics.

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Answer:

9% solution by mass

Explanation:

If there is 500 gm of solution and 45 g of it is glucose then:

45/500 * 100% = 9 % solution

Answer:

nothing

Explanation:

hope this helps ;)

The substances required for the production of illicit drugs vary depending on the type of drug being produced. For example, methamphetamine production typically involves the use of chemicals such as pseudoephedrine, anhydrous ammonia, and lithium, while cocaine production requires coca leaves and other chemicals like hydrochloric acid.

Other illicit drugs like heroin, ecstasy, and LSD also require specific substances for production. It is important to note that the production of illicit drugs is illegal and poses significant health and safety risks.

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Answer:

Explanation: If the water vapor content stays the same and the temperature drops, the relative humidity increases. If the water vapor content stays the same and the temperature rises, the relative humidity decreases. This is because colder air doesn't require as much moisture to become saturated as warmer air.

Answer:

Using hydroelectricity or Hydropower can cause enviromental threats, such as damaging wild life, habitat, water quality, and obstruct fish behaviors. Also it diminish recreational benefits of rivers.

Explanation:

Answer:

analyitical

Explanation:

Answer: Analytical chemistry

Explanation:I just finished this question

Approximately 402.34 mL of concentrated HCl solution should be used to make 4.60 L of an HCl solution with a pH of 1.90.

To determine the volume of concentrated HCl solution needed, we can follow these steps:

Calculate the amount of HCl needed: The desired pH of the solution is 1.90, which corresponds to a concentration of H+ ions of 10^(-pH), or approximately 0.012589. This concentration represents the molar concentration of HCl needed in the final solution.

Calculate the moles of HCl needed: Using the molar mass of HCl, which is approximately 36.461 g/mol, we can convert the desired concentration from step 1 into moles of HCl.

Calculate the mass of the concentrated HCl solution needed: Since the concentrated HCl solution is 36.0% HCl by mass and has a density of 1.179 g/mL, we can use its density to calculate the mass of the HCl needed, and then divide by its mass percentage to get the total mass of the concentrated HCl solution required.

Calculate the volume of concentrated HCl solution needed: Finally, we can divide the mass of concentrated HCl solution calculated in step 3 by its density to obtain the volume of concentrated HCl solution needed in mL. This comes out to be approximately 402.34 mL. So, approximately 402.34 mL of concentrated HCl solution should be used to make 4.60 L of an HCl solution with a pH of 1.90.

This calculation assumes ideal behavior of HCl in solution and neglects any other factors that may affect the actual pH of the resulting solution.

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Answer:

Cm2 Is not a unit of volume.

Explanation:

Hope this helps!

Please mark as brainliest if correct!

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question we have

\(volume = \frac{1000}{13.6} \\ = 73.52941...\)

We have the final answer as

Hope this helps you

Answer:

500/100=5m

W=F*D

W=20*5=100Nm

Explanation:

The work done in Nm on the object is 100 Nm

Since A force of 20N acts on an object. It causes a displacement of 500 cm in the direction of the force.

Since the displacement is in cm

So, in meters, it should be like

= 500 / 100

= 5 m

Now we know that

Work done = force * displacement

= 20N * 5

= 100 Nm

hence, The work done in Nm on the object is 100 Nm

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Answer:together doesn't make water

Explanation:

together doesn't make water

In the given reaction, aluminum is the species that underwent oxidation in this reaction.

An oxidation reaction is a chemical reaction in which one or more electrons are lost from a molecule, atom or ion.

This can result in an increase in the oxidation state or oxidation number of the species undergoing oxidation.

Oxidation reactions are always accompanied by reduction reactions, in which another species gains one or more electrons, leading to a decrease in its oxidation state.

In the given reaction:

\(2Al + 3Cu_2+ ---- > 2Al_3+ + 3Cu\)

Aluminum (Al) is being oxidized from its elemental form to its +3 oxidation state, while copper (Cu) is being reduced from its +2 oxidation state to its elemental form.

Therefore, aluminum is the species that was oxidized in this reaction.

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