Which of the galaxies below is called a barred-spiral galaxy

Answer:

true

Explanation:

usually 1 is never written as the coefficient in chemical compounds and just ignored.

I believe the answer is True

Answer:

a. Electric Energy

b. Light Energy

c. Thermal Energy

Explanation:

a. When a lamp is turned on by means of a switch, electric energy is usually used, since that is the form of energy that is generated when there is a potential difference between two points, which allows to establish an electric current, that electric current travels through the wires up to the bulb of the lamp

b. In this case a case of light energy is presented since that is the energy transported by the light and that is manifested on the matter in different ways, one of them is to remove the electrons from the metals. This is what usually happens in some types of light bulbs, that when the displacement of the electrons is promoted, a beam of light is generated.

c. The last case is a case of thermal energy, since this energy is that expressed as the total kinetic energy resulting from the random movements of atoms and molecules. This was what could happen in case b, when the beam of light was generated. This energy is released in the form of heat, and may present high temperatures.

The study of chemicals and bonds is called chemistry. There are two types of elements and these are metals and nonmetals.

The correct answer is mentioned below.

According to the question, the energy used in the question is as follows:-

Hence, the correct answer to the question is mentioned above.

For more information about the energy, refer to the link:-

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Answer:

Ionic Bonding: The formation of an Ionic bond is the result of the transfer of one or more electrons from a metal onto a non-metal.

Covalent Bonding: Bonding between non-metals consists of two electrons shared between two atoms.

Explanation:

Answer:

=1.36kg

Explanation:

First heat is absorbed to melt the ice- latent heat of fusion of ice then heat is absorbed to raise the temperature to 373K

The specific heat capacity of water is 4.187kJ/kg/K while  the latent heat of fusion of ice is 2230kJ/kg/K.

Letting the mass of the ice to be =x

x×2230kJ/kg/K + x×4.187kJ/kg/K×100K= 3600kJ

2230x+418.7x=3600

2647.8x=3600

x=1.36 kg

The fossil fuels, CO2, greenhouse effect, and climate change are all things that are connected with each other and contribute for each successive one to occur. The fossil fuels are heavily used by the humans. Through their burning, the fossil fuels release lot of CO2 into the atmosphere. The CO2 is the most common greenhouse gas, thus it is a gas that manages to trap the heat into the atmosphere. So as the CO2 from the burning of the fossil fuels increases in the atmosphere, the greenhouse effect also increases. The greenhouse effect is the one that manages to keep the Earth warm, which is good, but it can also pass the limit and make the whole planet much warmer, resulting in rise of the sea levels because of the melting of the ice caps and glaciers. That will cause significant climate changes all over the globe because the sea currents will change, the atmosphere will keep more heat, and the water surface will increase.

The answer is:

The number of moles (n) is 65.55 mol.

[tex]n=65.55mol[/tex]

To solve the problem, we need to use the ideal gas law.

The Ideal Gas Equation is given by the following expression:

[tex]PV=nRT[/tex]

Where,

P, is the pressure in atm

V, is the volume in liters (L)

n, is the number of moles

R, is the Ideal Gas Constant

T, is the temperature in Kelvin (K)

We are given the information:

[tex]P=12500Pa\\V=1750dm^{3}\\T=127\°C[/tex]

We need to convert the given units in order to use the Ideal Gas Equation, so, converting we have:

Pressure:

We know that:

[tex]1atm=101325Pa[/tex]

So, converting we have

[tex]125000Pa*\frac{1atm}{101325Pa}=1.23atm[/tex]

Volume:

We know that:

[tex]1L=1dm^{3}[/tex]

So, we have:

[tex]1750dm^{3}=1750L[/tex]

Temperature:

We know that to convert from celsius degrees to Kelvin, we need to perform the following operation:

[tex]T(K)=T(\°C)+273.15[/tex]

So, converting we have:

[tex]T(K)=127+273.15=400.15[/tex]

Also,  we have that

[tex]R=0.08205746\frac{atm.L}{mol.K}[/tex]

Now, substituting the given information into the equation to isolate "n", we have:

[tex]PV=nRT\\\\1.23atm*1750L=n*0.08205746\frac{atm.L}{mol.K}*400.15K\\\\2152.5atm.L=n*32.84\frac{atm.L}{mol}\\\\n=\frac{2152.5atm.L}{32.84atm.L}mol\\\\n=65.55mol[/tex]

Hence, we have that the number of moles (n) is 65.55 mol.

Have a nice day!

Answer:

65.81

Explanation:

Educere/ Founder's Education

Answer: It's the first one,

the very bottom of the ocean and they are relevant by most of the animals feed off of the animals that come out of he vents

Answer:

Option: B.

Explanation:

Weathering

Answer: weathering is your answer

Explanation:

The answer is B :))))

If more hydrogen gas is added to the reaction mixture, there will be a shift toward the reactants. Therefore, the correct option is option B.

Le Chatelier's principle, sometimes referred as Chatelier's concept, is indeed a chemical concept that predicts how changes in conditions would impact chemical equilibria. The idea is named for Karl Ferdinand Braun and, on occasion, French scientist Pierre Louis Le Chatelier, who independently discovered it.

When a concentration, temperature, volume, or pressure increase is applied to a simple system in thermodynamic equilibrium, it moves to a new equilibrium. The earlier alteration is somewhat cancelled out by this new equilibrium.  If more hydrogen gas is added to the reaction mixture, there will be a shift toward the reactants.

Therefore, the correct option is option B.

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Hello There!

Conduction is the transfer of heat from one particle of matter to another.

“I Have 3 Examples Of Convection Provided Below”

“A Pot Sitting On A Hot Burner”

“Picking Up A Hot Cup Of Coffee”

“Feet On Hot Sand”

Answer: Each ion is surrounded by water molecules

Explanation: The ions are surround by the water molecules which act as a barrier around the ions and prevent the recombination of ions. The ions are said to be hydrated.

Answer:

Each ion is surrounded by water molecules.

Explanation:

During dissolution of ionic solute in water the following process occur

a) Breaking of molecule into separate ions (need lattice energy)

b) hydration of each ion by water molecules (hydration energy is released)

c) due to hydration the ions of solutes further become far from each other.

There is no breaking of water molecule or the ions do not combine to form molecule.

Answer:

To determine a molecular formula from the empirical formula you need to know:

-the molecular mass

-calculate the empirical formula mass

-divide the molecular formular by the empirical formula mass

-multiply by this whole number the empirical formula

Explanation:

See the image below

Object A will have a positive charge since it is losing electrons. And object B would have a negative charge since its gaining electrons. For example, magnesium atom is object A and chloride atom is object B. Magnesium atom gives an electron away to the chloride atom. Therefore the chloride atom will have a negative charge of one and magnesium has a positive charge of 1.

The answer is A. Object A will have a positive charge.

Answer:

Matter is something that is made of atoms like a liquid, solid, or gas and energy is when water becomes a gas and the energy starts to get faster to where there is steam because the gas is being trapped inside the pot or any other object.

Explanation:

Answer:

Water

Explanation:

Strong electrolytes will completely ionize in water, and water cannot do that to itself.

which is not a strong electrolyte?

water

Answer:

SPECIFIC HEAT CAPACITY

Explanation:

Q = MC DELTA T

q = heat

c = specific heat

T = temperature ( final - initial )

The formula used to calculate the heat required to warm or cool one phase of matter is given by the specific heat capacity equation:

[tex]\[ Q = mc\Delta T \][/tex]

where:

- [tex]Q\\[/tex] is the amount of heat energy transferred,

- [tex]m[/tex] is the mass of the substance,

- [tex]c[/tex] is the specific heat capacity of the substance (the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius),

- [tex]\( \Delta T \)[/tex] is the change in temperature, calculated as the final temperature minus the initial temperature[tex](\( T_{\text{final}} - T_{\text{initial}} \)).[/tex]

 This formula assumes that no phase changes occur during the heating or cooling process. If a phase change does occur (such as melting or boiling), a different formula involving the latent heat of fusion or vaporization is used. The latent heat formula is:

[tex]\[ Q = mL \][/tex]

 where:

- [tex]\( L \)[/tex] is the latent heat of fusion (for melting or freezing) or latent heat of vaporization (for boiling or condensing).

 In summary, to calculate the heat required to warm or cool a substance without a phase change, use the specific heat capacity equation. If a phase change is involved, use the latent heat equation.

Answer:

The missing pieces of the nuclear equation are:

Explanation:

1) Given nuclear reaction:

[tex]^9_4Be+^1_1H->^A_ZX+^4_2He[/tex]

2) A: mass number:

Balance the mass numbers of both sides of the nuclear reaction.

The mass number is the superscript to the left of the chemical symbol:

3) Z: atomic number

Balance the atomic numbers of both sides of the nuclear reaction

The atomic number is the subscript to the left of the chemical symbol:

4) Identity of the element.

The atomic number, which is the number of protons, identifies the unknown element: X.

You can find this information in a periodic table.

The element with atomic number 3 is lithium, and its chemical symbol is Li, hence X = Li.

Answer:

Concentration cells have the same substance for both anode and cathode.

Explanation:

Plato

The correct statement about concentration cell is concentration cells have the same substance for both anode and cathode. The correct option is D.

Anode is the negative terminal of the cell in which the electrons are released or reduced.

The cathode is the positive terminal where the electrons are accepted, here oxidation occurs.

Thus, the correct option is D. Concentration cells have the same substance for both anode and cathode.

Learn more about anode and cathode

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Answer:No charge

Explanation:

Cu3PO4 is an ionic compound which my definition has no charge (or a charge of 0). But if you are referring to the ions themselves that make up the compound, PO4 is a polyatomic ion so you can look up its charge in a polyatomic ion chart (it is 3-). Thus since there are 3 Cu's per PO4^3-, each Cu must have a charge of 1+.

The charge of Cu3PO4 is neutral, and each Cu ion in the molecule carries a +1 charge to balance the -3 charge from the phosphate ion.

The compound Cu3PO4 is made up of Cu (Copper) and PO4 (Phosphate) ions. When these ions bind to form an ionic compound such as Cu3PO4, the total charge of the compound should be neutral.

The charge of Cu3(PO4)2 is +2.

In this case, phosphate has a charge of -3, and for the molecule to be neutral, the total charge from the 3 Copper ions must be +3, making the charge of each Cu (Copper) ion as +1.

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the second law of thermodynamics

Answer:

Both have a pH greater than 7, but NH₃ has a lower pH than KOH.

Explanation:

Both have a pH greater than 7, but NH₃ has a lower pH than KOH.

Answer: B) Both have a pH greater than 7, but NH3 has a lower pH than KOH.

A temperature change in a reaction indicates a chemical change

A temperature change in a reaction indicates occurrence of chemical change.

In chemistry, two types of reaction are always witnessed. One is physical reaction whereas the other is chemical reaction. In a chemical reaction, there is an adjustment in the organization of the substances whereas in a physical change there is a distinction in the appearance, smell, or straightforward showcase of an example of issue without an adjustment in structure.

At the point when bonds are broken and new ones are shaped, a compound change happens. The following happenings indicate the chemical change:

Answer:

[H⁺] = 3.548 x 10⁻⁴ M.

Explanation:

∵ pH = -log[H⁺]

∴ 3.45 = -log[H⁺]

log[H⁺] = -3.45

∴ [H⁺] = 3.548 x 10⁻⁴ M.

To find the hydrogen ion concentration from a pH of 3.45, calculate 10 to the power of negative pH, resulting in a hydronium ion concentration of approximately 3.55 × 10-4 M.

To calculate the hydrogen ion concentration for an aqueous solution with a pH of 3.45, we can use the definition of pH which is pH = -log[H3O+]. We need to reverse the process to find the concentration of hydronium ions (H3O+). This is done by taking the antilog (inverse log) of the negative pH value.

First, we reverse the sign of the pH to get -3.45. Using a calculator, we enter -3.45 and then press the 10x or exp button to find the concentration of H3O+. The result is that [H3O+] = 10-3.45 M, which calculates to approximately 3.55 × 10-4 M.

Answer:

the reaction with the hydrochloric acid and the sodium hydroxide gives you HCl + NaOH which gives you H2O + NaCl.

Explanation:

Balance the chemical equation. Balancing the neutralization reaction involves the process of making sure that there is an equal number of moles of each of the elements on both sides of the equation.

Answer:Any change that occurs without altering the chemical composition of a substance is a physical change. Physical changes can include changing the color, shape, state of matter, or volume of a substance. It is crucial to remember that physical changes never alter the chemical makeup.

Explanation:

i hope that helps u try to figure it out a little bit sorry i couldn't find your answer i didn't have much to go off of

Final answer:

A physical change in the shape of an object is caused by the application of force, resulting in a deformation without altering the object's chemical composition. Examples include the melting of ice, the separating of coins, and the tearing of paper.

Explanation:

The action that produces a physical change in the shape of an object is the application of a force resulting in deformation. When a force is applied, it may cause the object to undergo squashing, squeezing, ripping, twisting, shearing, or pulling, changing the object's shape. For instance, when melting an ice cube, it undergoes a physical change as it shifts from a solid to a liquid state. Crucially, although its shape and physical properties alter, the chemical composition remains unaltered. The same applies when separating a mixture of pennies and nickels into two groups, or tearing a piece of paper; you change the configuration or the appearance but not the substance's identity. These are all examples of physical changes.

The answer is:

The new temperature of the gas is equal to 388.22 K

Since we have a rigid container, we can safely assume that the volume is kept constant.

To solve the problem, we need to use the Gay Lussac's Law, which states that the pressure and the volume of an ideal gas are proportional  when the volume is kept constant.

Also, we need to remember that Gay Lussac's Law works with absolute temperature, so, we need to convert the given temperature (in celsius degrees) to Kelvin.

[tex]T(K)=273.15 + T(\°C)\\\\T(K)=273.15 +25=298.15K[/tex]

So, using the Gay Lussac's equation, we have:

[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]

Where,

[tex]P_1[/tex] is equal to the first pressure.

[tex]T_1[/tex] is equal to the first temperature.

[tex]P_2[/tex] is equal to the new pressure.

[tex]T_2[/tex] is equal to the new temperature.

We are given the following information:

[tex]P_1=0.96atm[/tex]

[tex]T_1=298.15K[/tex]

[tex]P_2=1.25atm[/tex]

Then, substituting and calculating, we have:

[tex]T_2=P_2*\frac{T_1}{P_1}\\\\T_2=1.25atm*\frac{298.15K}{0.96atm}=388.22K[/tex]

Hence, the new temperature of the gas is equal to 388.22 K.

Have a nice day!

Answer: the person up there had the correct answers so far, but didn’t complete it, but after converting it , finish it .

temperature in celcius - 388 K - 273 = 115 °C

answer is C. 115 °C

Final answer:

The correct statement is that in a concentration cell, the reactions are the same but the concentrations are different, which results in a cell potential greater than 0.00 volts until equilibration.

Explanation:

The correct statement about concentration cells is: The concentrations are different and the reactions are the same, so the cell potential is not 0.00 volts. Essentially, concentration cells consist of two half-cells with identical electrodes and the same redox active species at different concentrations. The standard electrode potential (E°) in a concentration cell is zero because the electrodes are identical; however, there is a potential difference, calculated with the Nernst Equation, due to varying concentrations. As the reaction in a concentration cell proceeds, the concentrations equilibrate and the cell potential (ΔEcell) decreases until the concentrations become equal and ΔEcell reaches zero.

Answer:

237.2 mL.

Explanation:

(XMV) acid = (XMV) base.

where, X is the no. of (H) or (OH) reproducible in acid or base, respectively.

M is the molarity of the acid or base.

V is the volume of the acid or base.

(XMV) HCl = (XMV) NaOH.

For HCl; X = 1, M = 0.5 M, V = ??? mL.

For NaOH, X = 1, M = 1.54 M, V = 77.0 mL.

∴ V of HCl = (XMV) NaOH / (XV) HCl = (1)(1.54 M)(77.0 mL) / (1)(0.5 M) = 237.2 mL.

Final answer:

When the air inside a milk carton warms up, air molecules move faster, leading to increased pressure which could cause the carton to expand or burst. Higher temperatures also accelerate the spoilage process of the milk, making it sour quicker.

Explanation:

If the air in a carton of milk is allowed to warm up, the kinetic energy of the molecules in the air would increase. This means that the air molecules would move faster and collide with more force. As per the kinetic-molecular theory, when the temperature of a gas increases, the molecules gain more energy and their motion (kinetic energy) increases, which in turn causes an increase in pressure if the gas is confined in a container like a milk carton.

This increase in pressure could lead to the carton expanding or even bursting if it does not have an appropriate way to vent the increased pressure. Additionally, in the context of the milk itself, a higher temperature would accelerate the spoilage process. Bacteria that cause milk to spoil reproduce more quickly at higher temperatures, leading to the milk souring in a shorter amount of time.