How do homes lose thermal energy?
I need TWO reasons on why we want to reduce the thermal loose.​

Commercial airplanes have a cruising altitude between 9000 m and 12,000 m. At this altitude, air pressure is less than 0.3 atm. Technology has made flying at this altitude safe by air pressurization systems.

Pressurization systems constantly pump fresh, outside air into the fuselage. To control the interior pressure, and allow old, stinky air to exit, there is a motorized door called an outflow valve located near the tail of the aircraft.  Larger aircraft often have two outflow valves.

The valves are automatically controlled by the aircraft’s pressurization system. If higher pressure is needed inside the cabin, the door closes. To reduce cabin pressure, the door slowly opens, allowing more air to escape. It’s one of the simplest systems on an aircraft.

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Answer:

5 moles of Sodium are required to produce 5 moles of Sodium Chloride.

Explanation:

I am assuming you were not given an equation and this is a synthesis reaction.

Let's begin by writing a balanced chemical equation for the synthesis of sodium chloride.

2Na⁺ + Cl₂⁻ -> 2NaCl

Since Cl₂ exists as a diatomic molecule, we must have 2 +1 charges from Na to balance out the 2 -1 charges of Cl₂ (-1 for each Cl atom). This will then form 2 moles of NaCl.

To produce 5 moles of sodium chloride, we can multiply the entire equation by 2.5. This will result in:

5Na⁺ + 2.5Cl₂⁻ -> 5NaCl

The stoichiometric ratios of this new equation is:

5 Na: 2.5 Cl₂: 5NaCl

5 moles of sodium (Na) are required to produce 5 moles of sodium chloride (NaCl).

The formula that represents an unsaturated hydrocarbon is CnH₂n– 2 . Option B is correct.

Unsaturated hydrocarbons contain at least one carbon-carbon double or triple bond, which means they have fewer hydrogen atoms compared to saturated hydrocarbons with the same number of carbon atoms. The general formula for an alkene, which is a type of unsaturated hydrocarbon, is CnH₂n, while the general formula for an alkyne is CnH₂n– 2 .

Unsaturated hydrocarbons are more reactive than their saturated counterparts, and they can undergo addition reactions to form new compounds. They are also important in the synthesis of a variety of chemicals and materials, including plastics, synthetic rubber, and solvents.

Hence, B. CnH₂n– 2 is the correct option.

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Explanation:

molarity=no. of moles of solute/solution in litres

6.17M=no. of moles of solute/9.4 L

6.17×9.4=no. of moles of solute

57.9 =no. of moles of potassium fluoride KF

no. of moles=given mass /molar mass

57.9=given mass/58

3358.2 g

Answer:

This question lacks options, the options are:

A. Group C: 32.1 g, 35.0 g, 25.0 g

B. Group B: 25.5 g, 25.0 g, 24.8 g

C. Group A: 28.5g, 28.4 g, 28.5 g

D. Group D: 20.0 g, 25.0 g, 30.09

The answer is C. GROUP A

Explanation:

Precision in measurements refers to the degree of closeness between the repeated or measured values irrespective of how close they are to the true or accepted value, which is 25g in this case.

The precision of a measurement can be determined by simply finding the range (highest - lowest) of the measurements. The lowest range represents the most precise. The measurements for each group are:

Group C: 32.1 g, 35.0 g, 25.0 g

Range = 35.0 - 25.0 = 10g

Group B: 25.5 g, 25.0 g, 24.8 g

Range = 25.5 - 24.8 = 0.7g

Group A: 28.5g, 28.4 g, 28.5 g

Range: 28.5 - 28.4 = 0.1g

Group D: 20.0 g, 25.0 g, 30.09

Range = 30.09 - 25.0= 5.09g

Based on the ranges of the measurements in each group, one would notice that Group A has the lowest range (0.1g), hence, GROUP A is the most precise.

Answer: group A

Explanation: I got the answer right on my quiz.

Answer:

It says it in the text

Explanation:

Answer:

Covalent

Explanation:

C. Covalent

The type of bonding which  can be described as a "cooperation" is covalent bonding as there is sharing of electrons.

Covalent bonding is defined as a type of bonding which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.

Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.

Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.

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We have to determine the molecular formula of a compound. We know that its empirical formula is CH. To find the molecular formula we have to compare the molar mass of the empirical formula with the molar mass of the compound (65.09 g/mol).

Let's start determining the molar mass of the empirical formula. The atomic masses of C and H are:

C: 12.01 amu H: 1.01 amu

With those values we can calculate the molar mass of CH:

molar mass of CH = 1 * 12.01 + 1 * 1.01

molar mass of CH = 13.02 g/mol

If we divide the molar mass by the molar mass of the empirical formula we will get the relationship between them.

x = molar mass/molar mass of the empirical formula

x = 65.09 g/mol / (13.02 g/mol)

x = 5

Finally to get the molecular formula we have to multiply each element by that ratio.

Answer: C₅H₅ is the molecular formula.

Answer:

l and t

Explanation:

because they are in group one

Answer:

L & T

since are found in the same group.

Answer:

A. Solar, wind, hydro, nuclear, tidal, and biomass are renewable resources

B. Oil, coal, and natural gasses are the fossil fuels that are nonrenewable resources

C. It is important to move from nonrenewable to renewable because nonrenewable resources will run out and they also create greenhouse gases that hurt the enviroment and cause global warming. Renewable resources are cleaner and either don't run out, or replenish fast enough to not run out

During hyperventilation, the pH of the blood increases (becomes more alkaline), while the carbon dioxide (CO2) level decreases. These changes are consistent with the prediction.

Hyperventilation refers to an increased rate and depth of breathing, leading to the removal of excess carbon dioxide from the body. As a result, the concentration of carbon dioxide in the blood decreases. Carbon dioxide reacts with water to form carbonic acid (H2CO3), which dissociates into bicarbonate ions (HCO3-) and hydrogen ions (H+). By reducing the carbon dioxide level, there is less production of H+ ions, resulting in an increase in blood pH, making it more alkaline.

The observed changes in pH and carbon dioxide levels during hyperventilation are consistent with the predicted response. Increased ventilation causes more carbon dioxide to be expelled from the body, shifting the equilibrium of the carbonic acid-bicarbonate buffer system. As a consequence, the pH of the blood rises, leading to alkalosis. These changes can be confirmed through blood gas analysis or other diagnostic tests.

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Answer:

I think it's 78. I might be wrong I'm not sure.

Explanation:

The wavelength of an electron can be calculated using the formula: wavelength = h / (mass of electron * velocity). Since kinetic energy is equal to the mass of the electron multiplied by the velocity squared, we can also calculate wavelength by using the formula: wavelength = h / sqrt(2mass of electron kinetic energy).

To convert the kinetic energies given in electron volts (eV) to Joules (J), you can use the formula: 1 eV = 1.6 x 10^-19 J

(a) 20.0 eV = 3.2 x 10^-18 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-18 J) = 2.4 x 10^-12 m or 2.4 pm (picometers)

(b) 200 eV = 3.2 x 10^-17 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-17 J) = 2.4 x 10^-11 m or 24 pm

(c) 2.00 keV = 3.2 x 10^-14 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-14 J) = 2.4 x 10^-8 m or 2.4 nm

(d) 20.0 keV = 3.2 x 10^-13 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-13 J) = 2.4 x 10^-7 m or 24 nm

(e) 0.200 MeV = 3.2 x 10^-11 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-11 J) = 2.4 x 10^-5 m or 0.24 nm

(f) 2.00 MeV = 3.2 x 10^-10 J, wavelength = h / sqrt(2mass of electron3.2 x 10^-10 J) = 2.4 x 10^-4 m or 2.4 nm

A lower energy electron will have a longer wavelength, while a higher energy electron will have a shorter wavelength. To study the crystal structure of NaCl, you would need to use a technique such as X-ray diffraction, which typically uses X-rays with energies in the range of a few keV to a few tens of keV. Based on this, 2.00 keV and 20.0 keV energies are most suited for study of the NaCl crystal structure.

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This is a Charles' Law problem: V1/T1 = V2/T2. As the temperature of a fixed mass of gas decreases at a constant pressure, the volume of the gas should also decrease proportionally.

To use Charles' Law, the temperature must be in Kelvin (x °C = x + 273.15 K). We want to solve Charles' Law for V2, which we can obtain by rearranging the equation into V2 = V1T2/T1. Given V1 = 25 L, T1 = 1200 °C (1473.15 K), and T2 = 25 °C (298.15 K):

V2 = (25 L)(298.15 K)/(1473.15 K) = 5.1 L.  

The volume of this gas will be "5.1 L".

Given:

             \(= 1473 \ K\)

             \(= 298 \ K\)

As we know,

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

By substituting the values, we get

→ \(\frac{25 \ L}{V_2} = \frac{1473 \ K}{293 \ K}\)

→    \(V_2 = \frac{25\times 298}{1473} \ L\)

→         \(= 5.1 \ L\)

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The preparation of nitriles from alkyl halides are:

When alkyl halides react with NaCN (sodium cyanide) in the presence of a strong base, such as sodium hydroxide (NaOH), they undergo nucleophilic substitution (SN₂) to form nitriles. In the SN₂ mechanism, the nucleophile (CN⁻) attacks the alkyl halide, displacing the halogen atom and forming a new carbon-nitrogen bond.

NaCN is commonly used in this reaction because it provides the cyanide ion (CN⁻) as the nucleophile. The nucleophilic cyanide ion is attracted to the electrophilic carbon in the alkyl halide, facilitating the substitution reaction.

Methyl and primary alkyl halides are the most reactive substrates for this reaction. Due to their relatively unhindered nature, they allow for easier access of the nucleophile, resulting in higher yields of the desired nitrile product. Options A, D and E are correct.

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Egg whites are simply made frothy by adding air during the whipping process. It's a physical shift as they are still eggs whites—a material that has not changed. Yet in a chemical transformation.

To put it another way, a chemical always consists of the same "substance." There are some substances in nature, like water. Other chemicals, including chlorine, are produced

All of these things are made of chemicals, some organic and others manmade, including air, water, iron, fuel, clothes, stones, equipment, plastics, plants, and food. Chemicals can be made up of several distinct chemicals or they might be specific chemical molecule like water. Nitrogen, carbon, water, carbon dioxide, and other substances are all present in air.

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Answer:

i don't known i'm sorry

Explanation:

It is clear from the tabular data that, the monkeys in troop 2 were better to avoid predators and more of them  were able to reproduce. Hence, option D is correct.

In the biosphere, not all living things are fit to survive for a longer life time. Most of them are pray of other higher level animals. Some organisms adopt some strategies to hide from their predators and they can survive more.

It is clear from the table that, the monkeys residing in the ground are more prone to the attacks by their predators. Whereas monkeys living in trees can survive more.

In each year the survival rate is increasing for both troop. However the more number of monkeys which can sustain their population is in troop 2. Therefore, option D is correct.

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Answer: 29.16%

Explanation:

The total of 2 percentages need to equal 100% so we subtract the percent they gave us from 100.

Starting is one operational condition that a carburetor must be able to supply the proper fuel mixture for. The other four are  Idle, , Accelerator, variable load and speed operation.

Carburetor is the device that is used to mix fuel and air in an internal combustion engine. Its main objective is to provide quality air fuel for special operational requirements such as starting, idling, acceleration, adjusting variable load and speed operation.

The main disadvantage of float-type carburetor is its susceptibility to icing which occurs when there is fuel vaporization and decrease in air pressure in the venturi, which causes a sharp temperature drop in the carburetor. This fuel vaporization occurs within the cylinder of a fuel-injected engine and makes fuel injection system less susceptible to icing.

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Answer:

The gases produced escaped to the atmosphere.

To solve this, we must know each and every concept that is related to electrolytic solution. Therefore, In solution, an electrolyte produces ions. The correct option is option A.

In chemistry and physics, an electrolyte is a substance that conducts electric current by separating into positively and negatively charged particles known as ions, which migrate toward and are normally released at the negative and positive terminals.

Acids, bases, and salts are the most common electrolytes, which ionize when saturated in solvents such as water or alcohol. An electrolyte readily dissociates into ions in solution.

Therefore, in solution, an electrolyte produces ions. The correct option is option A.

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Answer:

B

Explanation:

Answer:

Explanation:

Asaturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved. Table salt (NaCl) readily dissolves in water.

Answer:

The balloon transport system or Hot Air Balloon is one of several transportation methods in RuneScape. During the Enlightened Journey quest it can be used for travel between two locations. After the quest is complete, four more locations are available to be unlocked by completing respective journeys to those locations.

Explanation:

transportation

When a gas expands to four times its initial volume at a constant pressure of 2.10 atm, the work done on the gas is 3,870.68 J. When the gas is compressed to two-thirds its initial volume at the same pressure, the work done on the gas is -467.49 J.

To determine the work done on the gas, we can use the equation:

Work = Pressure × Change in Volume

(a) Given that the gas expands to four times its initial volume while the pressure is constant, the change in volume is:

Change in Volume = 4 × Initial Volume - Initial Volume

Change in Volume = 4 × 6.50 m³ - 6.50 m³

Change in Volume = 25.00 m³ - 6.50 m³

Change in Volume = 18.50 m³

Using the equation for work, and considering that the pressure is constant at 2.10 atm:

Work = Pressure × Change in Volume

Work = 2.10 atm × 18.50 m³

Converting atm to joules using the conversion factor 1 atm = 101.325 J:

Work = 2.10 atm × 18.50 m³ × 101.325 J/atm

Work = 3,870.68 J

Therefore, the work done on the gas when it expands to four times its initial volume is 3,870.68 J.

(b) Similarly, if the gas is compressed to two-thirds its initial volume while the pressure is constant, the change in volume is:

Change in Volume = (2/3) × Initial Volume - Initial Volume

Change in Volume = (2/3) × 6.50 m³ - 6.50 m³

Change in Volume = 4.33 m³ - 6.50 m³

Change in Volume = -2.17 m³

Using the equation for work, and considering that the pressure is constant at 2.10 atm:

Work = Pressure × Change in Volume

Work = 2.10 atm × (-2.17 m³)

Converting atm to joules using the conversion factor 1 atm = 101.325 J:

Work = 2.10 atm × (-2.17 m³) × 101.325 J/atm

Work = -467.49 J

Therefore, the work done on the gas when it is compressed to two-thirds its initial volume is -467.49 J.

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Gallium (Ga, atomic number = 31) has 3 valence electrons, as indicated by the 4s² 4p¹ configuration. Valence electrons are the electrons located in the outermost energy level or shell of an atom, and they play a crucial role in determining the chemical properties and reactivity of an element.

Gallium's electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p¹. Valence electrons are the electrons in the outermost energy level, which in this case is the 4th energy level (4s² 4p¹).

Having three valence electrons, gallium (Ga) belongs to group 13. Therefore, the complete amount of electrons in the 4s and 4p subshells three in all can be lost in a chemical process.

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Answer:

They would be to heavy and you would be really stiff

Explanation:

Imagine walking in a suit made of iron or tin

You would feel like the Tin Man

You would be stiff

Metals are hard and heavy

The largest amount of AlCl₃ that could be produced from the reaction of solid aluminum Al and chlorine Cl₂ gas = 1.3 mol.

Write the equation that is properly balanced:

2Al(s) + 3Cl₂(g) ===> 2AlCl₃(s)

When both reactants are provided in equal proportions, you must first determine which one, if either, is the limiting one.

Al moles = 11.0

Cl₂ moles = 1.0

Al : Cl₂ has a mole ratio of 2:3, meaning that you require 1.5 times as much Cl₂ as Al.

Cl₂ is limiting in this situation since it alone will determine how much product is produced because this is NOT the case.

Since the question specifically asks for the quantity of AlCl₃ (in moles), we can simply apply dimensional analysis and stoichiometry to determine the solution:

= (2.0 mol Cl₂ x 2 mol AlCl₃) / (3 mol Cl₂)

= 1.3 mol

So, the largest amount of AlCl₃ that could be produced = 1.3 mol

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