What are greenhouse gases?

Gases that contribute to the greenhouse effect that include water vapor, nitrous oxide, methane, and carbon dioxide,


Gases that are released by greenhouses in people's backyards.


Gases that are beneficial to the Earth's atmosphere.


Isn't that a rock band?

An increase in pressure is converted into heat and work, explains the flow of energy in an internal combustion engine. Gasoline is ignited and consumed within an internal combustion engine (ICE) by the engine itself.

The engine then partially transforms the energy from combustion into work. The engine is composed of a fixed cylinder and a rotating piston. There are three main types of internal combustion engines in use today: the spark ignition engine, which is mainly used in automobiles; the diesel engine, which is used in heavy machinery and industrial systems and has an advantage over the more compact and lighter ones due to improvements in cycle efficiency.

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The enthalpy change (ΔH) for the reaction 3NO2(g) + H2O(l) -> 2HNO3(aq) + NO(g) is -1705.7 kJ.

To determine the enthalpy change (ΔH) for the given reaction, we can use Hess's Law, which states that the enthalpy change of a reaction is independent of the pathway taken and depends only on the initial and final states of the reaction.

We'll manipulate the given equations and their enthalpy changes to match the target reaction:

Reverse the third equation: 2NO(g) -> N2(g) + O2(g) (ΔH = -120.7 kJ)

Multiply the reversed third equation by 2 to balance the number of moles of NO(g): 4NO(g) -> 2N2(g) + 2O2(g) (ΔH = -241.4 kJ)

Multiply the first equation by 2 to balance the number of moles of NO2(g): 4NO2(g) -> 4NO(g) + 2O2(g) (ΔH = 4 × -177.7 kJ = -710.8 kJ)

Combine the first and second equations to match the target reaction:

4NO2(g) + 2H2O(l) -> 4NO(g) + 2O2(g) + 2H2O(l) -> 4NO(g) + 2O2(g) + 2H2O(l) -> 4HNO3(aq) (ΔH = -710.8 kJ + -284.1 kJ = -994.9 kJ)

Cancel out common species on both sides of the equation to obtain the target reaction:

3NO2(g) + H2O(l) -> 2HNO3(aq) + NO(g)

Now, the enthalpy change (ΔH) for the target reaction can be calculated by summing the ΔH values of the manipulated equations:

ΔH = -710.8 kJ + -994.9 kJ

ΔH = -1705.7 kJ

Therefore, the enthalpy change (ΔH) for the reaction 3NO2(g) + H2O(l) -> 2HNO3(aq) + NO(g) is -1705.7 kJ.

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a) The amount of the HCl will be more.

b) The Solubility product will be the higher.

c) The Molar solubility will be also higher.

a) The chemical equation is :

Ca(OH)₂ + 2HCl -------> CaCl₂ + H₂O

If the solid calcium hydroxide, Ca(OH)₂ is the together with the supernatant liquid, and there is the more Ca(OH)₂ than the expected for the saturated solution, the more the HCl titrant is used.

b) The chemical equation is :

Ca(OH)₂ <------> Ca₂ + 2OH⁻

The concentrations of the OH⁻ and the Ca²⁺ will be higher, then the solubility product will higher. The expression is :

Ksp = [Ca²⁺][OH⁻]²

c) The concentrations of the OH⁻ and the Ca²⁺ will be the higher, then, the molar solubility will be the higher.

The Molar solubility = [Ca²⁺] = 1/2[OH⁻]

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The equation derived from the combined gas law is option D: P₁V₁T₁ = P₂V₂T₂. Option D

The combined gas law combines Boyle's law, Charles's law, and Gay-Lussac's law into a single equation that relates the pressure, volume, and temperature of a gas sample. It allows us to analyze changes in these variables while keeping the amount of gas constant.

Boyle's law states that at a constant temperature, the pressure and volume of a gas are inversely proportional. In other words, if the volume of a gas decreases, its pressure increases, and vice versa. This is expressed as P₁V₁ = P₂V₂.

Charles's law states that at a constant pressure, the volume and temperature of a gas are directly proportional. If the temperature of a gas increases, its volume increases, and vice versa. This is expressed as V₁/T₁ = V₂/T₂.

Gay-Lussac's law states that at a constant volume, the pressure and temperature of a gas are directly proportional. If the temperature of a gas increases, its pressure increases, and vice versa. This is expressed as P₁/T₁ = P₂/T₂.

By combining these three laws, we obtain the combined gas law equation: (P₁V₁)/T₁ = (P₂V₂)/T₂. To eliminate the division, we can cross-multiply to get P₁V₁T₂ = P₂V₂T₁, which can be rearranged as P₁V₁T₁ = P₂V₂T₂.

This equation allows us to calculate the final values of pressure, volume, or temperature when any two of these variables change while the amount of gas remains constant. It is particularly useful in analyzing the behavior of gases under different conditions or when studying gas systems.

Option D

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Answer:

it was A for me.. don't know if this will help

Explanation:

The nuclear reaction shown above is an example of alpha decay. Alpha decay occurs when an unstable nucleus emits an alpha particle,
The correct answer is ,D. alpha decay.

In alpha decay, a heavy nucleus emits an alpha particle (a helium nucleus consisting of two protons and two neutrons) and decreases its atomic number by two and its mass number by four. In the given nuclear reaction, 224Th is decaying into 90Rn and emitting a helium nucleus, which is an alpha particle. Therefore, this is an example of alpha decay.

In this reaction, a ²²⁴Th nucleus decays into a ²²⁰Rn nucleus and a ⁴He nucleus (also known as an alpha particle). Alpha decay occurs when an unstable nucleus emits an alpha particle, which consists of 2 protons and 2 neutrons, resulting in a lighter daughter nucleus. This process reduces the atomic number by 2 and the mass number by 4. In this case, the atomic number goes from 90 (Th) to 88 (Rn), and the mass number goes from 224 to 220, confirming that this is an example of alpha decay.

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Answer:

It has a fixed volume it can also be compressed

Explanation:

1: A gases molecules don't move slow because they are not solid and are not compacted.

Answer:

It can be compressed

Explanation:

The Properties of Gases. Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.

Answer:

Explanation:

(12 x 104 ) x (5 x 10-²) = 6 x 10 ³ 6 x 105 6.0x10²

1.  (12 x 104 ) = 1248 or 1.248 x 10^3

2.  (1.248 x 10^3)(5 x 10^-2) = 6.240 x 10^1 or 60 rounded to 1 sig fig

I don't understand "= 6 x 10 ³ 6 x 105 6.0x10² "

Answer:

The answer isssssssssssssss DRUM ROLL PLEASEEE

Explanation:

B

Considering the definition of covalent bonds,  the correct answer is option b): atoms share valence electrons with neighboring atoms to reach a stable octect.

Covalent bonds are the forces that hold non-metallic atoms together. These atoms have many electrons at their outermost level (valence electrons) and have a tendency to gain electrons rather than give them up, to acquire the stability of the noble gas electronic structure. Therefore, non-metallic atoms cannot give electrons to each other to form ions.

In other words, a covalent bond is a force that joins two atoms of non-metallic elements to form a molecule. Atoms share pairs of electrons from their most superficial shell (called the valence shell) to achieve the stability of the molecule that has been formed with the bond and thus comply with the octet rule.

In summary, the correct answer is option b): atoms share valence electrons with neighboring atoms to reach a stable octect.

Learn more:

Answer:

freezing

Explanation:

because condensation is gas to liquid boiling is liquid to gas and sublimation is solid to gas

The molarity of the solution is 5.428 M, with 4 significant figures.

To calculate the molarity of a solution, we need to know the amount of solute (in moles) and the volume of the solution (in liters).

Molarity = moles of solute / volume of solution in liters

First, we need to calculate the amount of KCI in moles:

Mass of KCI = 101.00 g

Molar mass of KCI = 39 + 35.5 = 74.5 g/mol

Number of moles of KCI = mass / molar mass = 101.00 g / 74.5 g/mol = 1.357 mol

Next, we need to convert the volume of the solution to liters:

Volume of solution = 250.0 mL = 0.250 L

Finally, we can calculate the molarity:

Molarity = 1.357 mol / 0.250 L = 5.428 M

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The concentration progressively increased as the water from the solution evaporated. This is because the amount in the flask would stay the same but the amount of water would decrease.

The atomic weight of sodium chloride (NaCl) is 58.44, which equals 58.44 grammes. If you mix 1 litre of finished solution with 58.44g of NaCl.

One gramme of solute is present in a 100 milliliter final volume one percent solution. For instance, a 1% NaCl solution is made by dissolving 1 g of sodium chloride in 100 ml of distilled water.

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The pollutant that cannot be detected by its odor is carbon monoxide option (d). Carbon monoxide (CO) is a colorless and odorless gas, which makes it difficult to detect without specialized equipment.

Unlike other pollutants like sulfur dioxide (SO2) and nitrogen dioxide (NO2), which often have distinct and unpleasant odors, carbon monoxide is virtually odorless. This characteristic is one of the reasons why carbon monoxide is particularly dangerous, as it can accumulate without being easily detected, leading to potential health hazards.

The airborne material that is not likely to be affected by filters or indoor air handling equipment is carbon monoxide (d). Filters and indoor air handling equipment are primarily designed to capture and remove particulate matter, such as particles and soot (a and c), as well as pollen (b). These filters are generally not designed to remove gaseous pollutants like carbon monoxide. Carbon monoxide is a gas that requires specific detection and mitigation measures, such as the use of carbon monoxide detectors and proper ventilation systems, rather than relying solely on air filters for removal.

Carbon monoxide is an odorless gas that cannot be detected by its smell. Additionally, filters and indoor air handling equipment are not effective in removing carbon monoxide from the air.

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Answer: The kinetic energy of solids is limited to vibrational energies..the particles are tightly bound in their crystalline structure and can only bend, flex, and vibrate about relatively fixed position.  When vibrational energies exceed the strength of the force holding the particles together, the crystal structure collapses and we say the material melted.  The particles can now have, in addition to its vibrational energies, rotational energy.  Chunks of the collapsed crystal can, like a ball floating in water, rotate without showing much translational energy. Generally, we associate solids with vibrational kinetic energy, liquids with rotational kinetic energy, and gases with translational kinetic energy. Actually though, liquids have both vibrational and rotational energies, and gases have all three.

A graph can be defined as the graphical representation of data (information) on both the horizontal and vertical lines, which are called the x-axis and y-axis respectively.

In Science, there are different types of graph and these include:

The correct type of graph that can be used to depict their data sets are:

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To determine the amount of water and methane needed, we can set up a system of equations based on the desired composition of the mixture. you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

Let's assume x represents the number of gallons of water and y represents the number of gallons of methane. We have the following information: The total volume of the mixture is 90 gallons: x + y = 90. The mixture should be 60% methane: (y / (x + y)) * 100 = 60. Simplifying the second equation: y / (x + y) = 0.6. Now we can solve the system of equations: From equation 1, we can express x in terms of y: x = 90 - y. Substituting this into equation 2: y / ((90 - y) + y) = 0.6. Simplifying further: y / 90 = 0.6. Solving for y: y = 0.6 * 90. y = 54. Now we can find x using equation 1: x = 90 - y. x = 90 - 54. x = 36. Therefore, you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

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Answer:

phosphorous(iii) oxide

Explanation:

Hope this helps! :)

Answer:

Explanation:

a. CuO+ 2HCl⇒CuCl2+ H2O

b. \(n_{CuO}\)= \(\frac{4}{80}\)= 0,05 (mol)

⇒\(n_{CuCl2}\)= \(n_{CuO}\)=0,05 mol

⇒\(m_{CuCl2}\)= 0,05×135=6,75 (g)

c. \(n_{HCl}\)=2× \(n_{CuO}\)=0,1 (mol)

⇒\(m_{HCl}\)= 0,1×36,5= 3,65 (g)

⇒\(m_{dd HCl}\)= \(\frac{m_{HCl}}{10}\)×100=36,5 (g)

⇒ Nồng độ phần trăm dd sau phản ứng= Nồng độ % dd CuCl2=\(\frac{m_{CuCl2} }{m_{dd HCl+ m_{CuO} } }\)×100=\(\frac{6,75}{36,5+4}\) ×100≈ 16,67%

The best way to summarize the key results is to create diagrams and illustrations that enables one to study relationships between different data is a true statement.

Graphs and charts are useful visual aids because they make information accessible and quick to understand. Therefore, it is not unexpected that print and electronic media frequently use graphs.

When data is displayed as a graph rather than a table, it can often be easier to understand because the graph might show a pattern or comparison.

Therefore, the use of diagrams and illustrations is an efficient method of data presentation.

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The best way to summarize the key results is to create diagrams and illustrations that enables one to study relationships between different data. True or false.

Answer:

c. 800.0 mL

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In a reaction sequence involving an alkyne and reagents, step 1) deprotonates the alkyne using a strong base, then forms a new carbon-carbon bond with an electrophilic alkene, and lastly adds an alcohol across the double bond via oxymercuration-demercuration. The major product is an alcohol, but its specific structure depends on the starting materials.

The given reaction sequence involves the following steps:

NaNH₂

Eti H-C=C—H

HgSO₄, H2SO₄, H2O, R-OH

Step 1) involves the treatment of an alkyne with NaNH₂, which is a strong base. The base will deprotonate the alkyne to form an anion.

Step 2) involves the reaction of the alkyne anion with Eti H-C=C—H. The alkyne anion acts as a nucleophile and attacks the electrophilic alkene, forming a new carbon-carbon bond.

Step 3) involves the addition of HgSO₄, H2SO₄, H₂O, and an alcohol (R-OH). This reaction is known as oxymercuration-demercuration and involves the addition of a mercuric acetate (Hg(OAc)₂) across the double bond of the alkene. This forms a mercurinium ion, which is then attacked by water in a nucleophilic addition reaction. Finally, the mercuric acetate is removed by reaction with sodium borohydride, resulting in the formation of the alcohol product.

The major product expected from this reaction sequence is the alcohol formed in step 3). The specific structure of the alcohol cannot be determined without more information about the starting materials.

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Complete question :

Choose the major product that is expected for the following reaction sequence: 1) NaNH₂ 2) Eti H-C=C—H 3) HgSO H₂SO₄ H₂0 R 0. OH

The temperature at which 4 moles of hydrogen gas would exert a pressure of 256 KPa is 431.4 K

The temperature of the gas can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

Divide both side by nR

T = PV / nR

T = (2.53 × 56) / (4 × 0.0821)

T = 431.4 K

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If a solution is prepared by dissolving 16.30 g of ordinary sugar in 43.90 g of water. The boiling point of the solution is approximately 100.555 °C.

To calculate the boiling point of the solution, we can use the equation:
ΔTb = Kb * m
where ΔTb is the change in boiling point, Kb is the molal boiling point elevation constant, and m is the molality of the solution.

First, we need to calculate the molality of the solution. Molality (m) is defined as the number of moles of solute per kilogram of solvent. We have 16.30 g of sugar (sucrose) and 43.90 g of water, we need to convert these masses to moles. The molar mass of sucrose is 342.3 g/mol, so we can calculate the number of moles of sucrose:
moles of sucrose = mass of sucrose / molar mass of sucrose
= 16.30 g / 342.3 g/mol
= 0.0476 mol

Similarly, we can calculate the number of moles of water:
moles of water = mass of water / molar mass of water
= 43.90 g / 18.02 g/mol
= 2.437 mol

Now, we can calculate the molality of the solution:
molality (m) = moles of sucrose / mass of water (in kg)
            = 0.0476 mol / 0.0439 kg
            = 1.084 mol/kg

Next, we need to identify the molal boiling point elevation constant (Kb). The Kb value for water is 0.512 °C/m.
Now, we can calculate the change in boiling point (ΔTb):
ΔTb = Kb * m
= 0.512 °C/m * 1.084 mol/kg
= 0.555 °C

Finally, to identify the boiling point of the solution, we add the change in boiling point (ΔTb) to the normal boiling point of water (100 °C):
Boiling point of the solution = Normal boiling point of water + ΔTb
= 100 °C + 0.555 °C
= 100.555 °C

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Answer:

no. of protons=8

no. of neutrons=8

no. of electrons=10

Explanation:

Answer:

Chlorophyll makes plants green.

Enzymes are responsible for dictating what chemical changes happen and when, so thus they control the life process of the cells in our bodies.

The cell wall is what gives a plant cell it's distinct shape (animal cells don't have cell walls btw).

Intracellular fluid, or cytosol, is the fluids stored in the Intracellular compartment.

The cell membrane is the barrier between everything inside the cell, and everything else outside of it. It protects the contents of the cell from harm and releases toxins and other waste from it. The cell membrane is basically like the gate keeper of the cell.

Explanation:

Hope this helps, I tried :)

Answer: Pluto

Explanation: Ok, so Pluto is the farthest. It is 3.7 billion miles away from our sun.

The answers include the following:

This is referred to as the largest organ in the body which has a rich network of nerves and blood vessels and is responsible for protecting the body from pathogens and other foreign bodies.

Living organisms such as humans have different skin colors and is based on the amount of the protein known as melanin present in it .The color of the skin of a chicken wing ranges from white to yellow and is attached to the subcutaneous tissue.

This type of tissue is responsible for connecting the skin to the muscles and bones which are present in the body so as to perform functions necessary for the survival of the animal.

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Answer:

what? that's 66 total, 6 more elliptical machines, a 1 to 1.2 ratio

but I don't know what else you would mean

Answer:

5:6

Explanation:

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