How many pounds of ice are required to absorb 4900 kJ of heat as the ice melts? The heat of fusion of water is 0.334 kJ/g.

According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus is specific allowed orbits.

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Resonance structures of cycloserine can be produced with the help of rotating arrows, produced with a carbocation in step 1 and the resultant resonance structure in step 2 after the double faced arrow.

An antibiotic called cycloserine was discovered in the bacterium Streptomyces orchidaceous. When treating tuberculosis, it is used with other medications. To depict the motion of the electrons in the "original" resonance structure, use curved arrows. By following the arrows, the "new" resonance structure should be a "product" that is automatically created. It will have two resonance structures as depicted in the image attached. Carbocation produced is the step 1 and the resultant compound is the step 2 in the image.

Resonance structures are collections of Lewis structures that explain how the electrons in a polyatomic ion or molecule become delocalized. Because molecules and polyatomic ions frequently have partial charges and fractional bonds, a single Lewis structure frequently falls short of explaining the bonding in a molecule or polyatomic ion.

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x = [-b (b2 - 4ac)]/2a is the solution to the quadratic equation ax2 + bx + c = 0. By using the plus and minus symbols in this formula, we are able to determine the two values of x. In light of this, there are two plausible values for x: [-b + (b2 - 4ac)]/2a and [-b - (b2 - 4ac)]/2a.

The simplest definition of a real solution in algebra is a solution to an equation that is a real number.

ax2 + bx + c = 0 is the quadratic equation's conventional form.

Since the discriminant is negative, the equation has zero real number solutions in its simplest radical form.

A linear equation is an identity if it can be solved by finding the solution to a true assertion, such as 0 = 0. All real numbers make up its solution set.

On both sides of the equation, combine like terms. Subtract x from both sides to isolate the x word. You reach the correct result, "3 Equals 3." It indicates that the equation's answer when you arrive at a true statement like this.

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Answer:

Explanation:

Sound energy: Crowd cheering

Chemical energy: Body converts nutrients into energy to run

Mechanical energy: The camera filming the photo

An example of the bimolecular elimination from the isomeric halogenated compound would be of Dehalogenation of 1,2-dibromoethane to form ethene and hydrogen bromide: H3C-CH2-Br2 --> H2C=CH2 + HBr.

Bimolecular elimination is a chemical reaction where two molecules react to form a new molecule and a neutral molecule. Isomeric halogenated compounds are compounds that have the same molecular formula but different structural arrangements.

For example, 1,2-dibromoethane and 1-bromo-2-chloroethane are isomers. Bimolecular elimination of these compounds can produce ethene and hydrogen halide (HBr or HCl) as the products. The specific product will depend on the isomeric halogenated compound and the reaction conditions.

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It is equal to the total mass of carbon dioxide and water used" as the substrates (CO2 and H2O) are just merely converted to the products (C6H12O6 and O2) with no mass being consumed or used as fuel for the reaction. In this reaction, energy is well conserved. The correct option is B

Photosynthesis can be defined as the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

Therefore the primary function of photosynthesis is to convert solar energy into chemical energy and then store that chemical energy for future use.

The balanced equation of photosynthesis is: 6CO2 + 6H2O + light energy = C6H12O6 + 6O2.

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Lewis dot structure is given in photo .

What is lewis dot structure ?

A Lewis point structure is a type of diagram used to show the distribution of electrons within a molecule or ion. This structure was first introduced in 1916 by chemist Gilbert N. Lewis. The structure consists of dots representing electrons surrounding the chemical symbols of the atoms in the molecule, indicating the number of bonds each atom can form. The dots are placed in pairs around the element symbol and represent the valence electrons (the electrons at the outermost energy level) of that element. The number of valence electrons of an element can be obtained from the periodic table.

Lewis point structures are used to predict the number and type of bonds that form between atoms in a molecule and to predict the shape of the molecule. By connecting the points of different elements in a molecule, the lewis structure can be used to determine the bond order, or the number of bonds between two atoms. Information about bond order, combined with the arrangement of atoms in space, can be used to determine the molecular structure of a molecule.

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The ideal gas law is a powerful tool for predicting the behavior of gases under a variety of conditions.

According to the ideal gas law, gases will behave most like an ideal gas when they are at low pressures and high temperatures.

This means that when the pressure is low and the temperature is high, the molecules of the gas will have more space to move around and they will have higher average speeds.

Under these ideal conditions, the gas will behave according to the predictions of the ideal gas law.

Additionally, the gas particles must be small and non-interacting, meaning that they do not interact with each other. When these factors are taken into account, a gas will most likely display the ideal gas properties predicted by the ideal gas law.

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The acceleration of the objection is 0.9375 m/s² if the players still push with a force of 150 N.

From the formula:

F = ma

a = F/m

a = 150/160

a = 0.9375 m/s²

Thus, the acceleration of the object is 0.9375 m/s² if the players still push with a force of 150 N.

The word 'force' has a very precise meaning. Force can be described as push or a pull. A force is not something that an object contains or has in it. A force is exerted on one object by another. The idea of a force is not confined to living things or non-living things.

The SI unit of force is the newton, symbolised as N. The base units suitable to force are: metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg. The second, unit of time — symbol s.

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The acceleration of the objection is 0.9375 m/s² if the players still push with a force of 150 N.

The word 'force' has a very precise meaning. Force can be described as push or a pull. A force is not something that an object contains or has in it. A force is exerted on one object by another. The idea of a force is not confined to living things or non-living things.

From the formula:

F = ma

a = F/m

a = 150/160

a = 0.9375 m/s²

Thus, the acceleration of the object is 0.9375 m/s² if the players still push with a force of 150 N.

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The molality of the solution is 3.125 m.

Let us recall that the boiling point of the solution is one of the colligative properties and the implication of this is that it depends on the amount of the substance that we can find in the solution.

Note that;

ΔT = K m i

ΔT =  Boiling point elevation

K = boiling constant

m = molality

i = Vant Hoff factor

Then;

ΔT = 101.6 - 100.0

= 1.6°C

Thus;

1.6 = 0.512 * m * 1

m = 1.6/0.512

m = 3.125 m

Thus the molality is 3.125 m

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The value of the H-C-H bond angle in ethylene is 117°.

The bond angle is a geometric angle that is formed due to the repulsion between atoms or electrons in a bond. The binding angle for a linear molecule is 180°, for a triangular planar molecule it is 120°, and so on.

The size of the bond angle is affected by the magnitude of the repulsive force of electron pairs in the molecule. The lone pair has a slightly stronger repulsive force than the bonding pair. This happens because the lone pair of electrons is only bound to one atom, so the movement is more flexible.

Determine the bond angles using VESPR theory, such as if the shape of the molecule AX means that it is linear with a bond angle of 180 degrees.

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Answer:

C) 100 kPa

The total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas. In this case, the partial pressure of the first gas is 70 kPa and the partial pressure of the second gas is 30 kPa. Therefore, the total pressure exerted by the mixture is 70 kPa + 30 kPa = 100 kPa. The answer is C) 100 kPa.

Explanation:

Based on the relationship between the number of turns of the coils and the strength of an electromagnet, the true options are:

The hypothesis was supported by the results of the experiment:

The correct option is II only.

The strength of the electromagnet rises with the number of turns in the coil.

This is due to the fact that as the coil "cuts" through the magnetic field, the sum of the individual emf s created by each turn increases with the number of coils turns.

The relative speed between the coil and magnet, as well as the magnet's strength, are additional elements that influence the strength of the induced current in a dynamo in addition to the number of coils. The intensity of the generated current increases with magnet strength and relative speed.

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Answer: carbon element

Explanation:

this is it

Answer:

0.32 moles of H2

Explanation:

I will assume the question concerns the production of water from hydrogen and oxygen(?).  If theis is correct, start with a balanced chemical reaction.

O2 + 2H2 = 2H2O  

2 O and 4 H on both sides of the reaction: it is balanced.

The balanced equation tells us we need 2 moles of H2 for every 2 moles of H2O, a 1:1 molar ratio.  If we want 4 moles of H2O, we'd need 4 moles of H2.

If we want 0.32 moles of H2O, we need 0.32 moles of H2.

Particle of Cu that Johnny produce is  2.7521 x 10²³ particles

A substance's mole is equivalent to 6.022 × 10²³ of that material (such as atoms, molecules, or ions). The term "Avogadro's number" or "Avogadro's constant" refers to the number 6.022 × 10²³.

To calculate the number of particles, first we Should calculate the moles of Cu

Moles of Cu = mass / mass molar

Moles of Cu = 29.02 g / 63.5 g/mole

Moles of Cu = 0.457 moles

The we can calculate the particle Cu that johnny produce

Particle Cu = moles x avogadro's number

Particles Cu = 0.457 moles x 6.022 x 10²³

Particles of Cu = 2.7521 x 10²³ particles

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The number of orbital in the third principal energy level nine.

What is principal energy level?

Principal energy level is a space that divide nucleus atom into a region with a certain levels. each of them has one sub level that contain only one s- orbital. In the s- orbital, the total electron available is 2 and determine as the lowest level because it is contain the lowest electrons. Each principal energy level after first energy level has one s- orbital with 3 p-orbital. Hence the third principal energy level contain 1 s- orbital, 3 p-orbital and 5 d-orbital or 1 + 3 + 5 total orbital. So, the total orbital of this level is 9.

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The mass of liquid oxygen needed to burn 134.8 g of B2H6 is 84.41 mL LOX.

Liquid oxygen is a form of oxygen in its liquid state. It is a colorless, odorless, and highly reactive substance that is composed of two oxygen atoms bonded together. It can be made by cooling oxygen gas in a cryogenic process to temperatures below -297°F (-183°C).

The combustion reaction of diborane requires 3 moles of oxygen for every 1 mole of diborane, so the mass of oxygen required to burn 134.8 g of B2H6 (1 mole) is:
3 moles of O₂ x (32.00 g/mol O₂) = 96.00 g of O₂
Since liquid oxygen (LOX) has a density of 1.141 g/mL, the mass of liquid oxygen needed to burn 134.8 g of B2H6 is:
96.00 g O₂ ÷ 1.141 g/mL = 84.41 mL LOX

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For the given plot of absorbance vs Concentration, the purple line is the best-suited line to characterize the black statistics points.

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The origin of replication (ORI) is a specific location on a DNA molecule where replication, the process of duplicating the DNA, begins.

The ORI is a unique sequence of nucleotides that serves as a starting point for the replication machinery. The ORI is where the replication enzymes bind, helicases, premises, and polymerases that unwind initiate, and elongate the replication process.

In prokaryotes, the ORI is often a specific sequence known as the replication origin sequence (oriC), which is conserved among different bacterial species. In eukaryotic cells, replication origins are dispersed throughout the chromosomes, and the exact location and mechanism of initiation are still not completely understood.

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Yellow color  represent  590 nm.

The atoms in a cold, diluted gas absorb light at particular frequencies, producing an absorption spectrum. Black lines (absence of light) are produced in the spectrum because the re-emitted light is unlikely to travel in the same direction as the absorbed photon.

When switching between two states, an atom, ion, or molecule absorbs photons with energies equal to the difference in the energies of the two states. The outcome is an absorbance spectrum showing the intensity of emission as a function of wavelength.

There are two types of absorption processes: chemical and physical, depending on whether the solute and solvent undergo a chemical reaction.

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Answer: part 1 of 2

1. The amount required of H₂ = 11.0 g.

2. The amount required of O₂ = 88.0 g.

Explanation:

The balanced equation for the mentioned reaction is:

2H₂(g) + O₂(g) → 2H₂O,

It is clear that 2.0 moles of H₂ react with 1.0 mole of O₂ to produce 2.0 moles of H₂O.

Q1: How much hydrogen would be required to produce 5.5 mol of water?

Using cross multiplication:

2.0 mol of H₂ produce → 2.0 mol of H₂O, from stichiometry.

??? mol of H₂ produce → 5.5 mol of H₂O.

∴ the no. of moles of H₂ needed to produce 5.5 mol of water = (2.0 mol)(5.5 mol)/(2.0 mol) = 5.5 mol.

Now, we can get the mass of H₂ needed to to produce 5.5 mol of water:

mass of H₂ = (no. of moles)(molar mass) = (5.5 mol)(2.0 g/mol) = 11.0 g.

Q2: How much oxygen would be required?

Using cross multiplication:

1.0 mol of O₂ produce → 2.0 mol of H₂O, from stichiometry.

??? mol of O₂ produce → 5.5 mol of H₂O.

∴ the no. of moles of O₂ needed to produce 5.5 mol of water = (1.0 mol)(5.5 mol)/(2.0 mol) = 2.75 mol.

Now, we can get the mass of O₂ needed to to produce 5.5 mol of water:

mass of O₂ = (no. of moles)(molar mass) = (2.75 mol)(32.0 g/mol) = 88.0 g.

A student heats 95.37 grams of copper to 99.24 °C and then drops it into a cup containing 78.54 grams of water at 22.14 °C She measures the final temperature to be 29.85 °C .  The calorimeter constant  is 1°C.

Given that :

Mass of copper = 95.37 g

Heat capacity = 0.44 J/ g °C

Temperature = 99.24 °C

Final temperature =  29.85 °C

Q copper = m c × ΔT

                = 95.37 × 0.44 × -69.39

                =  - 2773.8 J

Mass of water = 78.54 g

Heat capacity = 4.18 J/g °C

Q = 78.54 × 4.18 × 7.71

Q = 2787.6J

Q calorimeter = 13.8 J

Calorimeter constant = 13.8 J / 7.71 °C

                                   = 1 °C

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Answer:

The conversion of one form of energy into another, or the movement of energy from one place to another.

Explanation:

hope this helps

Answer: pears,  oatmeal, green beans, corn, oranges, black beans,bananas, asparagus

Answer: orbit?

Explanation:

This battery could be made stronger when we make lithium the anode and make zinc the cathode.

We know that the term electron affinity has to do with the fact the a specie is able to attract electrons. Hence, the specie that can be able to attract electrons is said to be have a greater electron affinity.

If we look at the order of the reactivity of the metals, we can see that the lithium has more tendency to exist as a positive ion as such the electron affinity of the lithium atom is very negative and it does not attract electrons.

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Answer:

B.

a pandemic would be like COVID-19 as it spread world wide

a epidemic would be like Japanese small pox incident because it was mostly in Japan

Everyday, save water. Reduce the length of your showers, patch any leaks, and switch off the flow when you're not using it. Instead of disposing of hazardous household chemicals into the drain, transport them to the a hazardous waste facility. Use resilient plants in your yard that require little to no watering, fertilizer, or pesticides.

Arthropods, including insects, are killed by insecticides. Mites can feed on both plants and animals are eliminated with miticides, also known as acaricides. Microorganisms known as microbial pesticides can kill, prevent, or outcompete pests like insects or even other microorganism pests.

Pesticides can have both acute, or short-term, negative health impacts, and chronic, or long-term, consequences, which can develop years or months after exposure. Examples of immediate health consequences include eye stinging, blisters, rashes, blindness, nausea, lightheadedness, diarrhea, and even death.

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Answer: The answer is : using a broom, and picking up litter  and pet waste.

Explanation: I just took the test and got a 100%,! that was my answer.

Answer:

Venus

Explanation:

From the sun outwards is   Mercury   Venus  Earth  and then Mars