Using 21st-century technology, hydrogen fusion requires temperatures around 10^8 K. But, lower initial temperatures are used if the hydrogen is compressed. In the late 24th century, the starship Leinad uses such methods to fuse hydrogen at 10^6 K.(d) How much more energy is generated by the fusion in (c) than by the hydrogen-antihydrogen collision in (b)?(c) If the heated H atoms of part (b) fuse into⁴He atoms (with the loss of two positrons per ⁴He formed), how much energy (in J) is generated?(b) How many H atoms are heated to 1.00X10⁶ K from the energy of one H and one anti-H atom annihilating each other?

The experimental set up in B is to observe the growth the green beans without the addition of fertilizer. Thus, we can compare the growth of the plant with and without fertilizer and thereby we can understand the effect the fertilizer on the plant growth.

Fertilizers are chemical substances used to nourish the plants by making the soil rich in nutrients and minerals. Plants needs minerals along with water such as potassium, calcium, phosphorous, nitrogen etc.

Sometimes the soil comes deficient of these minerals and we have to fertilize the soli by the addition of the chemicals containing these minerals. Hence, fertilizers provide a nutrient rich soil for plant growth.

The experimental set up with fertilizer added plant and the second one (B) without fertilizer helps to compare the growth in both conditions and we can clearly understand how fertilizers effect the growth of plants by comparing the plant growth in A and B.

To find more on fertilizers, refer here:

https://brainly.com/question/24196345

#SPJ1

To reach break point chlorination in a 96,000 gallon pool with a difference of 0.4 ppm between the free chlorine and total chlorine levels, approximately 7.68 ounces of chlorine is needed.

To calculate the amount of chlorine needed to reach break point chlorination in a 96,000 gallon pool, we first need to find the difference between the total chlorine and free chlorine levels. Break point chlorination is achieved when the free chlorine level equals the total chlorine level.

Given that the free chlorine level is 1.4 ppm and the total chlorine level is 1.8 ppm, the difference between them is:

1.8 ppm - 1.4 ppm = 0.4 ppm

Now, we need to determine the amount of chlorine required to raise the free chlorine level by 0.4 ppm in a 10,000 gallon pool. The given information states that it takes 2 ounces of dry chlorine (67% concentration) to raise a 10,000 gallon pool's chlorine level by 1 ppm.

To calculate the amount of chlorine required to raise the free chlorine level by 0.4 ppm in a 10,000 gallon pool, we can set up a proportion:

2 ounces / 1 ppm = X ounces / 0.4 ppm

Solving for X (the amount of chlorine needed for 0.4 ppm increase in a 10,000 gallon pool):

X = (2 ounces / 1 ppm) * 0.4 ppm = 0.8 ounces

Now, we can calculate the amount of chlorine needed for the 96,000 gallon pool by scaling the chlorine required for the 10,000 gallon pool:

Amount of chlorine needed = (0.8 ounces / 10,000 gallons) * 96,000 gallons

Amount of chlorine needed = 0.8 ounces * 9.6 = 7.68 ounces

Therefore, approximately 7.68 ounces of chlorine is needed to reach break point chlorination in the 96,000 gallon pool.

For more such question on chlorination. visit :

https://brainly.com/question/24218286

#SPJ8

Electron configuration of Cu - [Ar] 3d¹⁰ 4s¹

Electron configuration of F - [He] 2s2 2p5

Electron configuration of K - [Ar] 4s¹

We have to note that the electronic configuration of the atom has to do with the way that electrons are arranged in the orbitals of the atom. We know that the electrons are arranged in orbitals and that the orbits as well as the orbitals are found to be at various energy levels.

The quantum numbers has to do with the numbers that can help us to describe the position of the electron that is present in the atom.

Learn more about electron configuration:https://brainly.com/question/29757010

#SPJ1

The Schrödinger equation describes an atom's electronic wave function and energy levels. n, l, and ml are the three quantum numbers that identify the energy level, shape, and orientation of atomic orbitals. The values of n, l, and ml are integers that must satisfy certain constraints.

The principal quantum number (n) is the first quantum number that defines an atom's energy level. The angular momentum quantum number (l) specifies the shape of the electron cloud in an atom's orbitals. The magnetic quantum number (ml) specifies the orientation of the cloud, which corresponds to the direction of electron spin.

According to the above quantum numbers, the orbital's designation is 4f. The maximum value of l for a given n is n-1. Therefore, when n=4, l can range from 0 to 3, which implies that the atom can have s, p, d, and f orbitals. Because l=3, the subshell is designated f.

This subshell has a complex shape with two nodal planes passing through the nucleus. Furthermore, because ml=-2, the orbital's orientation is determined. It specifies that the subshell is aligned in a plane perpendicular to the z-axis, resulting in four equivalent lobes of electron density oriented in the xy plane.

The 4f orbital is one of the seven f orbitals, which can hold a maximum of 14 electrons. It is not included in the ground-state electron configuration of any of the naturally occurring elements since all elements have filled 1s, 2s, 2p, 3s, 3p, 4s, and 3d orbitals before 4f orbitals become available.

To know more about Schrödinger equation here

https://brainly.com/question/31642338

#SPJ11

Answer:

15.0 L

Explanation:

To find the volume, you need to use the Ideal Gas Law:

PV = nRT

In this equation,

-----> P = pressure (mmHg)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas constant (62.36 L*mmHg/mol*K)

-----> T = temperature (K)

To calculate the volume, you need to (1) convert grams C₄H₁₀ to moles (via the molar mass), then (2) convert the temperature from Celsius to Kelvin, and then (3) calculate the volume (via the Ideal Gas Law).

Molar Mass (C₄H₁₀): 4(12.011 g/mol) + 10(1.008 g/mol)

Molar Mass (C₄H₁₀): 58.124 g/mol

32 grams C₄H₁₀              1 moles
-------------------------  x  -----------------------  = 0.551 moles C₄H₁₀
                                    58.124 grams

P = 728 mmHg                      R = 62.36 L*mmHg/mol*K

V = ? L                                    T = 45.0 °C + 273.15 = 318.15 K

n = 0.551 moles

PV = nRT

(728 mmHg)V = (0.551 moles)(62.36 L*mmHg/mol*K)(318.15 K)

(728 mmHg)V = 10922.7632

V = 15.0 L

Answer:

The dependent variable is the amount of hairballs tallied up at the end of each week.

The independent variable is the brushing of the cats hair. because the person controls that.

The constants are the amount of food, feeding time, playing amount, and the amount of weeks.

Explanation:

The amount of hairballs tallied up is the dependent variable because it is influenced by the independent variable which is brushing the cats hair. The person brushes their cats hair in hopes to reduce the amount of hairballs they find in the week.

Approximately 0.628 grams of aluminum are required to react with 35 ml of 2.0 M hydrochloric acid.

To determine the grams of aluminum required to react with 35 ml of 2.0 M hydrochloric acid (HCl), we need to consider the stoichiometry of the balanced chemical equation.

The molar ratio between HCl and aluminum (Al) in the balanced equation is 6:2, which means 6 moles of HCl react with 2 moles of aluminum. From the given concentration of HCl (2.0 M) and volume (35 ml), we can calculate the moles of HCl:

moles of HCl = concentration × volume

              = 2.0 M × 0.035 L

              = 0.07 moles

Using the stoichiometry ratio, we can determine the moles of aluminum required:

moles of Al = (2/6) × moles of HCl

                = (2/6) × 0.07

                = 0.0233 moles

Finally, we can convert the moles of aluminum to grams using its molar mass (26.98 g/mol):

grams of Al = moles of Al × molar mass

              = 0.0233 mol × 26.98 g/mol

              = 0.628 g

Therefore, approximately 0.628 grams of aluminum are required to react with 35 ml of 2.0 M hydrochloric acid.

learn more about hydrochloric acid here:

https://brainly.com/question/14006357

#SPJ11

The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).

The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.

There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.

More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.

Thus, the correct option is E.

Learn more about HPLC: https://brainly.com/question/13490391

#SPJ11

(a) Nonpolar covalent compound: O2 , (b) Polar covalent compound: HBr, (c) Nonpolar covalent compound: H2O and (d) Nonpolar covalent compound: I2 .

Nonpolar molecules are molecules that have no electrical charge and a symmetrical distribution of electrons. This means that the molecules have a uniform distribution of electrons around its nucleus, creating no electrical imbalance. Nonpolar molecules are not attracted to other molecules, so they tend to be more stable and have lower boiling points than molecules with electrical charges. Examples of nonpolar molecules include methane, carbon dioxide, and hydrogen. Nonpolar molecules are also hydrophobic, meaning they do not mix with water, so they tend to be less soluble in water than polar molecules.

To learn more about Nonpolar

https://brainly.com/question/1426521

#SPJ4

Explanation:

Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of compound by the molar mass of the compound expressed in grams.

Answer:

B

Explanation:

The muscular and nervous systems enable the involuntary breathing mechanism. The main muscles in inhalation and exhalation are the diaphragm and the intercostals (shown in blue), as well as other muscles. Exhalation is a passive action, as the lungs recoil and shrink when the muscles relax.

According to IUPAC nomenclature, the longest chain of this compound contains 7 carbons. Hence, the name of this compound is 4 -propyl-5-ethyl-5-phenyl heptane.

IUPAC rules are used to name the organic compounds. As per this rule, the compound is named based on the chain containing highest number of carbon atoms. The substituents are named with their prefix or suffix.

For the given compound, the longest chain contains 7 carbon atoms. Hence, the chain is named as heptane. The substituents are numbered in such a way that, they have the least possible number.

The 4th carbon contains a propyl group and a phenyl group and ethyl groups are attached on the 5th position in the longest chain. Therefore, the name of the compound is  4 -propyl-5-ethyl-5-phenyl heptane.  

Find more on IUPAC rules:

https://brainly.com/question/27915542

#SPJ1

The mass number is the atomic mass rounded to a whole number, i.e., which is a value that rounds the atomic weight to a near number.

The expression mass number is used in chemistry to denote the total amount of subatomic particles i.e. atomic protons and neutrons, which are present in a given atom (for example hydrogen has only one proton and one neutron).

Therefore, with this data, we can see that mass number denotes the overall amount of protons and neutrons present in a given atom, which is equal to one in the hydrogen atom

Learn more about the mass number here:

https://brainly.com/question/28409714

#SPJ1

PbCl2 is a sparingly soluble salt with a low Ksp value of 1.6 x 10-5. This means that it has a tendency to remain in its solid state rather than dissolving in water. The solubility of PbCl2 depends on the presence of other ions in the solution, which can affect the equilibrium of the dissociation reaction.

In this case, we can use the common ion effect to determine which of the given solutions would be least favorable for the dissolution of PbCl2. The common ion effect states that the addition of a common ion to a solution reduces the solubility of a salt.

Out of the given options, solution D, 0.1 M NaCl, has the highest concentration of a common ion, Na+, which is also present in PbCl2. This high concentration of Na+ ions would reduce the solubility of PbCl2 by shifting the equilibrium towards the solid state. Therefore, solution D would be the least favorable for the dissolution of PbCl2.

In contrast, pure water (option B) would be the most favorable for the dissolution of PbCl2 as it does not contain any common ions that could interfere with the solubility of the salt. The other solutions (A, C, and E) have lower concentrations of common ions than solution D and would have a moderate effect on the solubility of PbCl2.

To know more about  solubility  visit:

brainly.com/question/31493083

#SPJ11

The equilibrium concentration of the chloride ion is greatest in 0.1 M \(NaNO_3\), which suggests that 0.1 M \(NaNO_3\) would be the second least soluble solution for \(PbCl_2\). Option C is Correct.

The equilibrium concentrations of the lead and chloride ions are similar in the other solutions, so they are all similarly soluble in  \(PbCl_2\).  \(PbCl_2\) is a white powder that is soluble in water and other polar solvents. However, it is relatively insoluble in nonpolar solvents such as ethanol, ether, and hexane.

In order to determine which solution would be least soluble in  \(PbCl_2\), we can use the solubility product constant (Ksp) for  \(PbCl_2\) to calculate the equilibrium concentration of the lead and chloride ions in each solution.

The solubility product constant (Ksp) for  \(PbCl_2\) is given by:

Ksp = [Pb2+][Cl-]

The equilibrium constant (K) for the dissolution of  \(PbCl_2\) in a solution can be calculated using the following equation:

[Pb2+] = [ \(PbCl_2\)] / [Cl-]

Substituting the values for Ksp and [ \(NaNO_3\)] from the equation above, we can calculate the equilibrium concentrations of the lead and chloride ions in each solution:

Pb2+ = [ \(PbCl_2\)] / [Cl-]

\(Pb2+ = (1.6 * 10{^-5)} / (1.0 * 10{^-14})\\Pb2+ = 1.35 * 10^{-6} M\\Cl- = [PbCl_2] / [Pb2+]Cl- = (1.6 * 10{^-5) }/ (1.35 * 10^{-6})}\\Cl- = 1.2 * 10^{-5} M\)

The equilibrium concentrations of the lead and chloride ions are similar in the other solutions, so they are all similarly soluble in  \(PbCl_2\).  

Learn more about solution visit: brainly.com/question/25326161

#SPJ4

The specific structure of the alcohol would depend on the nature of the carbonyl compound used as the starting material.

The compounds containing a carbonyl group (the -C=O group) are called carbonyl compounds.

The carbonyl group, C=O, is probably the most important functional group in organic chemistry. These compounds are an integral part of organic chemistry and their primary members are called aldehydes, ketones, and carboxylic acids.

The reaction you are describing is a reduction reaction using lithium aluminium hydride (LiAlH4) as the reducing agent. The main organic product of this reaction would be the corresponding alcohol. Here is the balanced reaction equation:

Starting Material: Carbonyl bonded to benzene and OCH₃

LiAlH4 + Carbonyl compound -> Alcohol

In this case, the carbonyl group (C=O) will be reduced to a hydroxyl group (OH). The benzene and OCH₃ groups will remain unchanged.

The main organic product of this reaction would be an alcohol compound resulting from the reduction of the carbonyl group. The specific structure of the alcohol would depend on the nature of the carbonyl compound used as the starting material.

Learn more about Carbonyl Compounds

https://brainly.com/question/17422534

#SPJ4

It is directly inversely proportional to the square of the vibration's amplitude. The loudness of the sound will be doubled if the sound wave's amplitude doubles.

Loudness is inversely proportional to amplitude squared. As a result, a three-fold increase in amplitude results in a nine-fold increase in loudness. The sound is considered loud if the sound wave's amplitude is high.

The relationship between the wave's amplitude and frequency is such that they are inversely proportional to one another. Increasing frequency causes a decrease in amplitude. As the frequency drops, the amplitude rises.

To know more about sound visit:-

brainly.com/question/25601579

#SPJ1

Answer:

the best answer would be A

Explanation:

cause it contains a red colored compound.

Answer:

the answer is C neutral

Explanation:

if the ph is lower then 7 its acidic

if its higher then 7 its basic

and a ph of 7 is neutral

Answer: There are few or no clouds.

Explanation: When there are little to no clouds, it generally signals the presence of a high-pressure system, which means that residents can expect fair weather and no precipitation. Certain clouds, such as low-level, short, cumulus clouds, indicate that fair weather is moving into the area

Answer:

They are similar, because one can be obtained by dilating the other about the origin with a scale factor of 1/2.

Explanation:

The image is dilated by 1/2.

Take a look.

The coordinate labels of the preimage include: A, B, C, and D.

The coordinate labels of the image include: A', B', C', and D'.

Coordinates of point A: (2, 8)

Coordinates of point A': (1, 4)

**The preimage's x and y-coordinates multiplied by 1/2 will give you the x and y-coordinates of the image.**

Answer:

Colony

Explanation:

AnsThe option C is correct

The molality of chloride ions is 4.63kg/L

Data;

Mole Fraction of MgCl2 = 0.04

The sum of mole fraction = 1

Mole fraction of water = 1 - 0.04 = 0.96

since the total number of moles = 1

Number of moles of MgCl2 = mole fraction * total number of moles

Number of moles of MgCl2

\(0.04 * 1 = 0.04 moles\)

Number of moles of water =

\(0.96 * 1 = 0.96 moles\)

1 moles of MgCl2 = 2 moles of Chloride ions

Number of moles of chloride ions

\(2 * 0.04 = 0.08 moles\)

Number of moles of water = 0.96moles

mass of water = molecular weight * number of moles

mass of water =

\(18 * 0.96 = 17.28g\)

let's convert this to kilogram

\(1000g = 1kg\\17.28g = x\\x = 0.01728kg\\\)

The molality of the ions in the solution is

\(M = \frac{mass of solute}{volume of solution} \\M = \frac{0.08}{0.01728} =4.63 kg/L\)

The molality of chloride ions is 4.63kg/L

Learn more on molality of ions here;

https://brainly.com/question/10278982

Answer:

C

Explanation:

As the size of a star increases, luminosity increases. If you think about it, a larger star has more surface area. That increased surface area allows more light and energy to be given off.

in this question, we are given with the pressure at initial point i.e. 15 psi that undergoes compression from 470ml of volume to 260 ml.

We are asked to determine the final pressure after the compression.

For that we'd consider the Boyle's law that states that, for a gas in an iso-thermic system Pressure is inversely proportional to the Volume.

which means with the increase in Pressure, Volume of gas will reduce.

At constant Temperature, product of Pressure and Volume will be constant.

PV =  constant.

for same system at different pressure volume condition, we can say that-

\(P_{1}V_{1} = P_{2}V_{2}\)

\(P_{1} = 15psi\\ V_{1} = 470ml\\ V_{2} = 260ml\)

(15)(470) / (260) = \(P_{2}\)

Final Pressure = 27.11 psi

To know more about Boyle's law:

brainly.com/question/1437490

#SPJ4

Answer:

\(at \: stp : \\ 22400 \: ml \: are \: occupied \: by \: 71 \: g \: of \: chlorine \\ 563 \: ml \: will \: be \: occupied \: by \: ( \frac{563}{22400} \times 71) \:g \\ = 1.78 \: g\)

Answer:

( j ) should be the correct option because atomic number of fluorine is 9 so, no. of electrons and protons should be same I.e. 9

Answer:

Model A

Explanation:

Model A represents an atom that is more reactive than the others represented.

Valence electrons actually determine the reactivity of elements. They also determine the properties of elements.

Elements with one valence electron are highly reactive because they need low energy to remove them. They can either gain more electrons to become stable or they share/give out their electrons.

Therefore, Model A is the correct answer because it has one valence electron and its valence electron is farther from the nucleus thereby this makes it more reactive.

Answer:

A

Explanation:

It is the most reactive because it have to gain more electrons.

Answer:

C) He

Explanation:

Helium is one of the noble gases and contains a full valence shell. Unlike the other noble gases in Group 8, Helium only contains two valence electrons.

Answer:

0.0250 dm 3.

Explanation:

Volume of sodium hydroxide solution = 25.00 ÷ 1000 = 0.0250 dm 3. Amount of sodium hydroxide = 0.100 × 0.0250 = 0.00250 mol. From the equation, 0.00250 mol of NaOH reacts with 0.00250 mol of HCl