The nucleus is held closely together by?

Answer:

Ken is planting vegetables in his garden. He has 20 seeds. Determine whether 20 is prime or composite number. If it is composite, list all of the ways Ken can arrange the seeds in even rows.

Mineral resources can play a significant role in determining the success or failure of a town will boom or become a ghost town is important because the presence or absence of valuable minerals can significantly impact the town's economic growth and sustainability.

Mineral resources are valuable commodities that can bring economic growth and development to a town. Towns that are rich in mineral resources, such as gold, silver, copper, and coal, often experience a boom in their economy as mining companies invest in the area and provide job opportunities for the local population. This influx of income can lead to increased business activity, higher property values, and improved infrastructure, all of which contribute to the overall prosperity of the town.

If a town has abundant and easily accessible mineral resources, it can attract mining industries, creating job opportunities and stimulating the local economy. This can lead to a population increase, more businesses, and overall economic growth, resulting in a booming town. On the other hand, if mineral resources are scarce or depleted, mining industries may leave, leading to job loss and economic decline. This can cause people to move away in search of better opportunities, leaving behind abandoned buildings and infrastructure, ultimately turning the town into a ghost town.

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The number of moles of NaCl present in 276.50 mL of 1.55 M NaCl solution is 0.429 mol.

To find the number of moles of NaCl in a given solution, we can use the formula: moles of solute = concentration of solution x volume of solution We are given the following information:Concentration of solution = 1.55 MVolume of solution = 276.50 mL

To use this formula, we need to convert the volume of the solution from milliliters (mL) to liters (L).1 L = 1000 mLTherefore, 276.50 mL = 0.27650 LNow, we can substitute the given values in the formula and calculate the number of moles of NaCl present in the solution:moles of solute = concentration of solution x volume of solution= 1.55 M x 0.27650 L= 0.429 molTherefore, there are 0.429 moles of NaCl in 276.50 mL of 1.55 M NaCl solution. Hence, the correct option is 0.429.

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Enthalpy, in a technical sense, refers to the internal energy needed to create a system as well as the energy needed to create space for it by establishing its pressure, volume, and displacing its surroundings.

In a thermodynamic system, energy is measured by enthalpy. Enthalpy is a measure of a system's overall heat content and is equal to the system's internal energy plus the sum of its volume and pressure.

A state function that is entirely based on state functions P, T, and U is how enthalpy is also described.

Here the equation used is:

q = n × ΔH

n = Mass / Molar mass

n = 253 / 122.55 = 2.064 mol

q =  2.064 × -91 = -187.82 kJ

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If a second-period diatomic molecule has 16 electrons in its valence shell (total of 2s and 2p electrons), the predicted bond order of the molecule would be 2

Number of bonding electrons= 10

Number of antibonding electrons= 6

Bond order = (10−6)/2

∴ Bond order = 2

What is bond order?

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The pressure inside a container that contains 25 grams of argon is 0.34 atm.

The pressure inside a container can be calculated using the following expression;

PV = nRT

Where;

According to this question, 25 grams of argon in a container has a volume of 60 liters and at a temperature of 400 K.

P × 60 = 0.625 × 0.0821 × 400

60P = 20.525

P = 0.34 atm

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Answer: 310K

Explanation: I got it right

Answer:

310 k

Explanation:

Hope this helps

Answer:

Bigger particals first but I would say rocks or pebbles

Explanation:

During flood, when the stream slows down, the clay and sand sediments will deposited first sinc particle size is small.

Flood is a natural calamity where, the water reservoirs overflows to the land area and leads to destruction in buildings and houses. The results depends on the speed of water flow.

Flood occurs due to the pressure difference beneath water and due to heavy rain. There are many more evidences, that flood caused significant losses in land areas in many coutries.

The flow of particles with the stream bed depends on their size and weight. The massive particles will only flow and sediment when the stream flows with greater speed. Thus, sand and clay particles sediment first and other heavy particles will flow slowly and deposit later.

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Answer:

b

Explanation:

b because it's a physical change

Answer:

1) Conditions necessary for rusting are:

a) Presence of atmospheric oxygen or air

b)Presence of water or moisture

2) For protecting the iron gate, we can paint it because the paint will coat it and protect it from atmospheric oxygen and water.

3) Magnesium, Carbon and Oxygen (MgCO₃)

Answer:

Magnesium Hydroxide or Milk of Magnesia

Explanation:

The chemical sign for Magnesium is Mg, and OH automatically means Hydroxide.

There are 16 mol of carbon atoms in 4 mol of C4H8O2

The chemical formula C4H8O2 tells us that each molecule of this compound contains 4 carbon atoms, 8 hydrogen atoms, and 2 oxygen atoms. Therefore, to determine the number of carbon atoms in 4 mol of C4H8O2, we need to multiply the number of moles by the number of carbon atoms per molecule:

Number of carbon atoms = number of moles × number of carbon atoms per molecule

Number of carbon atoms = 4 mol × 4 carbon atoms per molecule

Number of carbon atoms = 16 mol

So there are 16 mol of carbon atoms in 4 mol of C4H8O2. It's important to note that the chemical formula of a compound gives us information about the ratio of atoms in the compound, which allows us to determine the number of atoms in a given amount of the compound.

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Answer:

To be honest I’d don’t even know

Explanation:

Because I’d said so

Boyle's Law states that at constant temperature, the volume of a gas is inversely proportional to its pressure. This law can be explained through the kinetic-molecular theory of gases, which proposes that gases consist of particles in constant, random motion.

The pressure of a gas is determined by the force exerted by these particles as they collide with the walls of their container. When the volume of a gas is reduced, the particles are forced to occupy a smaller space, resulting in more frequent collisions with the walls of the container and a higher pressure.

Conversely, when the volume of a gas is increased, the particles have more space to move around, resulting in less frequent collisions with the walls and a lower pressure. This relationship between volume and pressure, as described by Boyle's Law, is therefore a result of the behavior of gas particles predicted by the kinetic-molecular theory.

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Answer:

75000 Hz

Explanation:

f = V / λ (f= frequency, v=velocity of wave, lambda= wavelength)

alternatively, f = c / λ (f= frequency, c= speed of light- 3.00x10^8 m/s, lambda= wavelength)

f= [3.00x10^8 m/s]/[4000 m]

=75000 Hz

Answer:

The number of electrons, in turn, determines the chemical properties of the atom.

Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element.

Electrons have a negative charge. Since the atom is electrically neutral, the number of electrons must equal the number of protons.

The electrons arrange themselves in energy levels around the nucleus. The outermost or valence electrons of an atom are the ones that take part in chemical reactions. An element’s chemical properties depend on its valence electrons.

Explanation:

The proper order is Na > Mg > Si > P > Ar. As a result of the valence electrons' low nucleostatic attraction, sodium (Na) has the biggest atomic radius.

The electrons' orbitals get bigger and bigger as we go from top to bottom, increasing the atomic size.S and Ar are hence real. S is the largest element on the periodic table since it is on the left. Na has the most atoms of any of the other elements mentioned. Due to its position to the right of silicon, phosphorus will have a lower atomic radius for an uncharged atom than silicon. Due to its position to the right of silicon, phosphorus will have a lower atomic radius for an uncharged atom than silicon. The atomic radius grows in a group from top to bottom and decreases across a period, as seen in the figures below. The smallest element is therefore helium, whereas the largest is francium.

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AgI: AgI is insoluble in water. This is because it is a salt composed of a silver ion (Ag+) and an iodide ion (I-). Generally, compounds containing Ag+, Pb2+, and Hg2+ ions are insoluble in water, except when they are combined with certain anions, such as NO3- or CH3COO-. In the case of AgI, the iodide ion is not one of those anions, so it does not form a soluble compound.

(b) Na2CO3: Na2CO3 is soluble in water. This is because it is a salt composed of sodium ions (Na+) and carbonate ions (CO32-). Generally, compounds containing alkali metal ions (e.g., Na+, K+) and the ammonium ion (NH4+) are soluble in water, except when they are combined with certain anions, such as OH- or CO32-. In the case of Na2CO3, it is the sodium ion that determines the solubility, and since it is an alkali metal ion, the compound is soluble.

(c) BaCl2: BaCl2 is soluble in water. This is because it is a salt composed of barium ions (Ba2+) and chloride ions (Cl-). Generally, compounds containing Group 1A and ammonium ions are soluble in water, except when they are combined with certain anions, such as sulfate (SO42-), hydroxide (OH-), or sulfide (S2-). In the case of BaCl2, the chloride ion is not one of those anions, so it forms a soluble compound.

(d) Al(OH)3: Al(OH)3 is insoluble in water. This is because it is an ionic compound composed of aluminum ions (Al3+) and hydroxide ions (OH-). Generally, compounds containing metal hydroxides are insoluble in water, except for those of the alkali metals and certain alkaline earth metals (such as Ca2+ and Sr2+).

(e) Zn(CH3COO)2: Zn(CH3COO)2 is soluble in water. This is because it is a salt composed of zinc ions (Zn2+) and acetate ions (CH3COO-). Generally, compounds containing zinc ions are soluble in water, except when they are combined with certain anions, such as sulfate (SO42-) or sulfide (S2-). In the case of Zn(CH3COO)2, the acetate ion is not one of those anions, so it forms a soluble compound.

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Answer:

1-T

2-F

3-T

4-T

Explanation:

big brain

Answer:

✔ octane

CH3CH2CH2CH2CH2CH2CH2CH3

✔ butane

CH3CH2CH2CH3

✔ methane

CH4

✔ decane

CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3

✔ ethane

CH3CH3

Explanation:

An alkane contains only carbon and hydrogen. The following are the accurate names of the compounds;

An alkane is a compound whose only functional group is the carbon - carbon single bond. This compounds contain only carbon and hydrogen.

The correct names of the compounds are;

CH3CH2CH2CH2CH2CH2CH2CH3 - octane

CH3CH2CH2CH3 - butane

CH4 - methane

CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3 - decane

CH3CH3 - ethane

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Answer: 5 atm

Explanation: The total pressure of a mixture of gases is given by the Ideal Gas Law: PV = nRT, where P is the total pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in kelvins.

In a constant temperature scenario, where the volume and the number of moles of the gases are kept constant, the total pressure of the mixture is simply the sum of the individual pressures of the gases. So in this case, the total pressure will be 2 atm + 3 atm = 5 atm.

Answer:

If you're asking H+

The answer would be chemical

Explanation:

The third ball of 5 grams of mass will make the biggest crater in the sand because force is directly proportional to mass. so the greeter the mass, the greater its force and impact.

Mass is described as the quantity of matter in a physical body.

Mass is also a measure of the body's inertia, the resistance to acceleration when a net force is applied.

Mass is always known to be constant for a body. We can calculate mass by:

Mass = volume × density.

Weight is the measure of the gravitational force acting on a mass. The SI unit of mass is the "kilogram"

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Answer:

An atom contains equal numbers of protons and electrons .

Answer:

glycerin

Explanation:

the amind acid of glycrine is 0.18 g/MLA.

Uno de los componentes del “sal de uvas”, es el bicarbonato de sodio, es un sólido cristalino blanco, debido a su capacidad de neutralizar el exceso de ácido clorhídrico del estómago.

La acidez estomacal es ocasionada por un exceso en la producción de ácido clorhídrico (HCl) en el jugo gástrico del estómago. Uno de los componentes del “sal de uvas”, utilizada como antiácido, es el bicarbonato de sodio (NaHCO₃), es un sólido cristalino blanco, que neutraliza el exceso de ácido clorhídrico. La reacción de neutralización es:

HCl(aq) + NaHCO₃(aq) ⇒ NaCl(aq) + H₂O(l) + CO₂(g)

Uno de los componentes del “sal de uvas”, es el bicarbonato de sodio, es un sólido cristalino blanco, debido a su capacidad de neutralizar el exceso de ácido clorhídrico del estómago.

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The statement that describes the formation of galaxies is "Gravity causes stars to cluster."

What is galaxies ?

The statement that describes the formation of galaxies is "Gravity causes stars to cluster."

Galaxies form from the accumulation of gas, dust, and dark matter through the force of gravity. As the gas and dust in a galaxy cluster together, they begin to collapse under their own gravity, forming stars. Over time, these stars cluster together and form galaxies. Therefore, the correct statement that describes the formation of galaxies is gravity causes stars to cluster.

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Approximately 1.50 moles of peanuts in 9.00 * 10^{24} peanuts

To answer your question, we will use the concept of moles, which is a unit of measurement in chemistry that helps to relate the number of particles (in this case, peanuts) to a more manageable and comparable quantity.
First, we need to know the number of peanuts in one mole. This value is known as Avogadro's number, which is approximately 6.022 * 10^{23} particles per mole. Now, we will use this information to calculate the number of moles of peanuts in the given amount.
Step 1: Identify the given amount of peanuts:
9.00 * 10^{24} peanuts
Step 2: Divide the given amount of peanuts by Avogadro's number:
\frac{9.00 * 10^{24} peanuts) }{ (6.022 * 10^{23} peanuts/mole)}
Step 3: Perform the calculation:
(\frac{9.00 }{ 6.022}) * (\frac{10^{24 }10^{23}) ≈ 1.495
Step 4: Round the answer to a reasonable number of significant figures (in this case, three):
1.50 moles

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The number of electrons, protons, and neutrons in argon is 18, 18 , and 22 respectively, the number of electrons , protons and neutrons in sulphur-32 is 16, 16, 16 respectively. The number of protons, neutrons, and electrons are 6 , 8 and 6. And for uranium-238 , 92 protons , 92 electrons and 146 neutrons.

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