is the center of an atom is called the nucleus?​

The balanced molecular equation for the reaction between sodium hydroxide (NaOH) and aluminum chloride (\(AlCl_3\)) in aqueous solution can be written as follows: 2NaOH(aq) + 3\(AlCl_3\)(aq) → 3NaCl(aq) + \(Al(OH)_3\)(s)

In this reaction, sodium hydroxide (NaOH) reacts with aluminum chloride (\(AlCl_3\)) to form sodium chloride (NaCl) and aluminum hydroxide (\(Al(OH)_3\)). The coefficients in the balanced equation indicate the stoichiometric ratio between the reactants and products.

The physical states of the substances are indicated by the symbols (aq) for aqueous solutions and (s) for the solid precipitate.

The reaction is a double-displacement reaction, also known as a precipitation reaction. Double-displacement reactions involve the exchange of ions between two compounds, resulting in the formation of a precipitate.

In this case, sodium hydroxide and aluminum chloride react to form sodium chloride and aluminum hydroxide, with aluminum hydroxide being the white solid precipitate.

It's worth noting that the actual reaction might involve hydrated forms of the compounds, such as NaOH·x\(H_2O\) and \(AlCl_3\)·y\(H_2O\). However, for simplicity, these hydrated forms are not included in the balanced equation.

Overall, the balanced equation represents the chemical reaction between sodium hydroxide and aluminum chloride, showing the reactants, products, and their stoichiometric ratios.

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Answer:

Can be produced 288mL of SO₂

Explanation:

Based in the reaction:

P₄S₃ + 8O₂ → P₄O₁₀ + 3SO₂

Where 1 mole of tetraphosphorus trisulfide reacts producing 3 moles of sulfur dioxide gas.

0.869g of tetraphosphorus trisulfide (Molar mass of P₄S₃: 220.09g/mol) are:

0.869g P₄S₃ ₓ (1mol / 220.09g) = 3.948x10⁻³ moles of P₄S₃

As 3 moles of SO₂ are produced per mole of P₄S₃:

3.948x10⁻³ moles of P₄S₃ ₓ (3 moles SO₂ / 1 mole P₄S₃) = 0.0118 moles SO₂

Using PV = nRT

V = nRT / P

Where n are 0.0118 moles, R gas constant (0.082atmL/molK), T absolute temperature (21.0°C + 273.15K = 294.15K), and P pressure (751torr / 760 = 0.988atm).

Replacing:

V = 0.0118molₓ0.082atmL/molKₓ294.15K / 0.988atm

V = 0.288L = 288mL

Answer:

Explanation:

Slow but able to move past one another

Answer:

B. It tells whether products or reactants are favored at equilibrium.

Answer:

Ba + Cr + O₄

The volume of hydrogen gas produced in the reaction of 73 grams of zinc and 73 grams of hydrochloric acid (under normal conditions) is approximately 22.4 liters.

To calculate the volume of hydrogen gas produced in the reaction of zinc and hydrochloric acid, we need to use the principles of stoichiometry and the ideal gas law.

First, let's write the balanced chemical equation for the reaction between zinc (Zn) and hydrochloric acid (HCl):

Zn + 2HCl →\(ZnCl_2\)+ H2

From the equation, we can see that one mole of zinc reacts with two moles of hydrochloric acid to produce one mole of hydrogen gas. To determine the number of moles of zinc and hydrochloric acid, we need to convert the given masses into moles.

The molar mass of zinc (Zn) is approximately 65.38 g/mol, so 73 grams of zinc is equal to:

73 g Zn * (1 mol Zn / 65.38 g Zn) ≈ 1.116 mol Zn

Similarly, the molar mass of hydrochloric acid (HCl) is approximately 36.46 g/mol, so 73 grams of HCl is equal to:

73 g HCl * (1 mol HCl / 36.46 g HCl) ≈ 2.002 mol HCl

According to the balanced equation, the reaction produces one mole of hydrogen gas for every two moles of hydrochloric acid. Therefore, since we have 2.002 moles of HCl, we expect to produce half that amount, or approximately 1.001 moles of hydrogen gas.

To calculate the volume of hydrogen gas, we can use the ideal gas law, which states:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. In this case, we assume the reaction is conducted under normal conditions, which means a pressure of 1 atmosphere and a temperature of 273.15 Kelvin.

Rearranging the equation to solve for V, we have:

V = nRT / P

Substituting the values, we get:

V = (1.001 mol) * (0.0821 L·atm/(mol·K)) * (273.15 K) / (1 atm) ≈ 22.4 L

Therefore, the volume of hydrogen gas produced in the reaction is approximately 22.4 liters.

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The volume of air you might inhale (and exhale) in 8.00 hours is approximately 1903.2 liters.

To calculate the volume of air you might inhale (and exhale) in 8.00 hours, we need to determine the total number of breaths you take in that time and then multiply it by the volume of each breath.

First, let's calculate the number of breaths in 8.00 hours:

Number of breaths per minute = 13

Number of breaths per hour = 13 breaths/minute * 60 minutes/hour = 780 breaths/hour

Number of breaths in 8.00 hours = 780 breaths/hour * 8.00 hours = 6240 breaths

Now, let's calculate the volume of air in liters:

Volume of each breath = 0.305 liters

Volume of air inhaled and exhaled in 8.00 hours = Volume of each breath * Number of breaths in 8.00 hours

Volume of air inhaled and exhaled in 8.00 hours = 0.305 liters/breath * 6240 breaths = 1903.2 liters

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In the reaction 239/93 Np -> 239/94 Pu + X, the symbol "X" represents an electron. Option C is correct.

This reaction involves the radioactive decay of Neptunium-239 (239/93 Np) into Plutonium-239 (239/94 Pu). Specifically, it undergoes beta decay, which involves the emission of an electron.

During beta decay, a neutron in the Neptunium-239 nucleus is converted into a proton, and an electron (also known as a beta particle) is emitted. The electron carries a negative charge (-1) and is represented by the symbol "e^-" or simply "e". It balances the charge and atomic number in the reaction equation.

The balanced equation for the reaction is:

239/93 Np -> 239/94 Pu + 0/-1 e

So, in summary, the symbol "X" in the reaction 239/93 Np -> 239/94 Pu + X represents an electron (e^-) emitted during the beta decay of Neptunium-239.

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COMPLETE QUESTION

in the reaction 239/93 Np -> 239/94 Pu+X, what does X represent

A. PROTON

B. POSITRON

C. ELECTRON

D. NEUTRON

Answer:

solubility

Explanation:

Answer:

12.044  × 10²³ atoms of oxygen

Explanation:

Given data:

Number of atoms of oxygen = ?

Moles of oxygen = 2 mol

Solution:

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms of oxygen

2 mole × 6.022 × 10²³ atoms of oxygen / 1 mole

12.044  × 10²³ atoms of oxygen

The change in the internal energy of the system is +69 J, indicating that the system has gained energy.

The change in internal energy of the system can be calculated using the First Law of Thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system on its surroundings.

In this case, the system receives 57 J of energy as heat, which means that the heat is added to the system, and the value is positive (+57 J). On the other hand, the system does 12 J of work on the surroundings, which means that the work is done by the system, and the value is negative (-12 J).

Using the First Law of Thermodynamics, we can calculate the change in internal energy of the system as:

ΔU = Q - W

ΔU = (+57 J) - (-12 J)

ΔU = 69 J

Therefore, the change in the internal energy of the system is +69 J, indicating that the system has gained energy.

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The density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.

To determine the density of ammonia gas (NH3) in a 6.0 L container at a pressure of 820 mm Hg, we need to use the ideal gas law equation, which relates pressure, volume, number of moles, and temperature for a given gas.

The ideal gas law equation is:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Since we are given the pressure (820 mm Hg), volume (6.0 L), and assuming standard temperature and pressure (STP), we can use the values for R (0.0821 L·atm/(mol·K)) and convert the pressure to atm by dividing by 760 (1 atm = 760 mm Hg).

820 mm Hg / 760 mm Hg/atm = 1.08 atm

Now we can rearrange the ideal gas law equation to solve for density (d):

d = (P * M) / (RT)

Where M is the molar mass of ammonia (NH3), which is approximately 17.03 g/mol.

Substituting the values, we have:

d = (1.08 atm * 17.03 g/mol) / (0.0821 L·atm/(mol·K) * 298 K)

Simplifying the equation, we find:

d ≈ 0.805 g/L

Therefore, the density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.

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Answer:

Explanation:

The lattice energy (LE) of MgCl₂ can be calculated using the Born-Haber cycle, which relates the lattice energy to other thermodynamic quantities such as enthalpy of sublimation, ionization energy, electron affinity, and heat of formation.

The equation for the lattice energy of MgCl₂ is:

LE(MgCl₂) = H(sublimation of Mg) + IE(Mg) + EA(Cl) + 1/2 H₂(Cl₂) - DH(f)(MgCl₂)

where H(sublimation of Mg) is the enthalpy of sublimation of Mg, IE(Mg) is the ionization energy of Mg, EA(Cl) is the electron affinity of Cl, H₂(Cl₂) is the heat of formation of Cl₂, and DH(f)(MgCl₂) is the heat of formation of MgCl₂.

We are given the following equations:

Mg(g) → Mg2+(g) + 2 e ΔH₁ = +2188 kJ/mol

Cl(g) + e → Cl-(g) ΔH₂ = -337 kJ/mol

Mg(s) + Cl₂(g) → MgCl₂(s) ΔH₃ = -642 kJ/mol

Using these equations, we can calculate the values of H(sublimation of Mg), IE(Mg), EA(Cl), H₂(Cl₂), and DH(f)(MgCl₂) as follows:

H(sublimation of Mg) = ΔH₂(Mg(g)) + 1/2 ΔH₃(Cl₂(g)) - ΔH₁(Mg2+(g)) = -2220 kJ/mol

IE(Mg) = ΔH₁(Mg(g)) = +2188 kJ/mol

EA(Cl) = ΔH₂(Cl(g)) = -337 kJ/mol

H₂(Cl₂) = 0 (since Cl₂ is in the gas phase)

DH(f)(MgCl₂) = ΔH₃(Mg(s), Cl₂(g), MgCl₂(s)) = -642 kJ/mol

Substituting these values into the equation for the lattice energy, we get:

LE(MgCl₂) = -2220 + 2188 - 337 + 1/2(0) - (-642) = -3509 kJ/mol

Therefore, the lattice energy of MgCl₂ is approximately -3509 kJ/mol.

If a certain ore is 21.3% nickel by mass. The number of kilograms of this ore would you need to dig up to have 20.0 g of nickel is: 93.897 kg.

Using this formula to determine the  mass of ore

Mass of ore = Mass of nickel / Percentage of nickel by mass

Convert the percentage to decimal form by dividing it by 100

0.213 = 21.3%.

So,

Mass of ore = (20.0 g) / (0.213)

Mass of ore = 93.897 kg

Therefore the  mass of ore is 93.897 kg.

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250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.

w/v = [ mass of solute (g) / volume of solution (mL) ] × 100

5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100

volume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100

volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100

volume of solution (mL) = [ 125 g / 0.05 ] x 100

A faraday is equal to one mole of electric charge. Because each aluminum ion gains 3 electrons, 0.1 faraday of charge will reduce 0.1/3 moles of aluminum, or 0.033 moles of aluminum.

What is meant by aluminum ?

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Answer:

OC. The potential energy lost by the reaction system (C) is gained by

the surroundings.

Explanation:

The potential energy lost by the reaction system (C) is gained by the surroundings. Therefore, the correct option is option C.

Energy is the ability to perform work in physics. It could exist in several different forms, such as potential, kinetic, thermodynamic, electrical, chemical, radioactive, etc. Moreover, there is heat and work, which is energy being transferred through one body to the other. Energy is always assigned based on its nature once it has been transmitted.

Motion is a property of all energy types. For instance, if a body is moving, it possesses kinetic energy. Even while at rest, a tensioned object like a spring or bow has the ability to move; this is because of its design, which includes potential energy. The potential energy lost by the reaction system (C) is gained by the surroundings. This explains how energy is conserved during this chemical reaction.

Therefore, the correct option is option C.

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Both Ca(OH)₂ (calcium hydroxide) and NaOH (sodium hydroxide) are examples of strong bases.

A base is a substance that can accept protons (H) or donate hydroxide ions (OH) in a chemical reaction. strong bases completely dissociate in water, releasing hydroxide ions.

In the case of Ca(OH)₂, when it is dissolved in water, it dissociates into calcium ions and hydroxide ions  The hydroxide ions make it a strong base.

Similarly, NaOH, when dissolved in water, completely dissociates into sodium ions (Na+) and hydroxide ions (OH-), making it a strong base as well.

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Answer:

sulfate

Explanation:

because it is anions

We can find the number of moles using the molarity formula:

We have to convert 250 mL to L. Remember that 1 liter equals 1000 mL:

Now, that we have the value of volume in liters (0.25 L) and the molarity (0.0666 M (mol/L) ), we can clear in the formula for moles and replace the given values:

The answer is that we have 1.66 x 10^(-2) moles in 0.25 L of 0.0666 M of CH3CH2Cl.

Answer:

Kindly check explanation

Explanation:

The force applied is directly proportional to the distance moved by an object, the larger the applied force, the greater the distance moved.

a = f/m

a = acceleration ; f = applied force ; m = mass

From the relation, we can see that acceleration is directly proportional to force applied.

The ball will travel farthest with the greatest applied force while, nearest distance will be attained with the smallest applied force.

The distance covered is affected by both the mass of the object and the applied force

Answer:

A molecular formulae________

will tell you how many and what

kinds of atoms are in a molecule, but not how they are

arranged.

To solve this problem, we need to use the equation ratio.

The equation gives us that if 1 mole of C6H12O6 is consumed, 6 moles of O2 are consumed.

So:

1 mole of C6H12O6 ---- 6 moles of O2

We don't need to do any calculations, the equation gives us the answer.

Answer: 1 mole of C6H12O6 is consumed.

Answer:

•Molecular formula = emprical formula × n

•n= Molar Mass÷ Emprical formula mass

===========

Given Molar Mass= 39g

Emprical formula mass of CH =12+1= 13 g

-> n = 39 / 13

=3

Now Molecular formula= emprical formula × n

=CH × 3

=C3H3

Answer:

1.alleviates boredom

2.sink

3.planet Krypton

4.American-style crosswords

5.Pho U

6.Southbound - 5 a.m. to 11 a.m. Northbound - 11:15 a.m. to 11 p.m. Closed: 11 p.m. - 5 a.m.

7.Asia is the largest and most populous continent in the world, sharing borders with Europe and Africa to its West, Oceania to its South, and North America to its East.

8.Retinoids. This term is used for vitamin A compounds, such as retinol and retinoic acid. These ingredients have long been used topically to help repair sun-damaged skin and reduce fine lines and wrinkles.

9.he Sam Browne belt is named after Sir Samuel James Browne, VC. Browne began his service in India in April 1849 as Second in Command of the 2nd Regiment of Punjab Cavalry, the unit which also later took his name (22nd Sam Browne's Cavalry). ... The belt had two shoulder pieces when a pistol was added.

10.graf

11. You can recognize a genuine Guylian Sea Shell by the Guylian G- stamp on every chocolate. Their marbled and beautifully shining shell is made of a unique mix of Belgian milk, dark and white chocolate. Look at our chocolates very closely and you'll notice that not two seashells have exactly the same marbling pattern.

12.Opposite of characterized by economy and good management of money and resources. spendthrift. wasteful.

13.In the meantime, it's believed that the planet's total helium supply is running dry. If our supply ran out, it could spell the end of MRI testing, LCD screens and birthday-party balloons. Or it could make all of those things much more expensive.

14.Beryllium is unique in both the diversity of its portfolio and the patience with which it invests. With only a single investor to satisfy

15.Mickey Mouse. Pluto is a cartoon character created by The Walt Disney Company. He is a yellow-orange color, medium-sized, short-haired dog with black ears. Unlike most Disney characters, Pluto is not anthropomorphic beyond some characteristics such as facial expression. He is Mickey's pet.

16.Elemental Manipulation is a branch of magic and spells that, like it suggests, involves the four elements: Earth, Air, Fire and Water. This is the only type of magic Wizards could use during the Wizard Competition.

17.Examples include the Beatles, an intentional misspelling of "beetles", the Byrds, and Led Zeppelin, in which "led" was deliberately misspelled to make clear it is pronounced /lɛd/ (as in the metal lead) rather than the other pronunciation of "lead", /liːd/.

18.Name of a goofy convict - Silicon - Si. 14. Mr. Mony's enemy - Antimony - Sb. 15. What you do to flowers - Platinum - Pt.

19.Sophia Rose Stallone is the oldest sister being born in Miami, Florida, on August 27, 1996 which makes her 24. Middle sister Sistine Rose Stallone, 22, was born in Los Angeles, California, on June 27, 1998. ... The sisters also have two half-brothers from dad Sylvester's first marriage.

Explanation:

Answer:

im going to go with the water is less dense than the glycerol

Explanation:

Answer:

E. all of the above

Explanation:

Equilibrium is a balanced and stable state in a system. It can be achieved through homeostasis, steady-state, opposing forces, and feedback.

Answer:

The correct answer is - option D.  Ar, P, Si, Mg, Na

Explanation:

The atomic radius of an atom can be defined as half of the distance of the nucleus of two atoms in a diatomic molecule which is represented by r. This can be measure by measuring the distance of the nuclei in a diatomic molecule and divide it by 2.

Argon (Ar) - 0.71 Å

Phosphorus (P) - 0.98 Å

Silicon (Si) - 1.11 Å

Magnesium (Mg) - 1.45 Å

Sodium (Na) - 1.9 Å

Atmic radii is decreses as moving from left to right across a period in periodic table.