The gold nucleus has a diameter of 14.0 fm. what is the density of matter in a gold nucleus? express your answer with the appropriate units

Answer:

\(volume = \frac{mass}{density} \\ \)

The most likely cause of earthquakes that occur in the area shown on the map is due to fault lines in the earth's crust.

Earthquakes are natural phenomena characterized by the shaking or trembling of the Earth's surface.

They occur due to the sudden release of energy in the Earth's crust along fault lines, which creates seismic waves that propagate through the Earth.

The Earth's crust is composed of several large tectonic plates that float on the semi-fluid layer of the Earth's mantle.

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True, MDMA (ecstasy) is a close chemical relative of methamphetamine.

Both drugs belong to the amphetamine family, which means they share some similarities in their chemical structure. However, MDMA and methamphetamine have different effects on the body and brain. Methamphetamine is a highly addictive stimulant that increases the levels of dopamine in the brain, leading to feelings of euphoria and intense pleasure. MDMA, on the other hand, is a synthetic drug that has both stimulant and hallucinogenic properties. It enhances the release of serotonin and oxytocin, which results in feelings of empathy, love, and bonding with others. Although both drugs can be harmful and have potential side effects, MDMA is less addictive than methamphetamine and is currently being studied for its therapeutic benefits in treating PTSD and anxiety disorders.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

-2

The charge on an oxygen ion is -2. An oxygen atoms contain six electrons in its valence electron shell.

Explanation:

1.5 mole or 1.5 total number of atoms are there in a 30. gram sample of neon .

The mole concept is a convenient method of expressing the amount of a substance.

Mole is the amount of substance that contains as many elementary entities as there are atoms in exactly 12 grams of the carbon−12 isotope.

1 mole=6.022×1023 particles of matter of any chemical substance.

To calculate the total number of atoms in 30 gm sample of neon-

Given,

Mass of the substance =30 gm

Molar mass of neon = 20.17 a.m.u

n(no. of atoms )=?

We know number of atoms is given -

n=mass/molar mass

n=30/20.17

n=1.48≈1.5 mole

The total number of atoms in a 30 gm sample of neon will be 1.5 mole .

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Answer:

(a) Oil

Explanation:

Oil is a renewable source, along with natural gas, coal, and nuclear energy.

lmk is this helped you

~rere

Answer:

A. Oil

Explanation:

Oil, along with natural gas, and coal are called fossil fuels and fossil fuels were formed within the Earth from dead plants and animals millions of years ago.

Answer:

See below

Explanation:

(NH4)2SO4   Molar weight (from periodic table)

       (N =14    H4 = 4   ) * 2 = 36

           S = 32   O4 = 64                  TOTAL = 132 gm/mole

N % =  ( 2*14) / 132 = 21.2%       molar mass = 28 gm

H % = (2 *4) / 132 =  6%            molar mass = 8  gm

S % =  32/132 = 24.2 %             molar mass = 32 gm

O % = (64) / 132 = 48.5%           molar mass = 64  gm

25.8 g of NH₄NO₃ decomposed to produce 32.3 L of water vapor.  71.4 g of NH₄NO₃ are needed to produce 10.0 L of O₂.

a) To determine the number of liters of water vapor produced, we first need to calculate the moles of NH₄NO₃ that decompose:

The molar mass of NH₄NO₃ is:

M(NH₄NO₃) = 14.01 g/mol (N) + 4(1.01 g/mol) (H) + 3(16.00 g/mol) (O) = 80.05 g/mol

The moles of NH₄NO₃ can be calculated as:

moles NH₄NO₃  = mass/molar mass = 25.8 g / 80.05 g/mol = 0.322 moles  NH₄NO₃

From the balanced equation, we see that 4 moles of H₂O are produced for every 2 moles of  NH₄NO₃  that decompose, so we can calculate the moles of H₂O produced as:

moles H₂O = 4/2 x moles NH₄NO₃ = 4/2 x 0.322 = 0.644 moles H₂O

Finally, we can use the ideal gas law to calculate the volume of water vapor produced at 350 degrees C and 0.950 atm:

PV = nRT

V = nRT/P

V = (0.644 mol) (0.0821 L·atm/mol·K) (623 K) / (0.950 atm) = 32.3 L

Therefore, 25.8 g of NH₄NO₃ decomposed to produce 32.3 L of water vapor.

b) To determine the grams of NH₄NO₃ needed to produce 10.0 L of O2, we can use the same approach, starting with the ideal gas law:

The molar volume of a gas at standard temperature and pressure (STP) is 22.4 L/mol.

The moles of O2 needed to produce 10.0 L can be calculated as:

moles O2 = V/STP = 10.0 L / 22.4 L/mol = 0.446 moles O2

From the balanced equation, we see that 2 moles of  NH₄NO₃ decompose to produce 1 mole of O2, so we can calculate the moles of NH₄NO₃ needed as:

moles NH₄NO₃= 2/1 x moles O2 = 2/1 x 0.446 = 0.892 moles NH4NO3

Finally, we can use the molar mass of NH4NO3 to calculate the grams needed:

mass NH₄NO₃ = moles NH₄NO₃ x molar mass = 0.892 mol x 80.05 g/mol = 71.4 g

Therefore, 71.4 g of NH₄NO₃ are needed to produce 10.0 L of O₂.

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Answer: 1. There are \(0.20\times 10^{23}\) molecules of sulfuric acid  in the solution.

2.  0.093 moles of baking soda have been used.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number \(6.023\times 10^{23}\) of particles.

To calculate the moles, we use the equation:

1. \(\text{Number of moles of sulpfuric acid}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{3.2g}{98g/mol}=0.033moles\)

1 mole of \(H_2SO_4\) contains = \(6.023\times 10^{23}\) molecules of sulfuric acid

Thus mole of \(H_2SO_4\) contains = \(\frac{6.023\times 10^{23}}{1}\times 0.033=0.20\times 10^{23}\) molecules of sulfuric acid

There are \(0.20\times 10^{23}\) molecules of sulfuric acid  in the solution.

2.  \(\text{Number of moles of baking soda}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{7.8g}{84g/mol}=0.093moles\)

0.093 moles of baking soda have been used.

Answer:

Lithium Iodide , Sodium Fluoride, Sodium Chloride, Sodium Bromide , Sodium Iodide, Potassium Fluoride  and Potassium Chloride are the examples of ionic compounds.

Explanation:

Ionic compounds have bonds that require the most energy to break because of strong attractive force between them. According to scientists, about 700 to 4000 Kilo Joules energy is required to break bonds between ionic compounds whereas 800 to 1000 kilo joules energy is needed by the compounds having covalent triple bonds. So ionic compounds needs the most energy to break.

Answer:

It is not possible to determine whether the crystallization of sodium acetate is endothermic or exothermic simply by feeling the sides of the flask. To determine the heat of crystallization, you would need to measure the temperature of the solution before and after crystallization and compare the two values.

The heat of crystallization is defined as the heat absorbed or released during the process of crystal formation from a solution or a melt. If heat is absorbed during the process, the reaction is endothermic and the temperature of the solution or melt will decrease. If heat is released, the reaction is exothermic and the temperature will increase.

In the case of sodium acetate, it is an exothermic reaction, meaning that heat is released during crystallization and the temperature of the solution will increase. This is because the process of forming the crystal lattice requires the breaking of hydrogen bonds and other intermolecular forces, which releases energy.

Explanation:

Answer:

exothermic

Explanation:

When you crystallize the solution, sodium acetate forms a new bond from the soluble aqueous state ( Na+ and C2H3O2- ) to the solid state (NaC2H3O2). Forming bonds in chemistry is generally an exothermic reaction.

In this reaction, the H₂O will be formed as a product. The reaction involves the combination of 2 molecules of NO and 2 molecules of H₂ to form 1 molecule of N₂O and 1 molecule of H₂O. The heat serves as a catalyst to drive the reaction forward.

In the reaction 2NO + H₂ = N₂O + H₂O (with heat), H₂O (water) is a product formed as a result of the reaction between nitrogen monoxide (NO) and hydrogen gas (H₂). When heat is applied, the reactants combine to produce dinitrogen monoxide (N₂O) and water (H₂O). The H₂O will exist as a product in the equilibrium mixture.

So, the H₂O will be produced as a result of the reaction and will remain in the mixture.

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Answer:

Sucrose to is the substrate of the reaction because is a simple sugar( disaccharide) which produce glucose and fructose in the presence of sucrase or when it is hydrolysed.

The question is incomplete, the complete question is;

Rico is doing an experiment. He makes a solution of calcium carbonate in a beaker of 200 mL of water at room temperature (25 °C). He adds a small amount of lemon juice to the solution and a chemical reaction begins. Rico reduces the temperature of the solution by 10 °C by adding ice. As the solution cools, what will happen to the chemical reaction?  

A. The chemical reaction will stop suddenly.

B. There will be no change in the rate of the chemical reaction.

C. The chemical reaction will slow as the water cools.

D. The speed of the chemical reaction will increase as the water cools.

Answer:

C. The chemical reaction will slow as the water cools.

Explanation:

The rate of a chemical reaction is dependent on the temperature of the reaction system. This derives directly from the collision theory of chemical reaction.

The higher the temperature of the system, the more frequently the particles collide and the faster the rate of reaction.

As the temperature is decreased, the rate of reaction decreases simultaneously. Therefore, as Rico decreases the temperature from 25 degrees to 10 degrees, the rate of reaction decreases accordingly.

Sea Arches are formed when a cave continues to be eroded and expanded until it cuts through a headland.

A sea cave forms when a sea arch pursues to be eroded and widened until the rock becomes too weak to carry the roof of the sea cave and collapses into the sea. Caves are devised by the dissolution of limestone. Rainwater collects carbon dioxide from the air and as it percolates through the soil, which rotates into a weak acid.

Sea caves occur on almost every precipice headland or coast where the waves break straight on a rock cliff and are formed Sea caves by mechanical erosion rather than the chemical solution procedure that is responsible for the majority of inland caves.

So we can conclude that Sea caves or littoral caves are formed fundamentally from erosion caused by waves

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The change in heat content of the system is approximately 516,883.58 J (or 516.88 kJ).

To calculate the change in heat content of the system, we need to consider the heat gained or lost during each phase change.

First, we need to calculate the heat gained or lost during the cooling of steam to water at 100°C (the boiling point of water at atmospheric pressure).

1.Heat lost during cooling from 121°C to 100°C:

The specific heat capacity of steam is approximately 2.03 J/g°C.

The mass of the sample is 218 g.

The temperature change is 121°C - 100°C = 21°C.

The heat lost during this phase is given by:

Q1 = (mass) × (specific heat capacity) × (temperature change)

Q1 = 218 g × 2.03 J/g°C × 21°C = 9186.06 J

Next, we need to calculate the heat lost during the phase change from steam at 100°C to water at 0°C.

2. Heat lost during phase change from steam to water:

The heat of vaporization for water at its boiling point is approximately 40.7 kJ/mol. Since we have the mass of the sample, we can convert it to moles of water.

The molar mass of water (H2O) is approximately 18 g/mol.

Moles of water = (mass of sample) / (molar mass of water)

Moles of water = 218 g / 18 g/mol ≈ 12.11 mol

The heat lost during this phase change is given by:

Q2 = (moles of water) × (heat of vaporization)

Q2 = 12.11 mol × 40.7 kJ/mol × 1000 J/kJ = 494,467 J

Finally, we need to calculate the heat lost during the cooling of water from 0°C to -14°C.

3. Heat lost during cooling from 0°C to -14°C:

The specific heat capacity of water is approximately 4.18 J/g°C.

The mass of the sample is 218 g.

The temperature change is 0°C - (-14°C) = 14°C.

The heat lost during this phase is given by:

Q3 = (mass) × (specific heat capacity) × (temperature change)

Q3 = 218 g × 4.18 J/g°C × 14°C = 12,230.52 J

To find the total change in heat content, we sum up the heat changes from each phase:

Total change in heat content = Q1 + Q2 + Q3

Total change in heat content = 9186.06 J + 494467 J + 12230.52 J

Total change in heat content ≈ 516,883.58 J

Therefore, the change in heat content of the system is approximately 516,883.58 J (or 516.88 kJ).

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Absolute zero is an idea in thermodynamics that describes the lowest energy system.

Thermodynamics

Thermodynamics is the study of thermal energy and heat. One of the most important ideas in thermodynamics is entropy. Entropy is defined as the chaos within a system. Chaos is the movement or different orientations of molecules in a system. Entropy is related to temperature; the higher the temperature, the higher the entropy. High entropy means there is a large amount of chaos in a system, while low entropy is low chaos.

Absolute zero

Absolute zero occurs when the temperature of a system is 0 kelvin or -273.15 °C. Zero kelvin is the theoretical temperature in which entropy equals 0. This means that there is no movement or energy within a system. Absolute zero is the lowest energy a system can possibly have.

Answer: The volume of product formed is 0.26 L

Explanation:

\(\text{Moles of solute}=\frac{\text{given mass}}\times{\text{Molar Mass}}\)    

\(\text{Moles of} H_2=\frac{0.02g}{2g/mol}=0.01moles\)

\(2H_2(l)+O_2(l)\rightarrow 2H_2O(g)\)

As \(O_2\) is the the excess reagent, \(H_2\) is the limiting reagent as it limits the formation of product.

According to stoichiometry :

2 moles of \(H_2\) give = 2 moles of \(H_2O\)

Thus 0.01 moles of \(H_2\) will give =\(\frac{2}{2}\times 0.01=0.01moles\)  of \(H_2O\)

According to ideal gas equation:

\(PV=nRT\)

P = pressure of gas = 101.325 kPa = 1 atm

V = Volume of gas = ?

n = number of moles = 0.01

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(40^0C=(40+273)K=313K\)

\(V=\frac{nRT}{P}\)

\(V=\frac{0.01mol\times 0.0821L atm/K mol\times 313K}{1atm}=0.26L\)

Thus the volume of product formed is 0.26 L

Answer:

1. Amine.

2. Alcohol.

3. Carboxylic Acid.

4. Halocarbon.

Explanation:

The correct answer according to the tile are Amine, Alcohol, Carboxylic acid, Halocarbon.

How can hydrocarbons be classified based on their structure?

Hydrocarbons can be classified as either aromatic or aliphatic compounds, depending on the presence of a benzene ring.

What is the most common classification of hydrocarbons?

Alkanes are hydrocarbons in which all of the bonds are single bonds. Alkenes are hydrocarbons that contain a carbon-carbon double bond.

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Answer:Individual contour lines on a topographical map are a fixed interval of elevation apart known as a contour interval. Common contour intervals are 5, 10, 20, 40, 80, or 100 feet. The actual contour interval of a map depends upon the topography being represented as well as the scale of the map.

Answer:

C.0.28 V  

Explanation:

Using the standard cell potential we can find the standard cell potential for a voltaic cell as follows:

The most positive potential is the potential that will be more easily reduced. The other reaction will be the oxidized one. That means for the reactions:

Cu²⁺ + 2e⁻ → Cu E° = 0.52V

Ag⁺ + 1e⁻ → Ag E° = 0.80V

As the Cu will be oxidized:

Cu → Cu²⁺ + 2e⁻

The cell potential is:

E°Cell = E°cathode(reduced) - E°cathode(oxidized)

E°cell = 0.80V - (0.52V)

E°cell = 1.32V

Right answer is:

The change in enthalpy and the change in internal energy of a system always will be equal when there is no work being done by or on the system, or when the pressure is constant.

Enthalpy (H) is defined as the sum of the internal energy (U) of a system and the product of pressure and volume (PV). When there is no work being done on or by the system, the change in volume is zero and therefore the change in enthalpy is equal to the change in internal energy.

This is known as the first law of thermodynamics. However, if work is being done on or by the system, the change in enthalpy and the change in internal energy may not be equal due to the presence of work energy. Therefore, in order for the change in enthalpy and the change in internal energy to be equal, the system must either not have any work being done or the pressure must be constant.

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Avogadro's constant says that 1 mole of any atom \(6.022*10^2^3\) contains atoms. In this case, you have \(1.99 * 10^2^4\) atoms:

\(1.99*10^2^4/6.022*10^2^3=3.3\)

1 mole of p4010 = 283.889

So \(1.99* 10^2^4\) molecules mass is

\(283.889*3.3=936.833 gram\)

Therefore, the mass in grams, of 1.99 x 1024 molecules of P4010 is 936.833 grams.

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Answer: friction between a car's windshield and the air as you drive into the wind.

Explanation: Hope this helps :)

Answer:

R = 8.314 pKa*L/mol*K

The value for the ideal gas constant (R) is approximately 8.314 kPa·L/(mol·K).

To determine the value for the ideal gas constant (R) when pressure (P) is in kilopascals (kPa), temperature (T) is in kelvins (K), volume (V) is in liters (L), and amount of gas (n) is in moles, we need to use the appropriate units for R based on these measurements.

The ideal gas constant, R, can be expressed in various units. The most common units for R are:

R = 0.0821 L·atm/(mol·K) (atmospheres, liters, moles, and kelvins)

However, since you provided the measurements in kilopascals, liters, moles, and kelvins, we need to use a different value for R that is consistent with these units:

R = 8.314 kPa·L/(mol·K)

Therefore, when pressure is in kilopascals, volume is in liters, amount of gas is in moles, and temperature is in kelvins, the value for the ideal gas constant (R) is approximately 8.314 kPa·L/(mol·K).

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Answer:

The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

Explanation:

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The total mass of the products is 853.8 g.

We know that we have to apply the principles of stoichiometry so as to be able to obtain the mass of the mass of the products and then the total mass of the products that is obtained in the reaction.

We have that in the question; 496. 5 grams of lead II nitrate reacts with potassium bromide is such a way that the lead II nitrate would be completely consumed in the reaction. This means that the lead II nitrate is the limiting reactant in the reaction.

Number of moles of the lead II nitrate = 496. 5 grams /331 g/mol

= 1.5 moles

If 1 mole of  lead II nitrate produces 1 mole of lead II bromide

Mass of lead II bromide produced = 1.5 moles * 367 g/mol

= 550.5 g

If 1 mole of lead II nitrate produces 2 moles of potassium nitrate

1.5 moles of lead II nitrate produces  1.5 * 2 /1

= 3 moles of  potassium nitrate

Mass of  potassium nitrate = 3  moles * 101.1

= 303.3 g

Total mass produced = 550.5 g + 303.3 g

= 853.8 g

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