What two particles are found in the nucleus of an atom?

Answer:

D. The heat speeds up a physical change, causing the liquid to turn into a gas.

Explanation:

Nonrenewable natural resources are resources that cannot be replenished within a lifetime.

The specific heat capacity of this chunk of metal is equal to 0.32 J/g°C.

Given the following data:

To determine the specific heat capacity of this chunk of metal:

Mathematically, quantity of heat is given by the formula;

\(Q = mc\theta\)

Where:

Making c the subject of formula, we have:

\(c = \frac{Q}{m\theta}\)

Substituting the given parameters into the formula, we have;

\(c = \frac{400}{250 \times (25-20)}\\\\c = \frac{400}{250 \times 5}\\\\c = \frac{400}{1250 }\)

Specific heat, c = 0.32 J/g°C.

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The E° for a galvanic cell is 0.000217 volts if  ∆G° = -6.3 kJ/mol and n = 3. (F = 96,500 J/(V･mol).

A galvanic cell or voltaic cell, named after the scientists Luigi Galvani and Alessandro Volta, respectively, is an electrochemical cell in which an electric current is generated from spontaneous Oxidation-Reduction reactions. A common apparatus generally consists of two different metals, each immersed in separate beakers containing their respective metal ions in solution that are connected by a salt bridge or separated by a porous membrane.

E°=ΔG°/-nF= -6.3/-3×96500=0.000217 V.

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Answer:

Explanation:

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) is:

HCl(aq) + NaOH(s) → NaCl(aq) + H2O(l)

From the balanced equation, we can see that one mole of hydrochloric acid reacts with one mole of sodium hydroxide to produce one mole of sodium chloride and one mole of water.

First, we need to determine which reactant is limiting, i.e., which reactant is completely consumed in the reaction. To do this, we need to compare the number of moles of each reactant, using their respective molar masses:

Molar mass of HCl = 1.008 g/mol (atomic weight of hydrogen) + 35.45 g/mol (atomic weight of chlorine) = 36.46 g/mol

Molar mass of NaOH = 22.99 g/mol (atomic weight of sodium) + 16.00 g/mol (atomic weight of oxygen) + 1.008 g/mol (atomic weight of hydrogen) = 39.99 g/mol

Number of moles of HCl = mass / molar mass = 30.0 g / 36.46 g/mol ≈ 0.823 mol

Number of moles of NaOH = mass / molar mass = 14.3 g / 39.99 g/mol ≈ 0.358 mol

Since the stoichiometric ratio between HCl and NaOH is 1:1, NaOH is the limiting reactant because it has fewer moles than HCl.

Therefore, we can calculate the maximum mass of NaCl that can be produced by the reaction using the number of moles of NaOH:

Number of moles of NaCl produced = number of moles of NaOH used in the reaction = 0.358 mol

Mass of NaCl produced = number of moles of NaCl produced x molar mass of NaCl

Molar mass of NaCl = 22.99 g/mol (atomic weight of sodium) + 35.45 g/mol (atomic weight of chlorine) = 58.44 g/mol

Mass of NaCl produced = 0.358 mol x 58.44 g/mol = 20.9 g

Therefore, the maximum mass of NaCl that can be produced by the reaction is approximately 20.9 g

Answer: The value for rate constant for a reaction is \(4.81\times 10^{-4} s^{-1}\)

Explanation:

The integrated rate law equation for first-order kinetics:

\(k=\frac{2.303}{t}\log \frac{a}{a-x}\) ......(1)

Let the initial concentration of reactant be 100 g

Given values:

a = initial concentration of reactant = 100 g

a - x = concentration of reactant left after time 't' = 25 % of a = 25 g

t = time period = 48 min = 2880 s       (Conversion factor: 1 min = 60 s)

Putting values in equation 1:

\(k=\frac{2.303}{2880s}\log (\frac{100}{25})\\\\k=4.81\times 10^{-4} s^{-1}\)

Hence, the value for rate constant for a reaction is \(4.81\times 10^{-4} s^{-1}\)

Answer:

20.44 grams of sodium nitrate can be formed

Explanation:

The balanced chemical equation for the reaction between lead (II) nitrate and sodium iodide is:

Pb(NO3)2 + 2NaI → 2NaNO3 + PbI2

C. flow under dense and become more thick.

A substance that is tightly packed or has a high density.

The term "density" refers to the relationship between a substance's mass and the volume it takes up in space (volume). The mass, size, and arrangement of an object's atoms influence its density. The ratio of a substance's mass to its volume is said to be its density, or D.

Because it enables us to predict which compounds will float and which will sink in a liquid, density is a crucial notion. An object will frequently float as long as its density is less than that of the liquid.

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According to the given statement Na of the atoms listed below has the largest radius.

An atom is made up of a core nucleus and one or even more electrons with negative charges that orbit it. The positively charged, comparatively hefty protons and neutrons that make it up the nucleus may be present. The fundamental building components of matter are atoms.

Atoms are made up of a nucleus in the center that is surrounded by protons, neutrons, and electron. Uranium is divided into smaller atoms during the fission process, creating new atoms. The creation or atoms in enormous numbers can be seen in the Big Bang and Supernova phenomena.

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Answer:

In 1924, the French physicist, Louis de Broglie suggested that if light has electron, behaves both as a material particle and as a wave. According to this theory, small particles like electrons when in motion possess wave properties.

Explanation:

examples

This can be derived as follows according to Planck’s equation, E = hv = hc /λ ∴ v=c/λ(energy of the photon (on the basis of Einstein’s mass energy relationship) E = mc2    

( If Bohr’s theory is associated with de-Broglie’s equation then wave length of an electron can be determined in bohr’s orbit and relate it with circumference and multiply with a whole number 2πr = nλ or λ = (2πr/2π) From de-Broglie equation, λ = (h/mv).  

27 grams of water are produced from the given amounts of hydrogen and oxygen.

To determine the amount of water produced from the reaction between hydrogen and oxygen, we need to compare the amounts of reactants (hydrogen and oxygen) to the stoichiometry of the balanced chemical equation.

The balanced equation is:

2H₂ + O₂ → 2H₂O

The molar mass of hydrogen (H₂) is 2 g/mol, and the molar mass of oxygen (O₂) is 32 g/mol.

Given:

Mass of hydrogen = 3 grams

Mass of oxygen = 24 grams

We can calculate the number of moles of each reactant by dividing their respective masses by their molar masses:

Number of moles of hydrogen = 3 grams / 2 g/mol = 1.5 moles

Number of moles of oxygen = 24 grams / 32 g/mol = 0.75 moles

According to the balanced equation, the ratio of hydrogen to water is 2:2, and the ratio of oxygen to water is 1:2. Therefore, the limiting reactant in this reaction is oxygen, as it is consumed in a smaller quantity compared to the stoichiometry of the reaction.

From the reaction, we can see that 1 mole of oxygen produces 2 moles of water. Thus, the number of moles of water produced is twice the number of moles of oxygen:

Number of moles of water = 2 * 0.75 moles = 1.5 moles

To determine the amount of water produced in grams, we multiply the number of moles by the molar mass of water (H₂O), which is approximately 18 g/mol:

Mass of water produced = 1.5 moles * 18 g/mol = 27 grams

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Based on the heat of reaction, if 123 kJ of heat is evolved when the reaction described below is carried out, the mass of HCl gas (36.46 g/mol) produced is 23.6 g.

The heat of a reaction is the amount of heat energy given off or absorbed in the reaction.

During a reaction, energy changes occur as a result of the breaking of bonds in the reactants as well as the formation of bonds in the products.

The sum of the overall energy change that accompanies the formation of products from the reactants gives the heat change of a reaction.

Considering the heat change of the given reaction below:

3 Cl₂ (g) + PH₃ (g) → PCl₃ (g) + 3 HCl (g)     ∆H = - 570.4 kJ

The formation of 3 moles of HCl results in the evolution of 570.4 kJ of heat.

If 123 kJ of heat are evolved, then the moles of HCl produced will be:

Moles of HCl produced = 123 kJ * 3 moles / 570.4 kJ

Moles of HCl produced =  0.647 moles

Mass of HCl produced = 0.647 * 36.46

Mass of HCl produced = 23.6 g

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Answer:

1. Using the ideal gas law, PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin, we can solve for V:

V = (nRT) / P

Plugging in the given values, we get:

V = (0.210 mol)(0.08206 L·atm/mol·K)(295.5 K) / 1.00 atm

V = 4.91 L

Therefore, the sample of gas occupies 4.91 L.

2. We can use the combined gas law to find the new volume of the sample at the new temperature and pressure:

(P1V1) / (n1T1) = (P2V2) / (n2T2)

At conditions 1, we know P1 = 1.00 atm, V1 = 4.91 L, n1 = 0.210 mol, and T1 = 295.5 K.

At conditions 2, we know P2 = 1.00 atm (pressure is constant), n2 = n1 (number of moles is constant), and T2 = 95.0 + 273.15 = 368.15 K.

Solving for V2, we get:

V2 = (P1V1n2T2) / (n1T1P2)

V2 = (1.00 atm)(4.91 L)(0.210 mol)(368.15 K) / (0.210 mol)(295.5 K)(1.00 atm)

V2 = 7.23 L

Therefore, the new volume of the sample at the higher temperature is 7.23 L.

3. At STP (standard temperature and pressure), which is 0 °C (273.15 K) and 1 atm, the molar volume of an ideal gas is 22.4 L/mol. Therefore, the number of moles of gas can be calculated as:

n = V / Vm

where Vm is the molar volume of gas at STP, which is 22.4 L/mol.

n = 2.82 L / 22.4 L/mol

n = 0.126 mol

The molar mass of the gas can be calculated as:

molar mass = mass / n

mass = 2.54 g

molar mass = 2.54 g / 0.126 mol

molar mass = 20.16 g/mol

Therefore, the molar mass of the gas is 20.16 g/mol.

4. Let's assume that the total number of moles in the mixture is 1 (since we don't know the actual amount). The first gas constitutes 65% of the mixture, so its mole fraction is 0.65. Therefore, the mole fraction of the second gas is 0.35 (since the sum of the mole fractions must equal 1). The partial pressures of the two gases can be calculated using the mole fractions and the total pressure:

Pgas1 = mole fraction of gas 1 x total pressure

Pgas1 = 0.65 x 4.3 atm

Pgas1 = 2.79 atm

Pgas2 = mole fraction of gas 2 x total pressure

Pgas2 = 0.35 x 4.3 atm

Pgas2 = 1.51 atm

Therefore, the partial pressure of the first gas is 2.79 atm and the partial pressure of the second gas is 1.51 atm.

5. The mole fraction of a gas is the ratio of the number of moles of that gas to the total number of moles in the mixture. We can find the total number of moles by adding up the partial pressures of the gases and dividing by the total pressure:

total moles = (partial pressure of gas A + partial pressure of gas B + partial pressure of gas C) / total pressure

total moles = (0.75 atm + 0.50 atm + 0.25 atm) / 1.50 atm

total moles = 1.50 moles

To find the mole fraction of helium, we need to know the number of moles of helium. We can use the partial pressure of helium and the total pressure to calculate the number of moles of helium using the ideal gas law:

n = PV / RT

n = (0.50 atm)(1.00 L) / (0.08206 L·atm/mol·K)(298 K)

n = 0.0202 mol

Now we can calculate the mole fraction of helium:

mole fraction of helium = moles of helium / total moles

mole fraction of helium = 0.0202 mol / 1.50 moles

mole fraction of helium = 0.0135

Therefore, the mole fraction of helium in the gas mixture is 0.0135.

Answer:

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Explanation:

On a scale of 1️⃣ to , you’re a 9️⃣. I’m the 1️⃣ you need.

The arrow in a chemical equation represents the direction of the reaction. It indicates the conversion of reactants into products. The arrow points from the reactant side to the product side, symbolizing the flow of the reaction.

The purpose of the arrow is to visually represent the chemical transformation occurring in the reaction. It shows the relationship between the reactants and products and the direction in which the reaction proceeds. The arrow implies that the reactant molecules are being rearranged and transformed into new substances with different properties.

Chemical equations are used to describe the stoichiometry and balance of reactions. The arrow helps convey this information by illustrating the overall process taking place. It serves as a crucial element in understanding the reaction's composition, reaction conditions, and the substances involved.

Furthermore, the arrow also implies that the reaction can occur in both directions. In reversible reactions, the arrow can be represented as a double-headed arrow, indicating that the reaction can proceed in either direction depending on the conditions.

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Answer:

the answer is a

Explanation:

There are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

To determine the number of water molecules in the given volume of water, we need to use the relationship between mass, volume, and molar mass of water.

First, we need to find the mass of water in the bottle:

Mass = Density * Volume

Mass = 0.967 g/mL * 499.8 mL = 483.9 g

Next, we need to convert the mass of water to moles using the molar mass of water. The molar mass of water (H2O) is approximately 18.015 g/mol.

Moles = Mass / Molar mass

Moles = 483.9 g / 18.015 g/mol = 26.88 mol

Finally, we can calculate the number of water molecules using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules = Moles * Avogadro's number

Number of molecules = 26.88 mol * (6.022 x 10^23 molecules/mol) = 1.62 x 10^25 molecules

Therefore, there are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

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Answer:

The sun provides most of the energy on earth because it is the earth's (and the solar system's) greatest source of heat and light.

Explanation:

The process of photosynthesis in plants uses the energy from the sun and converts that energy to be used for plants.
The burning of fossil fuels produces greenhouse gases which trap the heat in our earth's atmosphere (causing global warming).

Answer:

C.

Explanation:

Since the mass number is the number of protons and neutrons added together, the answer is 35. Since the questions are respectively electron quantity and mass number, the only answer choice with 35 as the second choice is C, so that is the correct answer.

The relationship between temperature and gas motion is a direct relationship.

The kinetic energy of gas particles is proportional to the square of their velocity, so as the temperature of a gas increases, the velocity of its particles also increases. This means that the motion of the gases becomes more energetic, causing the particles to collide more frequently and with greater force. These collisions result in an increase in pressure and volume, which are two other characteristics that are related to the temperature and motion of gases.

In summary, the relationship between temperature and the motion of gases can be explained by the kinetic theory of gases, which states that the temperature of a gas is directly proportional to the average kinetic energy of its particles. As the temperature of a gas increases, its particles move faster, resulting in more energetic collisions and changes in pressure and volume.

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One of the lab safety rules being violated is that Jodi doesn't have her hair tied up. She should have her hair tied up. Having her long hair not tied up or away from her face is a safety hazard. Jodi is also not wearing glasses, which is essential when working with chemicals. One of the Bunsen Burners aren't being used but it's on, which is a fire hazard.

Answer:

Jodi should wear her hair up to avoid a mishap, such as lighting her hair on fire. Then, instead of using a fire extinguisher on Jodi, Kimberly should use a fire blanket to prevent additional damage. Mac is preoccupied with a second flame and maybe Jodi without her safety goggles?

Answer:

I don't understand snap the equation and send it

Answer:

moles of Ba²⁺ : 0.97 mol

Moles of OH⁻ : 1.94 mol

Explanation:

Given data:

Mass of Ba(OH)₂ = 165.5 g

Moles of barium ions = ?

Moles of hydroxide ion = ?

Solution:

Number of moles of barium hydroxide:

Number of moles = mass/molar mass

Number of moles = 165.5 g/ 171.34 g/mol

Number of moles = 0.97 mol

one mole of barium hydroxide contain one mole of Ba²⁺ and 2 mole of OH⁻ ion.

Thus in 0.97 moles of barium hydroxide,

moles of Ba²⁺ :

0.97 mol × 1 = 0.97 mol

Moles of OH⁻ :

0.97 mol × 2=  1.94 mol

1)The new volume at a pressure of 1 atm is 0.25 L.

2)The new temperature of the container at a volume of 2 L is approximately 398°C.

3)The new pressure at 2.5 L is approximately 4.8 atm.

4)The new volume at a temperature of 60°C is approximately 55.8

1)To solve these gas law problems, we can use the ideal gas law equation, which states:

PV = nRT,

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

Balloon volume at a pressure of 0.5 atm:\(V_1\) = 0.5 L, \(P_1\)= 0.5 atm.

New volume at a pressure of 1 atm:\(P_2\) = 1 atm.

We can use the relationship\(P_1V_1 = P_2V_2\) to find the new volume (\(V_2\)).

(0.5 atm)(0.5 L) = (1 atm)(\(V_2\))

\(V_2\) = 0.25 L.

Therefore, the new volume at a pressure of 1 atm is 0.25 L.

2)Container volume: \(V_1\) = 2 L, \(T_1\)= 125°C.

New temperature at the same volume: \(V_2\) = 2 L.

We can use the relationship\(V_1\)/\(T_1\) = \(V_2\)/\(T_2\) to find the new temperature (\(T_2\)).

(2 L)/(125 + 273) K = (2 L)/(\(T_2\) + 273) K

Solving for\(T_2\), we get \(T_2\) ≈ 398°C.

Therefore, the new temperature of the container at a volume of 2 L is approximately 398°C.

3)Initial volume: \(V_1\)= 4.0 L, \(P_1\) = 3.0 atm.

Final volume: \(V_2\) = 2.5 L.

Since the temperature (T) is constant, we can use the relationship \(P_1\)\(V_1\) = \(P_2V_2\) to find the new pressure (\(P_2\)).

(3.0 atm)(4.0 L) = (\(P_2\))(2.5 L)

\(P_2\) ≈ 4.8 atm.

Therefore, the new pressure at 2.5 L is approximately 4.8 atm.

4)Initial volume: \(V_1\)= 50 mL, \(T_1\) = 25°C.

New temperature: \(T_2\) = 60°C.

We need to convert the temperatures to Kelvin.

\(T_1\)= 25 + 273 = 298 K, \(T_2\) = 60 + 273 = 333 K.

We can use the relationship \(V_1/T_1 = V_2/T_2\) to find the new volume (\(V_2\)).

(50 mL)/(298 K) = (\(V_2\))/(333 K)

\(V_2\) ≈ 55.8 mL.

Therefore, the new volume at a temperature of 60°C is approximately 55.8

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D. Helium atoms are created when hydrogen atoms unite.

Nuclear fusion is the process in which two or more atom nuclei join together, or "fuse," to form a single heavier nucleus. This process is what powers the sun and other stars, and it is the same process that is being researched for potential use as an energy source on Earth. In the sun, the process of nuclear fusion involves the combining of hydrogen atoms to make helium atoms.When two or more atomic nuclei join, one or more new atomic nuclei and subatomic particles are created. This reaction is known as nuclear fusion. Energy is released or absorbed depending on how much mass the reactants and products have in common.

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complete question:Which of the following describes the process of nuclear fusion, as it occurs inside our sun?

A Hydrogen and oxygen atoms combine to make water molecules.

B Helium atoms split apart to form hydrogen atoms.

C Water molecules break apart into hydrogen and oxygen atoms.

D Hydrogen atoms combine to make helium atoms.

Option B:

A mixture of ethanol and water (CH3CH2OH and H₂O) will form a homogenous solution.

Homogeneous solutions are solutions with uniform composition and properties throughout the solution.

Thus, from the given options, a mixture of ethanol and water (CH3CH2OH and H₂O) will form a homogenous solution.

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Answer:

Unfavorable reactions: Reaction A and Reaction B.

Coupled reactions favorable: Reactions B and C and Reactions A and C.

Net change:

Reactions B and C : -14.2kJ/mol

Reactions A and B : 30.1kJ/mol

Reactions A and C: -16.7kJ/mol

Explanation:

A reaction is thermodynamically favorable (spontaneous) if ΔG < 0. Thus, the unfavorable reactions -ΔG > 0- are:

Reaction A and reaction B.

When reaction C is coupled with reaction B and reaction A the chemical equation is:

ATP + fructose-1,6-phosphate ⟶ ADP + fructose-1,6-bisphosphate

ΔG = 16.3 - 30.5 = -14.2 kJ/mol

ATP + glucose ⟶ ADP + glucose-6-phosphate

ΔG = 13.8 - 30.5 = -16.7 kJ/mol

The coupled reaction of A and B has a change in free energy of:

ΔG = 13.8 + 16.3 = 30.1 kJ/mol

Answer:

They are made up of electrons, neutrons and protons

Explanation: