What do the conclusions tell about the experiment?
OA. The conclusions tell what other scientists think about the
experiment.
B. The conclusions tell how the experiment should be repeated.
C. The conclusions tell if the scientific method was followed.
D. The conclusions tell why the data support or reject the hypothesis.

answers: therefore, binding energy equal to zero

Explanation:in this case of a hydrogen atom, it has only one proton and zero neutrons. in this case the proton is already seperated from other nucleons. so energy is not released in this case.

Answer: C. 1000 Newton

Explanation:

Given that :

Weight of moon rover on earth = 6000 newton

Approximate of moon rover on moon will be?

Weight of an object (W) = mass(m) × acceleration due to gravity(g)

To get the mass of moon rover(m) :

m = weight / acceleration due to gravity

g on earth = 9.8m/s²

Hence,

mass of moon rover = 6000/ 9.8

= 612.244kg

Surface gravity on the moon is about 1.6m/s²

Hence ;

Weight of moon rover on the moon :

Mass of moon rover × 1.6m/s²

= 612.244 × 1.6m/s²

= 979.59 Newton

= 1000 Newton (nearest thousand)

The approximate weight of the Moon Rover on the Moon is 1000 N

The correct answer to the question is Option C. 1000 N

We'll begin by calculating the mass of the Moon Rover. This can be obtained as follow:

Weight (W) = 6000 N

Acceleration due to gravity (g) = 9.8 m/s²

W = m × g

6000 = m × 9.8

m = 6000 / 9.8

Acceleration due to gravity of the moon (g) = 1.67 m/s²

Mass (m) = 612.24 Kg

W = m × g

W = 612.24 × 1.67

Therefore, the approximate weight of the Moon Rover on the Moon is 1000 N

The correct answer to the question is Option C. 1000 N

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To buy two chocolate bars, one pack of peanuts, and a can of soda with a snack machine that only accepts 5-centavo coins, we need to Solve the Equation to calculate the total cost and the number of coins required. The answer to this question is 21 coins.

One chocolate bar costs 25 cent, so two chocolate bars cost 25 x 2 = 50 cent.One pack of peanuts costs 75 cent.A can of soda costs 50 cent.The total cost of these snacks is 50 + 75 + 50 = 175 cent.Now, we need to find how many 5-centavo coins make up 175 cent.1 centavo is equal to 0.05 cents.Therefore, 175 cent is equal to 175/0.05 = 3,500 centavos.

To find the number of 5-centavo coins required, we need to divide 3,500 by 5.3,500 ÷ 5 = 700 coins.So, it will take 700 5-centavo coins to buy two chocolate bars, one pack of peanuts, and a can of soda.

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Answer:

The answer you're looking for is A

Explanation:

A is the answer

Explanation:

The probability of a hurricane forming in the northern hemisphere is about 36.4%.

To find the probability of a hurricane forming in the northern hemisphere, we need to use the formula for conditional probability. The formula is P(A|B) = P(A and B) / P(B), where A and B are two events.

In this case, the events are "hurricane forming" and "in the northern hemisphere". We can fill in the formula with the values from the two-way table:
P(hurricane | northern hemisphere) = P(hurricane and northern hemisphere) / P(northern hemisphere)

From the table, we see that there were 43 hurricanes that formed in the northern hemisphere. The total number of storms in the northern hemisphere is 75+43 = 118. Therefore:
P(hurricane | northern hemisphere) = 43/118

We can simplify this fraction by dividing the numerator and denominator by the greatest common factor of 43 and 118, which is 1. So:
P(hurricane | northern hemisphere) = 43/118 ≈ 0.3644

To express this as a percentage, we multiply by 100 and round to the nearest tenth:
P(hurricane | northern hemisphere) ≈ 36.4%

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The overall enthalpy change i.e ΔH for the system is -1300 kJ.

Enthalpy change in a reaction is defined as the difference in the potential energy of the products and the potential energy of the reactants.

This is represented by ΔHreaction.

The reaction of enthalpy change is given as

ΔHreaction= ΔHproducts -  ΔHreactants

where ΔHproducts is the potential energy of the products

=[(-200) + (-300)]kJ

= -500kJ

And,  ΔHreactants is the potential energy of the reactants

=800KJ

Therefore, by putting these values ΔHreaction can be calculated as

ΔHreaction

= [-500-800] KJ

=-1300 KJ

Thus, the overall enthalpy change is -1300KJ

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Answer:

Anaerobic exercise uses energy that’s readily available in your muscles, because the body isn’t relying on oxygen, these strong, powerful movements can only be sustained for 10 to 15 seconds.

Explanation:

Anaerobic exercise is beneficial for good health because it:

Strengthens bones

Burns fat

Builds muscle

Maintains muscle mass, which is important for people as they age

As we age, we tend to lose muscle at a rate of about 1 percent per year after age 27, unless we actively work to slow that decline, Muscle is a metabolically active tissue and the more of it we can maintain, the more calories we can burn while at rest.
Anaerobic respiration occurs more quickly than aerobic respiration.
A major advantage of aerobic respiration is the amount of energy it releases. Without oxygen, organisms can split glucose into just two molecules of pyruvate. This releases only enough energy to make two ATP molecules.
Methanogenesis, a form of carbon-dioxide respiration, that is used to produce methane gas by anaerobic digestion. Biogenic methane is used as a sustainable alternative to fossil fuels.
Anaerobic respiration is a critical component of the global nitrogen, iron, sulfur, and carbon cycles through the reduction of the oxyanions of nitrogen, sulfur, and carbon to more-reduced compounds.
Specific types of anaerobic respiration are also critical in bioremediation, which uses microorganisms to convert toxic chemicals into less-harmful molecules to clean up contaminated beaches, aquifers, lakes, and oceans. For example, toxic arsenate or selenate can be reduced to less toxic compounds by various anaerobic bacteria via anaerobic respiration.
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Answer:

sodium chloride+difluorine=sodium fluoride+dichlorine

Explanation:

these are the elements name

The pairs of molecules that could be joined together by a peptide bond in a dehydration reaction are 3 and 12, and 13 and 7. Option A, and B are correct.

The peptide bond is formed between the carboxyl group (-COOH) of one amino acid and the amino group (-NH₂) of another amino acid, with the loss of a water molecule. So, in order for two molecules to be joined together by a peptide bond in a dehydration reaction, one molecule should have a carboxyl group and the other should have an amino group.

Option 3 and 12: molecule 3 is glycine, which has an amino group (-NH₂) and molecule 12 is glutamic acid, which has a carboxyl group (-COOH). So, they could be joined together by a peptide bond in a dehydration reaction.

Option 13 and 7: molecule 13 is proline, which has an amino group (-NH₂) and molecule 7 is aspartic acid, which has a carboxyl group (-COOH). So, they could be joined together by a peptide bond in a dehydration reaction.

Option 8 and 9: both molecules 8 and 9 are nucleotides and do not contain amino or carboxyl groups. So, they cannot be joined together by the peptide bond in dehydration reaction.

Hence, A. B. 3 and 12, 13 and 7 is the correct option.

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--The given question is incomplete, the complete question question is

"Az Which of the following pairs of molecules could be joined together by peptide bond in a dehydration reaction? A) 3 and 12 B) 13 and 7 C) 8 and 9."--

Answer: The first question’s answer is 2 and the second question answer is 3. 12.B, 13.C

Explanation:

The solution is the mass of C8H18 is 69 grams and the mass of C7H8 is 92 grams.

Given: The hydrocarbon mixture contains two hydrocarbons - C8H18 and C7H8.Mass of the mixture = 161 g.Mixtures of two hydrocarbons, C8H18 (octane) and C7H8 (toluene), are burned in excess oxygen to form a mixture of carbon dioxide and water that contains 1.52 times as many moles of carbon dioxide as water. We need to calculate the masses of C8H18 and C7H8 in the mixture.

To calculate the mass of the mixture:Let the mass of C8H18 in the mixture = x gramsTherefore, the mass of C7H8 in the mixture = (161 - x) grams.Then, calculate the number of moles of CO2 and H2O produced.

Using stoichiometry,2 C8H18 + 25 O2 ⟶ 16 CO2 + 18 H2O(2 × moles of C8H18) + (25 × moles of O2) ⟶ (16 × moles of CO2) + (18 × moles of H2O)As per the given condition,Number of moles of CO2 = 1.52 × number of moles of H2OMass of CO2 = Moles of CO2 × Molar mass of CO2 = 1.52 × Moles of H2O × Molar mass of CO2 = 1.52 × (18 × 2 × Moles of C8H18) × 44/22 = 132 × Moles of C8H18Mass of H2O = Moles of H2O × Molar mass of H2O = (18 × 2 × Moles of C8H18) × 18/1000 = 0.648 × Moles of C8H18Therefore, we have the following equation:Mass of C8H18 + Mass of C7H8 = 161 grams => x + (161 - x) = 161 grams=> x = 69 grams => Mass of C8H18 = 69 g.Mass of C7H8 = (161 - 69) g = 92 g.

Thus, the masses of C8H18 and C7H8 in the mixture are 69 g and 92 g, respectively. Hence, the solution is the mass of C8H18 is 69 grams and the mass of C7H8 is 92 grams.

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The molar concentration of Al(OH)₃ in the solution is 1.61 M.

we need to calculate the number of moles of Al(OH)3 in the solution:

Number of moles of Al(OH)₃ = mass of Al(OH)3 / molar mass of Al(OH)3

Molar mass of Al(OH)₃ = (1 x atomic mass of Al) + (3 x atomic mass of O) + (3 x atomic mass of H)

Molar mass of Al(OH)₃ = (1 x 26.98 g/mol) + (3 x 16.00 g/mol) + (3 x 1.01 g/mol) = 78.00 g/mol

Number of moles of Al(OH)₃ = 62.7 g / 78.00 g/mol = 0.804 moles

Next, we need to calculate the volume of the solution in liters:

Volume of solution = 500.0 mL = 500.0 mL x (1 L/1000 mL) = 0.500 L

Finally, we can calculate the molar concentration of Al(OH)₃

Molarity = moles of solute/volume of solution in liters

Molarity = 0.804 moles / 0.500 L = 1.61 M

Therefore, the molar concentration of Al(OH)₃ in the solution is 1.61 M.

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A proportionality constant that represents the link between the molar concentration of reactants and the rate of a chemical reaction is denoted by the letter "k," which stands for the rate constant.

To find the rate constant at 50 °C for a reaction with a rate constant of 0.010 s-1 and an activation energy of 35.8 kJ, we will use the Arrhenius equation.

What is the Arrhenius equation?

The Arrhenius equation is an equation that relates the rate constant of a chemical reaction to temperature and activation energy.

Determining the rate constant:

The equation is written as: k = Ae^(-Ea/RT)

Where:k is the rate constant

T is the absolute temperature in Kelvin

R = 8.3145 J/Kmol

Converting the activation energy to J/mol:35.8 kJ/mol x 1000 J/kJ = 35,800 J/mol

Given:

T1 = 25°C = 298 K (Kelvin)T2 = 50°C = 323 K (Kelvin)Ea = 35,800 J/molk1 = 0.010 s^-1

Using the Arrhenius equation:

k2/k1 = e^(-Ea/R) [(1/T2) - (1/T1)]k2/0.010 s^-1 = e^(-35,800 J/mol / 8.3145 J/Kmol) [(1/323 K) - (1/298 K)]k2 = 0.010 s^-1 x e^(12,717.1 J/mol / 8.3145 J/Kmol) [0.0033 K^-1]k2 = 0.087 s^-1 (3 significant figures)

Therefore, the rate constant at 50°C is 0.087 s-1.

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Answer:

A

Explanation:

it causes the genes of two different individuals to mix

Answer:

Explanation:

A. It causes the genes of two different individuals to mix.

The steps that can be used as a rationale for the absence of Ag in an unknown solution (but with Pb²⁺ present) in a chemical analysis experiment are: a, b, d, e, and h.

Steps (a), (b), (d), (e), (f), and (g) can be used as a rationale for the absence of Ag in an unknown solution with Pb²⁺ present in a chemical analysis experiment. The lack of yellow precipitate with KyCrO, no blackening of the white solid with NaOH and SnCl₂, and the absence of a white precipitate with 6M HCl suggest the absence of Ag.

The presence of a light blue decantate in step 1-A and the lack of dark blue solution after the addition of 15M NH₃ further support this conclusion. Additionally, the absence of a white precipitate in step 2-B and the lack of reddish-brown precipitate after adding KFe(CN)₆⁻ also indicate the absence of Ag in the unknown solution.

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--The complete question is, Which step(s) can be used as a rationale for the absence of Ag in an unknown solution (but with Pb²⁺ present) in a chemical analysis experiment? Select all that apply:

a. A yellow precipitate did not form when KyCrO was added in step 1-C.

b. The white solid did not turn black upon addition of NaOH and SnCl2.

c. The presence of a light blue decantate in step 1-A.

d. All of the white precipitate from step 1-A dissolved in hot water.

e. A lack of dark blue colored solution after addition of 15 M NH3.

f. A white precipitate did not form in step 2-B.

g. A reddish brown precipitate did not form after adding K Fe(CN)6-

h. The white precipitate from step 1-B dissolved in 6 M NH3 and then reformed when 6 M HNO3 was added.

Note: The question is referring to a specific chemical analysis experiment, where the absence of Ag needs to be justified in an unknown solution with the presence of Pb²⁺.--

Answer: \(^{218}_{84}Po \rightarrow ^{218}_{85}At + ^{0}_{-1}e\) is the correct equation for beta decay.

Explanation:

When a beta particle, that is, \(^{0}_{-1}e\) is emitted in a radioactive decay then it is known as beta decay.

Therefore, beta decay of Polonium-218 is as follows.

\(^{218}_{84}Po \rightarrow ^{218}_{85}At + ^{0}_{-1}e\)

Therefore, we can conclude that \(^{218}_{84}Po \rightarrow ^{218}_{85}At + ^{0}_{-1}e\) is the correct equation for the given beta decay.  

Answer:

A

Explanation:

The top dudes answer summed up.

Explanation:

A because A galvanic cell consists of two half-cells, such that the electrode of one half-cell is composed of metal A, and the electrode of the other half-cell is composed of metal B; the redox reactions for the two separate half-cells are thus: An+ + ne− ⇌ A.

Answer:

A

Explanation:

The vibrational partition function (Q) for chlorine at 25°C, summing over the lowest 4 vibrational levels, is given by the simplified expression: Q = e^(-2.220).

The relative population between the first and second excited vibrational energy levels (N1/N2) of chlorine at 298 K (25°C) can be calculated using the relative Boltzmann factors, taking into account the energies of the levels and the Boltzmann constant.

The vibrational partition function (Q) represents the sum of the Boltzmann factors for all the vibrational energy levels. For a diatomic molecule like chlorine (Cl2), assuming equally spaced vibrational energy levels and a degeneracy (g) of 1 for each level, we can calculate the partition function.

To calculate Q, we sum over the lowest 4 vibrational levels, taking into account the energy spacing between levels.

The energy spacing between levels is given as 558 cm^(-1), which we convert to Joules using the conversion factor of 1 cm^(-1) = 1.986445 × 10^(-23) J.

Using the formula for the partition function:

Q = e^(-E1/(kT)) + e^(-E2/(kT)) + e^(-E3/(kT)) + e^(-E4/(kT))

Substituting the values:

Q = e^(-5581.98644510^(-23)/(1.3806510^(-23)(25+273)))

Simplifying the exponent and performing the calculations:

Q ≈ e^(-2.220)

Therefore, the vibrational partition function (Q) for chlorine at 25°C, summing over the lowest 4 vibrational levels, is approximately e^(-2.220).

The relative population between the first and second excited vibrational energy levels (N1/N2) of chlorine at 298 K (25°C) can be calculated using the relative Boltzmann factors, taking into account the energies of the levels and the Boltzmann constant.

The relative population (N1/N2) between two vibrational energy levels can be determined using the Boltzmann factors, which depend on the energies of the levels and the temperature.

The energy difference between the ground state and the first excited level is given as 558 cm^(-1), which we convert to Joules using the conversion factor of 1 cm^(-1) = 1.986445 × 10^(-23) J.

Using the Boltzmann factor formula:

N1/N2 = e^(-ΔE/(k*T))

Substituting the values:

N1/N2 = e^(-5581.98644510^(-23)/(1.38065*10^(-23)*298))

Simplifying the exponent and performing the calculations:

N1/N2 ≈ e^(-1.524)

Therefore, the relative population between the first and second excited vibrational energy levels (N1/N2) of chlorine at 298 K (25°C) is approximately e^(-1.524).

Note: The relative population is given as a ratio of the populations between the two levels.

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Answer: 652.8 g of iron (III) oxide produced.

Explanation:

To calculate the amount of iron (III) oxide produced, we use the enthalpy change of the reaction to determine the amount of energy released and convert it to moles of Fe2O3 produced. Then, we multiply by the molar mass of Fe2O3 to obtain the mass of Fe2O3 produced. Using these calculations, we get 652.8 g of iron (III) oxide produced.

580.84 grams of iron (III) oxide will be produced when 4300 kJ of heat energy is released.

Given:

Enthalpy change (∆H) value: ∆H = -1652 kJ

Amount of heat energy released: 4300 kJ

From the balanced equation:

4Fe + 3O₂ → 2 Fe₂O₃

The molar ratio between Fe₂O₃ and ∆H is 2:1652 kJ.

To find the molar amount of Fe₂O₃ produced, the following calculation:

\(4300 \times \frac{2}{1652}\) = 5.20 mol Fe₂O₃

To convert this into grams, it is required to multiply the molar amount by the molar mass of Fe₂O₃:

5.20  × 2  × 55.85 = 580.84 g

Therefore, 580.84 grams of iron (III) oxide will be produced when 4300 kJ of heat energy is released.

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Answer:

False

Explanation:

Solubility refers to the ability of a substance to dissolve in a solvent, usually a liquid. It is a measure of the amount of a substance that can dissolve in a given amount of solvent at a given temperature. Solubility is not related to the ability of a substance to burn.

Answer:

becomes negatively charged

Explanation:

this is because when an object receives electrons it becomes negatively charged and the object that loses electrons becomes positively charged.

Answer:

First one because by adding more electrons it makes something more negative. So it becomes negatively charged

Answer:

The superscript after the letter

tells us the electrons are in the n=2 energy level.

Explanation:

As a gaseous element condenses, the atoms become closer together and they have more attraction for one another.

The transformation of water vapour into liquid is known as condensation. The process is the opposite of evaporation, in which liquid water turns into a vapour. Either the air is chilled to its dew point or it gets too saturated with water vapour to retain any more water, causing condensation to occur.

Attraction - Gas Particles move continuously in a straight path in a gas. They are significantly further apart and move independently of one another because the kinetic energy of the molecule is larger than the attraction force between them. There are often almost no attractive forces between particles.

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Answer:

Explanation:

The density of a substance can be found by using the formula

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

From the question

mass of sphere = 4000 g

Volume of a sphere is given by

\(V = \frac{4}{3} \pi {r}^{3} \\ \)

where r is the radius

\(r = \frac{diameter}{2} \\ \)

From the question

diameter = 150 cm

\(r = \frac{150}{2} = 75 \: \: \: cm\)

The volume of the sphere is

\(V = \frac{4}{3} \times {75}^{3} \pi \\ = \frac{4}{3} \times 421875\pi \\ = 562500\pi \\ = 1767145.86...\)

We have the answer as

volume = 1767145.86 cm³

So we have

\(density = \frac{4000}{1767145.86} \\ = 0.002263536...\)

We have the final answer as

Hope this helps you

1. The bacterial cell shown is a prokaryotic cell.

2a. The similarities between prokaryotic and eukaryotic cells include:

2b. The differences between prokaryotic and eukaryotic cells include:

Eukaryotic cells are cells that possess a membrane-bound nucleus as well as membrane-bound cell organelles.

Eukaryotic cells are cells of higher organisms such as animals and plants.

Prokaryotic cells are cells that lack a membrane-bound nucleus as well as membrane-bound cell organelles.

Prokaryotic cells are cells of lower organisms such as bacteria.

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Answer:

Endothermic , this is correct answer