if a nitrogen atom and a slightly heavier oxygen atom have equal average speeds, which has the greater kinetic energy?

Answer:false

Explanation:

Answer:

Diffusion and Dispersion.

Explanation:

The two processes that took place in the given experiment are Diffusion and Dispersion.

When a crystal of potassium magnet is added placed in the bottom of a beaker which contains cold water, after 5 minutes the particles of potassium magnet will diffuse with water through diffusion process and the colour of water turns purple.

After few hours, the colour of solution goes light purple because the tiny particles which were diffused earlier will dispersed in the water and the particles will spread and make the solution lighter in colour.

Hence, the two processes are Diffusion and Dispersion.

Answer:

a

Explanation:

Mass number = No of protons + No of neutrons

Atomic number = No of protons

Mass number = 46 (from question)

Atomic number of Ca = 20

therefore:

46 = 20 + no of neutrons

no of neutrons = 26

A model helps to explain a physical reality.

A model is a representation of reality. It often serves the  purpose of explanation or prediction. The question is incomplete but I will try to explain what a model is.

There are several kinds of models such as;

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The claim that vinyl gloves have a higher leak rate than latex gloves is supported by the study at a significance level of 0.005.

To determine if vinyl gloves have a higher leak rate than latex gloves, we can conduct a hypothesis test.

The z-value is calculated as:

z = (p₁ - p₂) / √((p₁(1 - p₁) / n₁) + (p₂(1 - p₂) / n₂))

where p₁ and p₂ are the sample proportions, and n₁ and n₂ are the sample sizes.

Certainly! Let's calculate the z-value to determine if vinyl gloves have a higher leak rate than latex gloves.

For vinyl gloves:

Sample size (n₁) = 240

Leaking gloves (x₁) = 0.63 * 240 = 151.2 (approximated to 151)

For latex gloves:

Sample size (n₂) = 240

Leaking gloves (x₂) = 0.07 * 240 = 16.8 (approximated to 17)

We will calculate the z-value using the formula:

z = (p₁ - p₂) / √((p₁(1 - p₁) / n₁) + (p₂(1 - p₂) / n₂))

where p₁ and p₂ are the sample proportions.

p₁ = x₁ / n₁ = 151 / 240 ≈ 0.629

p₂ = x₂ / n₂ = 17 / 240 ≈ 0.071

Calculating the z-value:

z = (0.629 - 0.071) / √((0.629 * (1 - 0.629) / 240) + (0.071 * (1 - 0.071) / 240))

z ≈ 13.239

The calculated z-value is approximately 13.239. To determine if the claim is supported, we compare this value to the critical z-value for a one-tailed test at a significance level of 0.005.

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Mass of H₂SO₄ : 69,972 g

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

moles of H₂SO₄ :

\(\tt mol=\dfrac{N}{No}\\\\mol=\dfrac{4.3\times 10^{26}}{6.02\times 10^{23}}\\\\mol=7.14\times 10^2\)

mass H₂SO₄ (MW=98 g/mol) :

\(\tt mass=mol\times MW\\\\mass=7.14.10^2\times 98\\\\mass=69,972~g\)

For getting an indication whether a chemical reaction or chemical change has taken place, if  B)Heat is given off then chemical reactions occur. So,correct option is B.

Chemical reactions are surrounding us, from the digestion of food in our body to how the light we get from the sun is the consequence of compound responses. Prior to starting with compound responses, realizing about physical and synthetic changes is significant

Option A can't be the response is dissolving is an actual change. No substance response occurred.

Option B is the response as it is an EXOTHERMIC reaction so intensity will be emitted.

Option C can't be the response as dissolving is essentially ions becoming particles, not a synthetic response by which a reactant responds with one more reactant to shape an item.

Option D can't be the response. Same explanation with respect to why An isn't the response.

Hence, correct option is B.

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(Complete question) is:

When determining whether a chemical reaction has taken place, you observe and look for several indicators. Which would be considered an indication that a chemical reaction or chemical change has taken place? A) Solid melts. B) Heat is given off. C) Substance dissolves D) Substance changes shape.

A model that shows how electrons orbit atom nuclei is known as an electronic configuration diagram.

The number of protons in an atom's nucleus or the number of electrons in an electrically neutral atom is the atomic number of that element. The capital letter Z is used to represent it. Atomzahl, a more contemporary word for atomic number in German, is where the letter Z gets its name.

Electrons are arranged around the central nucleus in energy levels, or shells, and are shown as dots or crosses. It  known as electrodot diagrams display the distribution of an atom's valence electrons as dots around the element's symbol.

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Answer:

To calculate the specific heat of the rock, you can use the formula for heat transfer: Q = mcΔT, where Q is the heat transferred, m is the mass of the substance, c is the specific heat capacity and ΔT is the change in temperature.

In this case, we can assume that the heat lost by the rock is equal to the heat gained by the water. Therefore:

Q(rock) = Q(water)

m(rock)c(rock)(T(final) - T(initial, rock)) = m(water)c(water)(T(final) - T(initial, water))

where m(rock) = 6.7 g, T(initial, rock) = 100.0°C, T(final) = 45°C, m(water) = 100.0 g (assuming the density of water is 1 g/mL), c(water) = 4.18 J/g°C (specific heat capacity of water), and T(initial, water) = 23°C.

Substituting these values into the equation above and solving for c(rock), we get:

c(rock) = (m(water)c(water)(T(final) - T(initial, water))) / (m(rock)(T(final) - T(initial, rock)))

c(rock) = (100.0 g * 4.18 J/g°C * (45°C - 23°C)) / (6.7 g * (45°C - 100.0°C))

c(rock) ≈ 1.26 J/g°C

So the specific heat of the rock is approximately 1.26 J/g°C.

Answer:

A. Algae growth is high

Explanation:

Substances that contains high concentration of nitrates, phosphates etc add nutrients to the water body. This is because organisms like ALGAE consider these compounds nutrients needed for their growth and development. The process whereby these nutrients becomes excessive in a water body is referred to as EUTROPHICATION.

Eutrophication of a water body i.e excessive nutrients like nitrates in a water body like the North Carolina waters being described in this question will lead to rapid and excessive growth of algal species. This increase in algal growth can cause the water body to be low in oxygen content and ultimately become inhabitable by living organisms.

The molarity of a solution formed when you add 200 mL of water to 50 mL of 5. 0 M HCl is 1.25M.

The molarity of a solution can be calculated using the following formula:

M1V1 = M2V2

Where;

M1 × 200 = 50 × 5

200M1 = 250

M1 = 250/200

M1 = 1.25M

Therefore, the molarity of a solution formed when you add 200 mL of water to 50 mL of 5. 0 M HCl is 1.25M.

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Answer:

No

Explanation:

Napthalene cannot conduct electricity

Answer:

The independent variable in this experiment is the type of chalk (crushed to powder vs solid). The dependant variable is the amount of time it takes for the chalk to dissolve. Controlled variables include the type of vinegar used, the temperature of the vinegar, and the amount of chalk used in each beaker.

Explanation:

The significance of polar and non-polar amino acids lies in their interactions within a protein structure. Polar amino acids are typically found on the surface of the protein, where they interact with water molecules and other polar molecules. Non-polar amino acids, on the other hand, are typically found in the interior of the protein, where they interact with other non-polar amino acids through hydrophobic interactions.

Amino acids are the building blocks of proteins, and they can be categorized as either polar or non-polar. Polar amino acids have a hydrophilic (water-loving) nature due to their polarity, while non-polar amino acids have a hydrophobic (water-fearing) nature due to their lack of polarity.

The balance between polar and non-polar amino acids is crucial in determining the overall structure and function of a protein. If there are too many polar amino acids in the interior of a protein, it may become unstable and unfold. Conversely, if there are too many non-polar amino acids on the surface of a protein, it may not be able to interact effectively with other molecules.

Overall, the significance of polar and non-polar amino acids lies in their ability to contribute to the stability and function of proteins. Understanding the properties of these amino acids is important in fields such as biochemistry and drug development.

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Answer:

Its electrical charge is -2.

The independent variable in this investigation is the ice cubes added. The correct option is 2.

A scientific experiment is an experiment that is done to calculate or check out a reason for scientific things to happen. It is done with variables, these variables are controlled, independent, and dependent.

The cause is the independent variable. Its value is unaffected by the other study variables. In this instance, the amount of ice in each sample of water determines its temperature. So, the independent variable is the amount of ice.

Therefore, the correct option is 2. Ice cubes were added.

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Regardless of solubility, a cell signaling molecule could not affect a target cell without specific receptor proteins within the cell or in the plasma membrane

Cells typically communicate using chemical signals. These chemical signals, which are proteins or other molecules produced by a sending cell, are often secreted from the cell and released into the extracellular space. There, they can float – like messages in a bottle – over to neigh

Not all cells can “hear” a particular chemical message. In order to detect a signal (that is, to be a target cell), a neighbor cell must have the right receptor for that signal.

When a signaling molecule binds to its receptor, it alters the shape or activity of the receptor, triggering a change inside of the cell. Signaling molecules are often called ligands, a general term for molecules that bind specifically to other molecules (such as receptors).

The message carried by a ligand is often relayed through a chain of chemical messengers inside the cell. Ultimately, it leads to a change in the cell, such as alteration in the activity of a gene or even the induction of a whole process, such as cell division. Thus, the original intercellular (between-cells) signal is converted into an intracellular (within-cell) signal that triggers a response.

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Answer:

12.5grams would remain after time has elapsed

The statement as we see that it has been written in the question is known to be true.

The correct chemical equation for the reaction between lithium and zinc acetate is:

Li + Zn(CH3COO)2 → LiCH3COO + Zn. This reaction yields lithium acetate (LiCH3COO) and solid zinc (Zn).

As we can see, the question said that  Lithium plus zinc acetate yields lithium acetate plus zinc. This implies that the what the question said and the actual reaction equation is the same as Lithium can displace zinc.

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Answer:

D. The man is the antagonist because he is opposing Buck.

Explanation:

I just took the quiz.

Answer:

reagents that can be used to convert CH3MgBr to CH4 are?

a) H2O

b) CH3-C - - -(triple bond) CH

c) R3CH

d)H2C=CH2

its a) H20

Answer:

IM just too pogchamp

Explanation:

Answer:

Explanation:

It's called a Redbox reaction because when a change in oxidation number occurs in a reaction, with both an increase in number and a decrease in number, then the reaction is classified as redox. If this doesn't occur, then the reaction is non- redox.

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If we mixed 3 moles of HBr with 2 moles of KOH in enough water to make 1 liter of solution, then the amount of KBr that would be formed would be 3 moles.

The balanced chemical equation for the reaction between HBr and KOH is:

HBr + KOH → KBr + H2O

In the given case, we have 3 moles of HBr and 2 moles of KOH

Their mole ratio = 1.5:1.

This means that for every 1.5 moles of HBr, we have 1 mole of KOH, which will be enough to react with all the HBr.

So, the amount of KBr formed would be 3 moles, which is the same as the amount of HBr that was added to the reaction.

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The appropriate USP <795> BUD for Magic Mouthwash depends on whether it is compounded and dispensed as an oral formulation or as a mucosal formulation.

Oral formulations have a BUD of no more than 7 days and mucosal formulations have a BUD of no more than 14 days. The BUD should be determined based on the shortest expiry date of the three ingredients that make up Magic Mouthwash, as well as the conditions of storage.

Additionally, the specific conditions of storage such as temperature, humidity, and light can also affect the BUD of the mouthwash. It is recommended to consult the manufacturers of the active ingredients to determine the appropriate BUD for Magic Mouthwash.

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Answer:

a

barium

b

calcium

e

aluminum

f

magnesium

g

copper

Forms cation

Explanation:

Answer:

Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. ... The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other.

Explanation:

brainlest pls

\( \huge \boxed{\mathbb{QUESTION} \downarrow}\)

\( \huge \boxed{\mathfrak{Answer} \downarrow}\)

Answer:

When two distinct elements are chemically combined.

Explanation:

Chemical bonds form between their atoms the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl)

Ethanol can be separated from a mixture by a process called fractional distillation.

This method is used to separate a mixture of two or more liquids with different boiling points. In this case, ethanol will be separated from the other two components in the mixture. The first step is to set up a fractional distillation apparatus. This consists of a round bottom flask with a heating mantle, a distillation column packed with glass beads or other material, and a condenser. The round bottom flask is filled with the mixture to be separated, and the apparatus is assembled.

Next, the mixture is heated gradually using the heating mantle. As the temperature increases, the components of the mixture with lower boiling points will begin to vaporize and rise up the distillation column. In this case, ethanol will be the first component to vaporize. The vaporized ethanol will then travel up the distillation column and into the condenser, where it will be cooled and condensed back into a liquid form. This liquid can then be collected in a separate flask.

The process is continued until all of the ethanol has been collected. The other two components in the mixture will remain in the round bottom flask, as they have higher boiling points and will not vaporize at the temperature used.

In conclusion, the process of fractional distillation is an effective method for separating a mixture of liquids with different boiling points. In this case, the student can separate ethanol from the mixture by using a fractional distillation apparatus and gradually heating the mixture until the ethanol is vaporized and collected in a separate flask.

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