Give examples of kinetic energy and how they work.

Explanation:

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The molecular formula for a compound that is 33.38% sulfur and 66.62% oxygen and has a molar mass of 192.14 g is SO₄, and the molecular formula for a compound that is 26.37% carbon, 5.541% hydrogen, 52.70% oxygen, and 15.38% nitrogen and has a molar mass of 182.16 g is C₉H₈NO₃.

The molecular formula of a compound is a way to represent the number and types of atoms that make up a molecule and is used to identify and distinguish between different compounds, which is important in chemistry and biochemistry as it can help predict the compound's physical and chemical properties.

Hence, the molecular formula for a compound that is 33.38% sulfur and 66.62% oxygen and has a molar mass of 192.14 g is SO₄, and the molecular formula for a compound that is 26.37% carbon, 5.541% hydrogen, 52.70% oxygen, and 15.38% nitrogen and has a molar mass of 182.16 g is C₉H₈NO₃.

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The heating curve is a graphical representation of how various phases of substances change as temperature or heat increases. The graph's C section depicts the liquid phase of the substance gaining kinetic energy.

Kinetic energy is the energy that an object has as a result of its movement. If we want to accelerate an object, we must apply force to it. Using force requires us to put in effort. When the work is finished, energy is transferred to the object, and it moves at a new constant speed.

Therefore,

Section A represents the solid phase

Section B the solid-liquid phase

Section C the liquid phase

Section D the liquid-gas phase

Section E the gas phase

Section C of the graph depicts the substance's liquid phase gaining kinetic energy. Heat energy is absorbed during Phase C, and liquid particles gain kinetic energy to change into gas form in Section E.

As a result, C.C. is the correct answer.

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The given statement "The ability of a buffer to function effectively depends on the pH of the solution and the concentration of the buffer" is true. Because, buffer is a solution that can resist changes in pH when small amounts of acid or base are added.

When an acid or base is added to a buffer solution, it reacts with the buffer to produce a conjugate acid or base, which minimizes changes in the pH of the solution. The buffer system works best when the pH of the solution is close to the pKa of the buffer. At this pH, the buffer is in its most effective form and can neutralize added acid or base most efficiently.

The concentration of the buffer is also important because the amount of acid or base that a buffer can neutralize depends on the amount of buffering agents present in the solution. The more buffering agents present, the more acid or base the buffer can neutralize before the pH of the solution changes significantly.

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The reaction that does not occur in a beaker is;

- CH4(g) + 2O2(g) → CO2(g) + 2H2O(ℓ) + 213 kcal

In a beaker, it is unlikely that all of these conditions will be met for a combustion reaction to occur. For example, there may not be enough fuel present in the beaker to sustain a combustion reaction, or there may not be enough oxygen to support the reaction.

Additionally, an ignition source such as a spark or flame is usually necessary to initiate the reaction, which is unlikely to be present in a beaker.

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Answer: The proportions of components can vary.

Explanation:

A mixture is a combination that has to do with two or more substances. Some characteristics or properties of mixtures are that the substances that are added together retain their properties.

Also, the proportion of the components can vary and the components can be separated.

Therefore, the answer to the question will be option 3 "The proportions of components can vary".

The answer is 12 Oxygen are present in an Al₂(SO₄)₃ molecule. Aluminum sulfate, or Al₂(SO₄)₃, is a salt, hence option D is correct.

In aluminum sulfate, there are two atoms of aluminum (Al), three atoms of sulfur (S), and twelve atoms of oxygen (O).

Each of the three sulfate anions (SO42) has four oxygen atoms and one sulfur atom. Sulfate has a charge of -2 and aluminum has an oxidation number of +3.

Water is soluble in the chemical molecule known as aluminum sulfate (Al2 (SO4)3). The substance is mostly utilized as a coagulant in the production of paper, wastewater treatment, and water purification.

Therefore, 12 Oxygen are present in an Al₂(SO₄)₃ molecule.

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Answer:

The answer is A.

Explanation:

Universe was smaller and galaxies were closer together in past, galaxy collisions were common in past (distorted galaxies were common in early universe).

The photon that carries more energy is the blue photon, and it carries around 50% more energy than the average orange photon (590-620 nm). The law used to solve the previous problem suggests that energy is proportional to the frequency of an electromagnetic wave. Thus, the higher the frequency, the higher the energy. The correct option is C.

In electromagnetic radiation, the energy carried by each photon is directly proportional to the frequency and inversely proportional to the wavelength. Thus, higher frequency photons carry more energy than lower frequency photons.

A photon's energy is directly proportional to its frequency and inversely proportional to its wavelength. Thus, higher frequency photons, such as blue photons, carry more energy than lower frequency photons, such as orange photons. The energy of a photon is given by the equation: E = hf

Where E is energy, h is Planck's constant (6.63 x 10⁻³⁴ J s), and f is frequency.

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We would classify this as chemical property of matter.

Chemical properties are the properties that can only be observed when a matter undergoes a change to become a different type of matter. Chemical change may alter the composition of original matter.

Following are the types of chemical properties;

1.Reactivity

2.Toxicity

3.Flammability

Reactivity is the aptness of matter to combine with other substances.

Toxicity is the extent to which a combination of chemicals may harm an organism.

Flammability is the aptness of matter to burn.

Chemical properties can only be detected when a material is in the process of being changed into another substance.

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Answer:

Explanation:

Mide 2mL de etanol, añadelo a un matraz aforado, pon agua hasta llegar a 100mL

To calculate the energy required to heat up a sample, we can use the formula:

Q = m * c * ΔT

where Q is the energy required (in Joules), m is the mass of the sample (in grams), c is the specific heat capacity of the material (in J/g°C), and ΔT is the change in temperature (in °C).

In this case, we are given:

m = 50 g (mass of the sample)

ΔT = t2 - t1 = 78°C - 12°C = 66°C (change in temperature)

However, we need to convert the volume (65.0 mL) to mass in order to use the formula. We can do this by multiplying the volume by the density of the material. Let's assume the material is water, which has a density of 1 g/mL at room temperature:

V = 65.0 mL (volume of the sample)

ρ = 1 g/mL (density of water at room temperature)

So, the mass of the sample is:

m = V * ρ = 65.0 mL * 1 g/mL = 65.0 g

Now we can calculate the energy required:

Q = m * c * ΔT = 65.0 g * 4.18 J/g°C * 66°C = 17379.6 J

Therefore, the energy required to heat up 65.0 mL of water (assuming it's water) from 12°C to 78°C is approximately 17379.6 J.

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Answer:

480 L

Explanation:

In order to solve this question, you should be familiar with gas laws. (I will attach a picture showing all of them under my answer.) In this question in particular, however, we only need Charles's Law because we're dealing with temperature and volume.

As we can see, Charles's Law is:

\(\frac{V_{1} }{T_{1} } = \frac{V_{2} }{T_{2} }\)

or, initial volume over initial temperature equals final volume over final temperature.

In this question, 60 L is our initial volume, and 0.5 K is our initial temperature (K being Kelvin). We are only given 4 K as our final temperature. We are asked to solve for the final volume. Let's set up the equation and solve for \(V_{2}\):

--------------------------------------------------------------------------------------------------------------

(60) / (0.5) = \(V_{2}\) / (4)

↓

120 = \(V_{2}\) / 4

×4           ×4

↓

\(V_{2}\) = 480 L

--------------------------------------------------------------------------------------------------------------

There's our answer! Feel free to comment if you have any questions about my answer :)

Answer:

Explanation:

The balanced chemical equation is Cl2 + 2KBr → 2KCl + Br2. The amount of bromine is calculated as follows:

11.0 g KBr (1mol KBr/119.002g KBr * 1mol Br2/2mol KBr * 159.808g Br2/1mol Br2= 7.39 g Br2.)

The volume of 0.0500 mol/L Kmn04 required is 0.00083 / 0.0500 = 0.0167 L = 16.7 mL, rounded to 20.0 mL.

To balance the equation, we need to add 5 electrons to the right side to match the electrons on the left side:

MnO4^- + 8H^+ + 5e^- -> Mn^2+ + 4H2O

Br^- + 2H^+ + 1e^- -> Br2 + H2O

Adding the two reactions together, we get:

MnO4^- + 8H^+ + 5e^- + Br^- + 2H^+ + 1e^- -> Mn^2+ + 4H2O + Br2 + H2O

This reaction requires 6 electrons in total, which means that 6 moles of Br^- will be oxidized by 1 mole of MnO4^-.

Since the concentration of NaBr is 0.200 mol/L, there are 0.200 x 25.0 mL / 1000 mL = 0.005 mol of Br^- in the solution.

To oxidize all the Br^-, we need 0.005 / 6 = 0.00083 moles of MnO4^-

So the volume of 0.0500 mol/L Kmn04 required is 0.00083 / 0.0500 = 0.0167 L = 16.7 mL, rounded to 20.0 mL.

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The chemical has a molar mass of 72.1 g/mol.

One mole of a chemical has a mass known as its molar mass. The measurement unit is grams per mole (g/mol). We need to know the sample's weight in grams and the number of molecules in order to determine the molar mass of the substance.

In this instance, we are informed that 8.35 x 1021 molecules make up 1.00 grams of the chemical. This knowledge allows us to calculate the molar mass.

We must first determine how many moles are present in the sample. Use the following formula to accomplish this:

Mass of the sample / Molar mass = number of moles

Formula rearranged to account for molar mass:

Molar mass is equal to the mass of the sample divided by the number of moles.

When the values are plugged in, we get:

Sample weight is 1 gram.

8.35 x 1021 molecules are the number of moles.

We can now determine the molar mass:

Molar mass is equal to 1 gram divided by 8.35 x 1021 molecules.

By converting grams to kilograms, we can make the math simpler:

Molar mass is equal to 1.00 x 10-3 kg divided by 8.35 x 1021 molecules.

Now that the units have been cancelled, we can simplify:

Molar mass is calculated as follows: (1.00 x 10-3 kg) / (8.35 x 10-21 molecules) = 1.20 x 10-24 kg/molecule.

The molar mass can finally be converted to grams per mole as follows:

Molar mass is equal to 1.20 x 10-24 kg/molecule times 1000 g/kg times 6.02 x 1023 molecules/mol, or 72.1 g/mol.

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Answer:

The answer according to me.............

Explanation:

Answer:

hmm that is a very tricky question. probably from over flooding with water

Answer:

128.98 g/Mol

Explanation:

ΔTb = Kb * m * i

Where;

ΔTb = boiling point elevation

Kb = boiling point constant

m = molality of the solution

i = Van't Hoff factor

Hence;

Where molality = number of moles of solute/mass of solvent in Kg

Number of moles of solute = mass/Molar mass

So;

80.61 - 80.10 = 2.53 * 13g/M/0.5 * 1

Where M is the molar mass of the solute

0.51 = 2.53 * 13g/M/0.5

0.51 = 2.53 * 13/M * 1/0.5

0.51 = 32.89/M * 1/0.5

0.51 * 0.5 = 32.89/M

0.255 M = 32.89

M = 32.89/0.255

M= 128.98 g/Mol

Answer:

Are we talking about body temperature or atmospheric temperature?

Five observable properties for separating mixtures are particle size, colour, texture, shape, magnetic attraction.

Mixtures are compounds that are made up of two or more chemical compounds which are not linked to each other chemically. They can be easily separated.

The mixtures can be separated by properties like particle size, colour, density, shape, magnetic attraction.

Sieving can be used to separate compounds based on particle size. Chromatography can be used to separate compounds based on colour as each colour would have differences in properties. Flotation can be used to separate compounds based on density like oil in water. Centrifugation can be used to separate compounds based on shape. Magnetic separation can be used to separate metals from non-metal compounds in a mixture.

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Answer:

Balanced Chemical Equation:

H3PO4 + 5HCl → PCl5 + 4H2O

When red blood cells are placed in Solution A, which contains 150 mM NaCl, no significant changes occur because the concentration of sodium chloride is similar to that of the cells' internal environment. The isotonic nature of Solution A ensures that there is no net movement of water across the cell membrane, resulting in the cells maintaining their normal shape and size.

However, when comparing the tonicity of Solutions B, C, D, and E to Solution A and each other, differences arise. Tonicity refers to the osmotic pressure exerted by a solution on a cell and is influenced by the concentration of solutes within the solution. Solutions B and E both contain additional solutes along with NaCl.

Solution B, consisting of 100 mM glucose and 100 mM NaCl, has a higher tonicity compared to Solution A. Glucose cannot freely cross the cell membrane, creating an osmotic gradient that draws water into the red blood cells, causing them to swell.

Solution C contains 100 mM Drug X, a small non-polar molecule, along with 150 mM NaCl. Since Drug X is non-polar, it can freely cross the cell membrane. The presence of Drug X does not significantly affect the tonicity compared to Solution A, as it does not create an osmotic gradient.

In contrast, Solution D, which contains 150 mM MgCl2, has a higher tonicity than Solution A. MgCl2 dissociates into Mg2+ and Cl- ions, both of which cannot cross the cell membrane easily. The higher concentration of impermeable ions creates an osmotic gradient, leading to water loss from the red blood cells and causing them to shrink.

Lastly, Solution E consisting of 300 mM fructose has a higher tonicity compared to Solution A. Fructose cannot freely cross the cell membrane, resulting in an osmotic gradient that draws water into the red blood cells, causing them to swell.

In summary, placing red blood cells in Solution A does not produce significant changes in the cells. However, when comparing the tonicity of Solutions B, C, D, and E to Solution A and each other, variations in osmotic pressure occur due to the presence of different solutes.

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Answer:

Mam Mayank is joined....

Answer:

Which is the method that is used to separate and recover the parts of a liquid solution-Destillation.

The names of the given compounds are:

a) Carbon tetrachloride

b) 1-chloro-2-chloromethane (also known as chloroethyl chloride)

c) 1,2-dichloroethane

d) 2-chloro-2-methylbutane

e) 1,4-dichlorobutane

A compound is a substance made up of two or more different elements chemically combined in fixed proportions. The elements in a compound are held together by chemical bonds, which are formed when atoms of different elements share or transfer electrons to achieve a stable electron configuration.

Compounds have unique properties that are different from their constituent elements, such as melting point, boiling point, density, and reactivity. They can be formed through various chemical reactions, such as synthesis, decomposition, combustion, and oxidation. Examples of common compounds include water (H2O), table salt (NaCl), carbon dioxide (CO2), and glucose (C6H12O6).

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Answer:

There is an overall release of energy when bonds form.

Explanation:

There is a general release of energy when bonds form. This energy is called bond energy.

Bond energy is involved in the breakdown or formation of one or more bonds between atoms of a molecule. Atoms bond with each other to achieve their electronic stability, that is, they move from a higher energy situation to a lower energy one. With this we can state that when the bond between atoms is formed, energy is released; therefore, its breakdown depends on energy absorption.

Answer:Yes

Explanation:  Matter is everything around you.

Answer:

THE LAST ONE

Explanation:

Answer:

The molar mass of CO2 is 44.01 g/mol, whereas the molar mass of helium is 4.002602, since the mass is so much lighter for the helium it floats upwards because it is less dense than the air around it as well as being less dense than the CO2