Can anyone help me? :D

The empirical formula of the unknown compound is \(C_{5}H_{2}.\).

To determine the empirical formula of the unknown compound, we need to find the mole ratios of carbon and hydrogen in the compound based on the given masses of \(CO_{2}\) and \(H_{2}O\) produced.

1. Calculate the moles of  CO₂:

  Moles of  CO₂ = mass of  CO₂ / molar mass of  CO₂

              = 8.80 g / 44.01 g/mol (molar mass of CO₂)

              ≈ 0.1995 mol

2. Calculate the moles of \(H_{2}O\):

  Moles of \(H_{2}O\) = mass of \(H_{2}O\) / molar mass of \(H_{2}O\)

              = 1.44 g / 18.02 g/mol (molar mass of H₂O)

              ≈ 0.0799 mol

3. Determine the mole ratio between carbon and hydrogen:

  Carbon-to-hydrogen mole ratio = moles of  CO₂ / moles of \(H_{2}O\)

                               = 0.1995 mol / 0.0799 mol

                               ≈ 2.496

The mole ratio between carbon and hydrogen is approximately 2.496. To find the simplest whole-number ratio, we can multiply both values by a common factor to obtain whole numbers. In this case, we can multiply by 2 to get a whole number ratio of 5:2.

Therefore, the empirical formula of the unknown compound is C₅H₂.

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Answer:

Neutral

Explanation:

Neutralization reaction gets its name from the fact that the products of the reaction are _____.

neutral

The concentration of A → products, successive half-lives are observed to be 10.0, 20.0, and 40.0 min for an experiment in which [ A ] 0 = 0.10 M at the following times,

a. 80.0 min = 0.0107 M.

b. 30.0 min = 0.0471 M

To solve this problem, we can use the following equation for a first-order reaction:

ln([A]t/[A]0) = -kt

where [A]t is the concentration of A at time t, [A]0 is the initial concentration of A, k is the rate constant, and t is time.

From the given half-lives, we can find the rate constant k as follows:

k = (0.693/t1/2)

where t1/2 is the half-life.

For the given experiment, we have:

k1 = (0.693/10.0) = 0.0693 \(min^{-1}\)

k2 = (0.693/20.0) = 0.03465 \(min^{-1}\)

k3 = (0.693/40.0) = 0.017325 \(min^{-1}\)

a. To find the concentration of A at 80.0 min:

t = 80.0 min

[A]t = [A]0 × \(e^{(-kt)}\) = 0.10 × \(e^{(-(0.069380.0 + 0.0346580.0 + 0.017325 * 80.0))}\) = 0.0107 M

Therefore, the concentration of A at 80.0 min is 0.0107 M.

b. To find the concentration of A at 30.0 min:

t = 30.0 min

[A]t = [A]0 × \(e^{(-kt)}\) = 0.10 × \(e^{(-(0.069330.0 + 0.0346530.0 + 0.017325 * 30.0)}\)) = 0.0471 M

Therefore, the concentration of A at 30.0 min is 0.0471 M.

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The question is -

For the reaction A → products, successive half-lives are observed to be 10.0, 20.0, and 40.0 min for an experiment in which [ A ] 0 = 0.10 M . Calculate the concentration of A at the following times.

a. 80.0 min

b. 30.0 min

The atom's valence electrons experience the greatest effective nuclear charge is the valence electrons in Te. the correct option is 3.

Valence electrons are the electrons that are present in the outer shell of the atoms. These electrons are free electrons to form bonds with the electrons of other atoms.

The element that has fewer valence electrons can easily donate its electron and make the bond with another atom. Its reactivity will be high. If an atom contains many-electron in its outer shell, it will be difficult to donate them.

But if the atom will need just one or two electrons to complete its shell, then its reactivity will be high. Here, the Te will have the greatest effective nuclear charge.

Thus, the correct option is 3. The valence electrons in Te.

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The correct answer to the first part of your question is option (c): Energy is released by water vapor as it condenses.

When water vapor condenses into liquid water, it undergoes a phase change from a gaseous state to a liquid state. During this phase change, energy is released in the form of latent heat. This release of energy occurs because the water molecules in the vapor phase are more energetic and have higher kinetic energy compared to the water molecules in the liquid phase.

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If a scientist adds a chemical that specifically inhibits diffusion of protons out of the thylakoid through the ATP synthase complex, the result would be a decrease in the production of ATP during photosynthesis.

This is because the inhibition of proton diffusion through ATP synthase will disrupt the proton motive force that drives ATP synthesis. As a result, the energy available for the Calvin cycle will be reduced, which can ultimately lead to a decrease in the rate of photosynthesis.

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Answer:

3.6  moles

Explanation: i got that quistion right .

M is equal to (molar mass) (molar volume) (density).

Let's first translate the temperature into Kelvin:

T = 25°C + 273.15 = 298.15 K

The pressure will now be converted to an atm:

760 mm Hg equals 1 atm

Pressure is equal to 740 mm Hg times 760 mm Hg/atm, or 0.9737 atm.

Let's use the ideal gas law equation to determine the molar volume now:

PV = nRT

V is equal to (RT) / P is equal to (0.0821 L atm/mol K) (298.15 K) / (0.9737 atm).

V ≈ 24.93 L/mol

Now, using the provided density, let's get the molar mass:

M = (5.8 g/L) (24.93 L/mol) = (density) (molar volume)

M ≈ 144.394 g/mol

The gas's molar mass is therefore most closely associated with 144.394 g/mol.

The empirical formula for the gas, CH2, reveals the proportional proportion of hydrogen to carbon atoms in the gas. The computed molar mass, however, is considerably more than the molar mass of the empirical formula. This implies that the gas's true molecular composition must have more atoms.

We determine that the ratio is around 3.33 by comparing the molar mass of the empirical formula (14.03 g/mol) to the molar mass of the gas (46.61 g/mol). This suggests that a multiple of the empirical formula makes up the gas' molecular formula.

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The atomic number of Te₂ is 52.

Te₂ refers to a Te atom that has formed a diatomic molecule by sharing two electrons with another Te atom. The atomic number of Te₂ is 52, since the molecule contains two Te atoms with a combined atomic number of 104.

Tellurium is a rare, silvery-white, brittle metalloid that is chemically related to selenium and sulfur. Tellurium is not very abundant in the Earth's crust, with an estimated concentration of only 0.001 parts per million.

Tellurium has a variety of uses in industry and technology, including as a component of alloys used in the production of steel, copper, and lead, as a semiconductor material in electronic devices, and as a coloring agent in ceramics and glass. It is also used in some types of solar cells, as well as in the production of blasting caps and other explosives.

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Answer: Flat. The meniscus will be flat/neutral with no curves if adhesion and cohesion are equal.

The pressure of a gas is the force that the gas exerts on the walls of its container.

Let’s start with the ideal gas law, PV = nRT. In this equation, ‘P’ represents atmospheric pressure, ‘V’ represents volume in liters, ‘n’ represents the number of particles in moles, ‘T’ represents temperature in Kelvin, and ‘R’ represents the ideal gas constant (0.0821 liter atmospheres per moles Kelvin). The force that a gas exerts on the walls of its container is defined as its pressure.

When you blow air into a balloon, it expands because the pressure of air molecules on the interior of the balloon is greater than on the outside. Pressure is a characteristic that governs the direction of mass flow.

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Answer:

The distance between the tank and the upstairs tap is lesser than the distance between the tank and the downstairs tap so water comes out with more force in the downstairs tap than from the upstairs one.

Explanation:

yass

2Li2S + Sn(SO4)2 → 2Li2(SO4) + SnS2 is Balanced chemical equation.

What is Balanced chemical equation?

A balanced chemical equation is a chemical reaction that has equal numbers of moles of chemical substances both in the reactant and the product side.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides.

In a balanced chemical equation, the mass and the change are both equal.

From the missing image that is attached below, we can see that the picture depicts that we have:

The reactant side:

3 molecules of CH₄ and 3 molecules of N₂Cl₄

The product side:

3 molecules of CCl₄, 3 molecules of N₂ and 6 molecules of H₂

Therefore, the balanced chemical equation for the reaction is:

3CH₄ + 3 N₂Cl₄ → 3 CCl₄ + 3N₂ + 6H₂

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Answer:

Transparent Rock Crystal has many electronic uses; it is used as oscillators in radios, watches, and pressure gauges, and in the study of optics. Quartz is also used as an abrasive for sandblasting, grinding glass, and cutting soft stones.

Explanation:

The two forms of oxygen 16 and oxygen 18 are isotopes.

An isotope is a type of atom that has the same number of protons as another atom of the same element but a different number of neutrons. An isotope is identified by the number of neutrons in the nucleus.Both oxygen-16 and oxygen-18 are isotopes of oxygen. Oxygen-16 has eight neutrons and eight protons in its nucleus. Oxygen-18 has ten neutrons and eight protons in its nucleus.

The difference in the number of neutrons between oxygen-16 and oxygen-18 gives them slightly different chemical and physical properties. For example, oxygen-18 is slightly heavier than oxygen-16, and it has a slightly lower boiling point. However, the two isotopes are chemically similar, and they can be used interchangeably in most chemical reactions.

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The binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond.  Option b

Aminoacyl-tRNA is a complex molecule that plays a crucial role in protein synthesis. It consists of a tRNA molecule covalently linked to an amino acid. The amino acid is attached to the 3' end of the tRNA molecule through an ester bond.

An ester bond is formed between the carboxyl group (-COOH) of the amino acid and the hydroxyl group (-OH) of the ribose sugar at the 3' end of the tRNA molecule. This ester bond is also referred to as an ester linkage. The formation of the ester bond is catalyzed by the enzyme aminoacyl-tRNA synthetase.

The ester bond in aminoacyl-tRNA is essential for protein synthesis. During translation, the aminoacyl-tRNA molecule carries the specific amino acid to the ribosome, where it is incorporated into the growing polypeptide chain. The ester bond is later hydrolyzed, releasing the amino acid for further use in protein synthesis.

In summary, the binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond between the carboxyl group of the amino acid and the hydroxyl group of the ribose sugar in the tRNA molecule.

Option b

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Table A: Variation of Temperature

≈ 20°C 24 1,000 0.2 34.2    36

≈ 40C 40 1,000 0.2 26.3   146

≈ 65C 65 1,000 0.2 14.2    190

≈ 5°C 3 1,000 0.2 138.5  352

Table B: Variation of Particle Size

large 1,000 0.2 34.5    145

medium 1,000 0.2 28.9   173

small 1,000 0.2 23.1    216

From Practical perform shown below, It conclude that  If you increase the temperature of a reaction, then the reaction rate will increase because particles experience more collisions at higher temperatures.

The effects of temperature and a reactant’s particle size on reaction rate.

Step 1: Gather Materials250 mL graduated cylinder

Step 2: Measure the Reaction Rate at ≈ 20°C (Room Temperature)

a) Using a graduated cylinder, fill a 250 mL beaker with 200 mL of water.

b) Measure the temperature of the water and record it in the correct row of Table A.

c) Reset the timer. Start the timer as you place a full tablet into the beaker.

d) Record the reaction time on the Data Sheet in the correct row of Table A.

e) Compute the reaction rate to the nearest mg/L/sec. Record it in the last column of Table A.

Step 3: Measure the Reaction Rate at ≈ 40°C Repeat Step 2, heating the water to approximately 40°C using a hot plate during sub-step a.

Step 4: Measure the Reaction Rate at ≈ 65°CRepeat Step 2, heating the water to approximately 65°C using a hot plate during sub-step a.

Step 5: Measure the Reaction Rate at ≈ 5°CRepeat Step 2, chilling the water to approximately 5°C inside an ice bath during sub-step a. (To create an ice bath, place 100 mL of ice and 100 mL of water in a 600 mL beaker of ice water and wait until the temperature reaches approximately 5°C. To save time, you may wish to set up the ice bath, using an additional 250 mL beaker, while working on Step 4.)Variation of Particle Size

Step 6: Measure the Reaction Rate for a Full Tablet

a) Using a graduated cylinder, fill a 250 mL beaker with 200 mL of water.

b) Reset the timer. Start the timer as you place the tablet in the beaker.

c) Record the reaction time on the Data Sheet in the appropriate row of Table B.

d) Compute the reaction rate to the nearest mg/L/sec. Record it in the last column of Table B.

Step 7: Measure the Reaction Rate for a Partially Broken Tablet Repeat Step 6, but this time break the tablet into eight small pieces on a piece of filter paper. Make sure to place all of the pieces into the beaker at the same time.

Step 8: Measure the Reaction Rate for a Crushed Tablet Repeat Step 6, but this time crush the tablet into tiny pieces on a piece of filter paper. Make sure to place all of the pieces into the beaker at the same time.

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At standard temperature, pressure, or STP the volume of 1.00 mole of carbon dioxide is 22.4 L. Option D is the correct answer

According to the Ideal Gas Law,

PV = nRT,

Where :

P = Pressure

V = volume

n = number of moles

R = gas constant

T = temperature in Kelvin.

The volume of one mole of that substance is known as the molar volume. The volume is known as the molar volume of an ideal gas at STP.

At STP (standard temperature and pressure),

P = 1 atm

T = 273 K

R = 0.08206 L atm \(mol^-1 K^-1.\)

n = 1.00

Substuting the values in the Ideal Gas Law equation we get:

PV = nRT

V= n R T / P

V = 1.00 ×  0.08206 ×  273 / 1

V = 22.4 l

Therefore, the molar volume of 1.00 mole of carbon dioxide at STP is 22.4 L.

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Answer:

i) increase

ii) decrease

iii) remain the same

iv) No, because it dissociates completely.

Explanation:

On a 10-fold dilution of a weak acid, the pH will increase because the concentration of hydrogen ions will decrease thereby increasing the pH to close to that of water.

On a 10-fold dilution of a weak base, the pH will decrease due to the removal of hydroxide ions from the solution. This results in the solution having a H closer to that of water.

If one adds a very small amount of strong base to a buffered solution, the pH will remain constant because a buffer solution acts to withstand any change to its pH on the addition of small quantities of either an acid or a base.

A buffer solution cannot be made with a strong acid because thy undergo complete dissociation. Therefore, any small addition of base or acid will result in very large changes in the pH of the solution. A buffer solution is made with a weak acid and its conjugate base or a weak base and its conjugate acid.

Answer:

You should never throw water on an electrical fire because water conducts electricity and you could be electrocuted.

Please mark 4 brainliests

Answer:

hey mateee

Boyle's law :-  the pressure (p) of a given quantity of gas varies inversely with its volume (v) at constant temperature.

Boyle's law can also be formularized as P1V1 = P2V2

Charle's law :-  the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature, if the pressure remains constant.

Charle's law can also be formularized as V1/T1 = V2/T2  

Answer:

I think no b

Explanation:

because in chemistry I have nothing listen

CHF3

Answer:

M=3

B=25

Equation= 3x+25

Explanation:

M is your slope and if you follow the slope- intercept formula (y=m+b) you just need to plug in the numbers.

Thus your answer:

M=3

B=25

Equation= 3x+25

Answer:

Explanation:

The Kudzu is a plant that was introduced to the United States from Japan in the year 1876. In the United States it was introduced as an ornamental plant but with a reason which was to prevent soil erosion. Kudzu was disseminated as being high-protein content used to steer feed as well as a spreading plant to counteract soil erosion.

Answer:

Kudzu was introduced as an ornamental plant.

+

Kudzu was introduced as a way of preventing soil erosion.

So, A and D!

Answer:

A

Explanation:

The letter A is the correct answer

Answer:

net force

Explanation:

The net force acting on an object is the combination of all of the individual forces acting on it. ... If two forces act on an object in the same direction, the net force is the sum of the two forces.

The chemical formula for lead chromate is PbCrO4, which means that for each formula unit of lead chromate, there are one lead atom, one chromium atom, and four oxygen atoms. Thus, there are a total of one lead atom in each formula unit of lead chromate.

Explanation: The chemical formula for lead chromate is PbCrO4. The number of lead atoms present in each formula unit of lead chromate can be determined by analyzing the subscripts in the formula.The subscript of Pb in the formula is 1. This means that each formula unit of lead chromate contains 1 lead atom.Therefore, the number of lead atoms in each formula unit of lead chromate is 1.Lead chromate is a yellow pigment that has been used in many industrial applications. It is often used as a pigment in paints, plastics, and ceramics. It is also used in the production of varnishes, dyes, and pigments.The substance is toxic and carcinogenic. It can cause cancer and other serious health problems if inhaled or ingested. For this reason, the use of lead chromate has been restricted in many countries, and its use is closely monitored in others.Lead chromate is a compound made up of lead, chromium, and oxygen. It is produced by reacting lead nitrate with potassium chromate in the presence of an alkaline solution. The reaction produces lead chromate and potassium nitrate.

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Answer: In science, a hypothesis is a possible explanation for an observation, while a theory is an explanation that is supported by a large body of evidence.

Explanation: exact answer

7.66 x 10⁵ mmol of argon is equal to 7.66 x 10⁵ x 6.022 x 1023 argon atoms. That is the same as 4.62 x 1029 atoms of argon.

To put this in perspective, this is equivalent to the number of grains of sand that would fill more than 10,000 Olympic-sized swimming pools. Since argon is an inert gas, it can be found in the atmosphere, and is often used in a variety of industrial processes.

For example, argon is used to preserve food and to create a protective atmosphere for arc welding and other metalworking processes. It is also used in the production of light bulbs and for the purification of silicon wafers used in the manufacture of computer chips. The sheer amount of argon atoms contained in 7.66 x 10⁵ mmol of argon makes it an incredibly versatile and valuable element.

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The entropy of a system can decrease only if the entropy of the surrounding environment increases by a greater amount. This is a reflection of the second law of thermodynamics. Entropy is a measure of the degree of disorder or randomness in a system.

The higher the entropy, the higher the degree of disorder. In thermodynamics, the entropy of a closed system can never decrease over time. This is known as the second law of thermodynamics, which can be expressed in various ways, including the Clausius inequality, the Kelvin-Planck statement, and the Gibbs entropy formula.

However, in most cases, systems are not completely isolated, and there is an exchange of matter or energy with the surroundings. In such cases, the entropy of the system can decrease if the entropy of the surrounding environment increases by a greater amount. This is because the entropy of the universe, which is the sum of the entropy of the system and the entropy of the surrounding environment, always increases.

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