Please help me ..If you don't have a question or something to say just comment don't steal my points . It's not fair. Here are the questions:

Ascorbic acid is a diprotic acid, which means it can donate two protons (H+ ions) in an acid-base reaction. The student will need to add 12.68 mL of the 0.0700 M NaOH solution to reach the final equivalence point.

Ascorbic acid is a diprotic acid, which means it can donate two protons (H+ ions) in an acid-base reaction. To determine the volume of NaOH solution needed for neutralization, we need to calculate the number of moles of ascorbic acid and then use stoichiometry to find the corresponding moles of NaOH.

Given that the student weighed out 0.209 g of ascorbic acid, we can convert this mass to moles using the molar mass of ascorbic acid. The molar mass of ascorbic acid (C6H8O6) is 176.12 g/mol, so the number of moles of ascorbic acid is:

0.209 g / 176.12 g/mol = 0.001186 mol

Since ascorbic acid is diprotic, it will require twice the amount of NaOH to neutralize both protons. Therefore, the number of moles of NaOH needed is:

2 * 0.001186 mol = 0.002372 mol

To calculate the volume of NaOH solution needed, we can use the molarity (0.0700 M) and the number of moles of NaOH:

Volume of NaOH solution = (0.002372 mol) / (0.0700 mol/L) = 0.03389 L = 33.89 mL

Rounding to the correct number of significant digits, the student will need to add approximately 12.68 mL of the 0.0700 M NaOH solution to reach the final equivalence point.

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Explanation:

Let compound X be 100g.

Molar mass of carbon = 12g/mol

Moles of C in compound X = 54.54/12 = 4.54mol.

Molar mass of hydrogen = 1g/mol

Moles of H in compound X = 9.09/1 = 9.09mol.

Molar mass of oxygen = 16g/mol

Moles of O in compound X = 36.37/16 = 2.27mol

Ratio of C:H:O = 4.54:9.09:2.27 = 2:4:1.

Hence, the empirical formula of X is C2H4O.

A compound X contains carbon, hydrogen and oxygen only X contains 54.54% of carbon by mass, 9.09% of hydrogen by mass and 36.37% of oxygen by mass therefore, the empirical formula of X is C₂H₄O.

The term empirical formula is defined as the formula of a chemical compound is the simplest whole number ratio of atoms present in a compound. CH₄ is the empirical formula of methane compound.

Given that compound X  is 100g.

Molar mass of carbon is 12g/mol

Moles of Carbon in compound X

= 54.54 / 12

= 4.54mol.

Molar mass of hydrogen is 1g/mol

Moles of Hydrogen in compound X

= 9.09 / 1

= 9.09mol.

Molar mass of oxygen is 16g/mol

Moles of Oxygen in compound X

= 36.37 / 16

= 2.27mol

Ratio of C:H:O

= 4.54:9.09:2.27

= 2:4:1.

Hence, the empirical formula of X is C₂H₄O.

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A crystal of halite weighing 5.73 g contains approximately 0.0981 moles of NaCl.

To calculate the number of moles of NaCl in a crystal of halite (table salt) weighing 5.73 g, you need to use the molar mass of NaCl. The molar mass of NaCl is 58.44 g/mol (22.99 g/mol for sodium + 35.45 g/mol for chlorine).

Calculate the moles of NaCl using the formula: Moles = Mass / Molar mass.

Moles = 5.73 g / 58.44 g/mol

          = 0.0981 mol (rounded to four decimal places).

Therefore, there are approximately 0.0981 moles of NaCl in a crystal of halite weighing 5.73 g.

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Akera's sample is not random because he is only surveying every fifth tennis player, which introduces bias into the sample.

Akera's sample is not random. The sampling method he employed, which is surveying every fifth tennis player entering the court, is a form of systematic sampling. In systematic sampling, the researcher selects every nth individual from a population to create the sample.

While systematic sampling can be a useful sampling technique in certain cases, it is not considered random because it introduces a systematic pattern into the selection process. This pattern could potentially introduce bias into the sample by excluding certain types of tennis players or favoring others.

For example, if there is a pattern or clustering in the characteristics or behaviors of tennis players as they enter the court, Akera's sampling method may systematically over or underrepresent certain groups of players. If, for instance, there is a tendency for more experienced players to arrive early and less experienced players to arrive later, Akera's sample may not be representative of the entire population of tennis players at the athletic center.

To achieve a random sample, Akera would need to use a different sampling method, such as simple random sampling, where each member of the population has an equal chance of being selected. This would help ensure that the sample is more representative and reduces the potential for bias in the research findings.

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The question is incomplete, the complete question is;

As Danny was pouring cereal for his breakfast, he noticed that the cereal box says that the cereal contains 5 milligrams of iron per serving. Danny decided to perform an experiment to test this claim. He found that the cereal contains 4.6 milligrams of iron per serving. Based on Danny's measurement, the value reported on the label is ( CORRECT OR INCCORECT) because A: (IT IS DIFFERENT FROM THE VALUE DANNY MEASURED) B: (IT IS REORTED TO THE NEAREST MILLIGRAM) C: (IT USES THE SAME UNITS THAT DANNY USED).

Answer:

CORRECT because IT IS REORTED TO THE NEAREST MILLIGRAM

Explanation:

In mathematics, values may be rounded up or down as required. In the case of this measurement of cereals by Danny, it is customary to measure the amount of iron per serving to the nearest milligram.

As such, even though Danny found out that the actual amount of iron per serving in the cereal is 4.6 milligrams, the value reported on the cereal box is still correct because it was reported to the nearest milligram hence the value had to be rounded up.

Answer:The answer is number 4 aka 7

Explanation:

Recrystalization will occur.The solution may become too diluted for crystals to form if you add too much solvent. Impurities will be captured by a hastily formed crystal's lattice. The crystals that result will also be smaller.

Recrystallization is a physical process used to separate compounds based on how soluble they are. Heating the material to dissolve the compound with impurities in a mixture of a suitable solvent completes the procedure. We can remove the desired chemical or contaminants from the mixture using this method.

The solution may become too diluted for crystals to form if you add too much solvent. The flask needs to be gently cooled, first at room temperature and then in cold water. Impurities will be captured by a hastily formed crystal's lattice. The resulting crystals will also be smaller.

The three main types of recrystallization are;

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Pull to the nearest edge of the road and stop until the emergency vehicle has passed. This is the correct and legal way to handle an emergency vehicle with sirens and flashing lights reaction approaching you.

The correct answer is,  C:

It is important to do so in a timely manner to allow the emergency vehicle to pass as quickly as possible. Explanation: When you hear sirens and/or see flashing lights from an emergency vehicle, it is crucial to remain calm and avoid panicking. Your first instinct may be to speed up or pull over abruptly, but this can be dangerous for both yourself and the emergency vehicle. Instead, pull over to the nearest edge of the road and come to a complete stop until the vehicle has passed. This allows the emergency vehicle to safely navigate through traffic and reach its destination as quickly as possible. It is important to always follow the instructions of emergency responders and give them the right of way on the road.

It is essential to give the right of way to emergency vehicles to ensure their swift and safe passage. Speeding up or stopping suddenly may cause accidents and impede their progress. Instead, pulling over to the nearest edge of the road and stopping allows the emergency vehicle to pass safely and quickly.

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Answer:

Cu₂O

Explanation:

Copper(I) oxide or cuprous oxide is the inorganic compound with the formula Cu₂O. It is one of the principal oxides of copper, the other being or copper (II) oxide or cupric oxide. This red-coloured solid is a component of some antifouling paints.

Transverse waves will be made across the top of the gelatin if you jump up and down.

Transverse waves are waves that oscillate along routes that are perpendicular to the direction in which the wave is moving forward. Examples of transverse waves include electromagnetic waves, seismic S waves, and water surface ripples. Particles in a transverse wave oscillate up and down about their mean location rather than following the wave's path of transmission.

A transverse wave is one in which each particle of the medium moves around its mean location in a direction that is the opposite of the direction in which the wave is propagating. Transverse waves are what makeup light. Only solids and the surface of liquids may generate transverse waves. They are unable to be created inside liquids or gases.

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Adding 1530 cal of heat to 60.0 g of benzene results in a final temperature of approximately 86.4°C.

To calculate the final temperature of benzene after adding heat, we can use the equation:

q = m * c * ΔT

where q is the heat added, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.

Rearranging the equation, we can solve for ΔT:

ΔT = q / (m * c)

ΔT = 1530 cal / (60.0 g * 0.42 cal/g·°C)

ΔT ≈ 61.4°C

To find the final temperature (T₂), we add ΔT to the initial temperature:

T₂ = T₁ + ΔT

T₂ = 25°C + 61.4°C

T₂ ≈ 86.4°C

Therefore, the final temperature of the benzene would be approximately 86.4°C after adding 1530 cal of heat.

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Answer:

An atom of an element always contain three fundamental particles called electrons(e-) , neutron ( n zero) and protons ( p+)

An atom of an element always contains a proton, electron and neutron.

Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus. Only the most common type of hydrogen is neutron-free. Every solid, liquid, gas, and plasma is made up of atoms that are either neutral or ionized.

But when it comes to the word atom, we must go back to 400 B.C. Greece. And Democritus, a brilliant philosopher, proposed the Greek word atomos, which means uncuttable.

Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus.

Thus, An atom of an element always contains a proton, electron and neutron.

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Answer:

For anyone that still needs the answer it's:

2.) Inspect the Bunsen burner and gas tubing for damage.

3.) Move her lab notebook and papers so they are away from the burner.

Explanation:

2 and 3 is right on edge

Bunsen burners are the laboratory equipment used in experiments. Maria should inspect the burner and move her papers and book away before burning. Thus, options b and c are correct.

Bunsen burners are the equipment used in laboratories for heating and sterilizing processes. It is a device used to produce flames using atmospheric oxygen gas and fuel in the burner.

While using the bunsen burner, laboratory safety procedures should be practiced to ensure the safety of the person as well as the working place. Before igniting the burner should be inspected and checked for any leakages.

The notebooks and papers must be placed away from eh burner to avoid any fire accidents as they are easily flammable and can catch fire.

Therefore, options b and c. gas tubing must be inspected before lighting the burner.

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Answer:

A). half, higher

Explanation:

The Formal charge is elaborated as the 'allocated charge to a molecules' atom' on the basis of the assumption that the electrons present in the chemical bond are equally split among the atoms. It is estimated by 'halving the no. of bonding electrons that encircle the atom.

While Oxidation number is characterized as the 'hypothetical charge of an atom that is present within a molecule.' It is also defined as 'the actual number of lost or gained electrons or the rate at which the electrons are gained or lost by an atom to develop a chemical bond along with the other atom.' It is calculated by allocating or sharing the electrons having the higher electronegativity belonging to a specific bond with the other. Thus, option A is the correct answer.

Answer: ur mom

Explanation:

u don’t know she could be hot

Answer:

In this reaction, nitrogen acts as the oxidizing agent. Mg is a reducing agent.

In Part 1 of the question, we are asked to draw the product that results from the provided mechanism arrows. This involves analyzing the reaction steps and understanding the changes that occur during the reaction.

In Part 2, we need to determine whether the elementary step is reversible, meaning if the reaction can proceed in both the forward and reverse directions.

In Part 1, drawing the product resulting from the provided mechanism arrows requires a careful analysis of the reaction steps. The mechanism arrows indicate the movement of electrons and the formation or breaking of bonds. By following the arrows and considering the reactivity of the reactants, we can determine the resulting product(s) of the reaction. It is important to pay attention to the regioselectivity and stereochemistry of the reaction, if applicable.

In Part 2, determining whether the elementary step is reversible involves considering the nature of the reaction and the thermodynamics of the process. Reversible elementary steps involve both forward and reverse reactions occurring under certain conditions. Factors such as energy barriers, equilibrium constants, and reaction conditions influence reversibility. By analyzing these factors, we can determine whether the elementary step is reversible or if the reaction predominantly proceeds in one direction.

Overall, these two parts require a detailed understanding of the reaction mechanism, electron movement, and the factors affecting reversibility to accurately draw the product and determine the reversibility of the elementary step.

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In Part 1, draw the product that results from the mechanism arrows provided. In Part 2, indicate whether the elementary step is reversible. LCH3 4th attempt

Answer:

1. at least two charged interacting parts

2. from the electric fields of charged subatomic particles

3 an arrow released from the bow

4Electrical fields of charged particles interact, bonding those with opposite charges.

5 the interaction of the electric fields of protons and electrons

6 The energy stored in the system increases.

7 Kinetic energy increases because the magnets move in the direction of the field.

8 Iron pieces accelerate toward the magnet, and the energy stored in the system decreases.

9  

The energy stored in the field decreases because the magnet moves in the direction of the field.

10 The energy stored increases and then decreases.

11 The wire was not connected to the source.

12  The electromagnet will become more powerful.

From the electric fields of charged subatomic particles, at least two charged interacting pieces, an arrow launched from the bow, Interaction between electrical fields of charged particles bonds those with opposing charges, the interaction between the protons' and electrons' electric fields.

An electric field is a physical field that surrounds electrically charged particles and acts as an attractor or repellent to all other charged particles in the vicinity. It can also refer to a system of charged particles' physical field.

The area of space surrounding an electrically charged particle or object in which the charge body perceives force is known as the electric field. Examples: -Charges and their arrangements, such as capacitors and battery cells, produce electric fields.

We can produce current flow by applying the pushing force required by electric fields. A circuit's electric field resembles an electron pump in that it is a sizable source of negative charges that can drive electrons.

Thus, From the electric fields of charged subatomic particles, at least two charged interacting pieces.

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Answer:

KBr

Explanation

KBr is an ionic compound which have very high BP since they exist as 3D crystals

Methyl Bromide, CH3Br.  is a covalent compound which have low BP since they exist as individual molecules

Answer:

It has protons, neutrons and electrons

Answer:

the answer is radiation

In the above intermediate chemical equation, oxygen will appear as follows: O₂(g) as a reactant (option B).

A chemical equation in chemistry is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

According to this question, an intermediate chemical equation is presented as follows:

As observed in the above chemical equation, oxygen will react in its gaseous form i.e. as a reactant.

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Answer:

PET (Polyethylene Terephthalate): This is the most common form of polyester and is used in many applications, such as in clothing, packaging, and bottles.

PCDT (Poly-1, 4-cyclohexylene-dimethylene terephthalate): This type of polyester is known for its high strength and is used in industrial applications, such as for making conveyor belts, hoses, and cables.

PTT (Polytrimethylene Terephthalate): This is a newer form of polyester that is made using bio-based materials. It is used in clothing, carpeting, and other textile applications.

PBT (Polybutylene Terephthalate): This type of polyester is known for its toughness and is used in electrical and automotive applications, such as for making connectors, switches, and housings.

Thermoplastic Polyester Elastomers (TPEE): These are polyester-based materials that have both thermoplastic and elastomeric properties. They are used in applications such as automotive parts, consumer goods, and sporting equipment.

Answer:

The first one is Propane

The second one is HEPTANE

The third one is octane

The 4th is butane

the 5th is decane

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

The images has been the representation of the ball and stick structure of the compounds. The central balls have been the representation of the carbon atom , with small balls attached to the sticks have been the representation of the hydrogen attached.

The following structures has been given as:

The structures have been named according to IUPAC as \(\rm C_3H_8\) Propane, \(\rm C_7H_{16}\) Heptane, \(\rm C_8H_{18}\) Octane, \(\rm C_4H_{10}\) Butane, and \(\rm C_{10}H_{22}\) Decane.

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There are approximately 0.38133 moles of nitrogen in the sample of epinephrine. Epinephrine is both a neurotransmitter and a hormone, but it acts mainly as a hormone. Epinephrine, also known as adrenaline, plays an important role in your body's fight-or-flight response. It's also used as a medication to treat many life-threatening conditions

To determine the number of moles of nitrogen in the sample of epinephrine, we need the molar ratio between carbon and nitrogen in the compound. Without this information, we cannot provide a direct answer. The molar ratio can be obtained from the chemical formula of epinephrine (C9H13NO3), which indicates that there is 1 nitrogen atom for every 9 carbon atoms.

Using this information, we can set up a proportion:

(Number of moles of nitrogen) / (Number of moles of carbon) = (Number of nitrogen atoms) / (Number of carbon atoms)

Since we know the number of moles of carbon is 3.432, we can solve for the number of moles of nitrogen:

(Number of moles of nitrogen) / 3.432 = 1/9

Cross-multiplying, we get:

(Number of moles of nitrogen) = (3.432 * 1) / 9

Calculating the result:

(Number of moles of nitrogen) = 0.38133 moles

Therefore, there are approximately 0.38133 moles of nitrogen in the sample of epinephrine.

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Answer:

D Earth's hot interior

Explanation:

The internal heat engine of the earth is the energy source that powers plate movement.

The sun drives the surface process and provides energy for the external heat engine

Therefore, the heat is used to melt rocks and set up convection currents that drives plate movements.

Answer:

volume

Explanation:

The weak acids are HNO₂ and HF. Option D is correct.

HNO₂ (nitrous acid) and HF (hydrofluoric acid) are considered weak acids because they only partially dissociate in water, resulting in a relatively low concentration of H⁺ ions in solution. On the other hand, HNO₃ (nitric acid) and H₂PO₄⁻ (dihydrogen phosphate) are strong acids, which fully dissociate in water, producing a high concentration of H⁺ ions.

On the other hand, HNO₃ (nitric acid) and H₂PO₄⁻ (dihydrogen phosphate) are both strong acids;

HNO₃ is a strong acid that fully dissociates in water, resulting in a high concentration of H⁺ ions.

H₂PO₄⁻ is a weak acid in its conjugate acid form (dihydrogen phosphate), but as H₂PO₄⁻, it acts as a weak base rather than a weak acid.

Hence, D. is the correct option.

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Answer:

Why does D-block start on the fourth row of the periodic table?

Explanation:

The require more energy to reach 3d than 4s, and they fill up 4p before 4d, and so forth. ... The energy is lower for 6s than 4f, and 4f and 5f are lower in energy than the final D level.