* Sodium has an atomic number of 11 and a mass number of 23.
Which of the following are the correct number of protons,
neutrons, and electrons, respectively, in a neutral sodium
atom?

Answer:

Time taken = 174 days

Explanation:

Half life is the time take for a subsrtance taken to decay to half of it's origial or initial concentration.

In this probel, the haf life is 87 days, this means that after evry 87 days, the concentration or mass of sulfur-35 decreases by half.

If the starting mass is 1.00g, then we have;

1.00g --> 0.5g (First Half life)

0.5g --> 0.25g (Second half life)

This means that sulphur-335 would undergo two half lives for 0.25g to remain.

Total time taken = Number of half lives  * Half life

Time taken = 2 * 87

Time taken = 174 days

Answer

Lemonade with no pulp will be a homogenous mixture.

Explanation

In chemistry, a mixture is a combination that does not produce a chemical reaction. There are two categories of mixtures: homogeneous and heterogeneous mixtures.

0. Homogeneous mixtures appear uniform to the eye.

1. Heterogeneous mixtures are not uniform, and you can identify visually their components.

Lemonade with no pulp will be a homogenous mixture.

The given statement "production associates are not allowed to view the process safety management documents. They are only for supervisors and upper management" is true.

These documents are typically intended for supervisors and upper management, as they contain information related to the management of hazards and risks associated with specific processes or operations. This is to ensure that the management team has the necessary information to make informed decisions about process safety and to ensure that appropriate safety measures are in place to protect workers and the surrounding community.

Hence, It is important to note that access to PSM documents should be based on an individual's specific job responsibilities and the level of access needed to perform their duties. Some production associates may have access to certain PSM documents if their job responsibilities require it.

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production associates are not allowed to view the process safety management documents.They are only for supervisors and upper management? true or false.

The balanced molecular equation for the reaction between sodium hydroxide (NaOH) and aluminum chloride (\(AlCl_3\)) in aqueous solution can be written as follows: 2NaOH(aq) + 3\(AlCl_3\)(aq) → 3NaCl(aq) + \(Al(OH)_3\)(s)

In this reaction, sodium hydroxide (NaOH) reacts with aluminum chloride (\(AlCl_3\)) to form sodium chloride (NaCl) and aluminum hydroxide (\(Al(OH)_3\)). The coefficients in the balanced equation indicate the stoichiometric ratio between the reactants and products.

The physical states of the substances are indicated by the symbols (aq) for aqueous solutions and (s) for the solid precipitate.

The reaction is a double-displacement reaction, also known as a precipitation reaction. Double-displacement reactions involve the exchange of ions between two compounds, resulting in the formation of a precipitate.

In this case, sodium hydroxide and aluminum chloride react to form sodium chloride and aluminum hydroxide, with aluminum hydroxide being the white solid precipitate.

It's worth noting that the actual reaction might involve hydrated forms of the compounds, such as NaOH·x\(H_2O\) and \(AlCl_3\)·y\(H_2O\). However, for simplicity, these hydrated forms are not included in the balanced equation.

Overall, the balanced equation represents the chemical reaction between sodium hydroxide and aluminum chloride, showing the reactants, products, and their stoichiometric ratios.

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The mass of H2 produced is 0.657 g.

Generally, The balanced equation is:

2 HCl → H2 + Cl2

The molar mass of HCl is 36.5 g/mol (1+35.5).

First, we need to determine the number of moles of HCl:

23.8 g HCl × (1 mol HCl/36.5 g HCl) = 0.651 mol HCl

From the balanced equation, we can see that 2 moles of HCl produce 1 mole of H2:

2 mol HCl → 1 mol H2

So, we can calculate the number of moles of H2 produced:

0.651 mol HCl × (1 mol H2/2 mol HCl) = 0.326 mol H2

Finally, we can use the molar mass of H2 to convert the number of moles of H2 to grams:

0.326 mol H2 × 2.016 g H2/mol = 0.657 g H2

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The term that refers to the passing of a wave through an object is "transmission."

Transmission refers to the process by which a wave passes through an object or medium. In the context of sound, transmission occurs when sound waves travel through different substances, such as air, water, or solids.

When a sound wave encounters an object, it can be transmitted through it, reflected off it, or absorbed by it, depending on the properties of the object and the medium through which the sound is traveling.

For example, when you speak into a microphone, the sound waves produced by your voice travel through the air and are transmitted to the microphone's diaphragm. The diaphragm converts the sound waves into electrical signals, which can then be amplified and reproduced as sound through speakers.

In summary, transmission is the term used to describe the passage of a wave, such as a sound wave, through an object or medium. It is an essential concept in understanding how waves interact with their surroundings and how sound propagates through different materials.

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Answer:

2.0kg

Explanation:

The mass of 7 red apples in kilograms is to be considered as the 1.16 kilograms.

Since the mass of a dozen apples is 2 kg.

we know that

1 dozen is 12 units

So the mass of 12 apples = 2kg

So mass of 1 apple = 2/12 = 1/6  kg

Now the mass of 7 apple is to be  

= 7/6 kg

= 1.16 kg

hence, The mass of 7 red apples in kilograms is to be considered as the 1.16 kilograms.

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Based on the given measurements for the length, width, and height of the box;

The height of the box is determined from the data provided as follows:

length, l = 2.2 in

width, w = 3.5 in

height, h = 10.4 in + 1 in

The height of the box = 10.4 + 1 in

Hence, the height of the box = 11.4 in

The volume of the box is calculated as a product of the length, width, and height of the box as determined from the measurements taken.

The volume of the box, V = l × w × h

where;

l is length = 2.20 in

w is the width = 2.91 in

h is the height = 11.4 in

The volume of the box, V = 2.20 * 2.91 * 11.4

The volume of the box, V = 73.0 in³

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Complete question:

Suppose you are trying to find the volume of a box based on the following measurements for the length, width, and height of the box, where the height was measured in two parts.

length, l = 2.2 in

width, w = 3.5 in

height, h = 10.4 in + 1 in

a. Calculate the height (h) of the box first keeping all digits, then rounding to the proper number of significant figures.

b. Calculate the volume (V) of the box using V = l × w × h. Round to the proper number of significant figures.

The Bohr model will contain 3 orbit around nucleus, first orbit contain 2 electrons, second orbit contain 8 electrons and third orbit contain 1 electrons.

The Bohr model is an explanation of the structure of atoms, particularly hydrogen, presented by the scientist Niels Bohr in 1913. The Bohr model of the atom, which was a major break from previous, classical descriptions, became the first to include quantum theory and was the forerunner of entirely quantum-mechanical model.

The Bohr model and every of its descendants define atomic electron characteristics in terms of a list of permissible (possible) values. The Bohr model will contain 3 orbit around nucleus, first orbit contain 2 electrons, second orbit contain 8 electrons and third orbit contain 1 electrons.

Therefore, the Bohr model will contain 3 orbit around nucleus, first orbit contain 2 electrons, second orbit contain 8 electrons and third orbit contain 1 electrons.

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Answer:

When conducting a chemistry lab experiment using chalk (calcium carbonate) in vinegar (acetic acid), there are several limitations and precautions to be aware of:

Limitations of chalk in vinegar chemistry experiment:

Reaction rate: The reaction between chalk and vinegar is relatively slow, which may require a longer observation period or higher concentration of vinegar to observe significant changes within a reasonable time frame.

Solubility: Chalk may not dissolve completely in vinegar, resulting in incomplete reaction or difficulty in obtaining accurate results.

Product formation: The reaction between chalk and vinegar produces carbon dioxide gas, water, and calcium acetate. The carbon dioxide gas may escape into the atmosphere, leading to loss of product and inaccurate measurements.

pH: Chalk is a basic substance, and the reaction with vinegar, which is acidic, may result in neutralization, leading to a decrease in the overall acidity of the reaction mixture.

Precautions to take in chalk in vinegar chemistry experiment:

Ventilation: The reaction between chalk and vinegar produces carbon dioxide gas, which can displace air and potentially cause asphyxiation in a closed or poorly ventilated area. Conduct the experiment in a well-ventilated area or under a fume hood to ensure adequate air circulation.

Eye and skin protection: Vinegar is an acid and can cause skin and eye irritation. Wear appropriate personal protective equipment (PPE), such as gloves and goggles, to protect yourself from contact with vinegar or any other chemicals used in the experiment.

Chemical handling: Handle the chemicals, including chalk and vinegar, with care, following proper lab safety protocols. Avoid ingestion, inhalation, or direct contact with the chemicals, and dispose of them properly according to local regulations.

Accuracy in measurements: Use calibrated and accurate measuring tools, such as graduated cylinders or burettes, to measure the amount of chalk, vinegar, and other reagents accurately. This will ensure the reliability and accuracy of the experimental results.

Observations: Make careful and detailed observations during the experiment, noting any changes in appearance, gas evolution, or other relevant observations. Take measurements at appropriate intervals and record the data accurately for analysis and interpretation.

It is important to follow good laboratory practices, including proper chemical handling, accurate measurements, and cautious observations, to ensure safe and reliable results in a chalk in vinegar chemistry lab experiment. Consult with a qualified instructor or supervisor for specific guidelines and precautions related to your experiment.

Life will come out to be 10 days. This is the required value of half life.

what is radioactive isotope?

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The partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg (calculated by subtracting the partial pressure of water, 17.0 mm Hg, from the total atmospheric pressure, 750.0 mm Hg).

When a gas is collected over water, the presence of water vapor affects the total pressure observed. In this case, the total atmospheric pressure is given as 750.0 mm Hg, and the partial pressure of water vapor at 19.5°C is 17.0 mm Hg.

To determine the partial pressure of hydrogen, we need to subtract the partial pressure of water vapor from the total atmospheric pressure. Partial pressure refers to the pressure exerted by an individual gas component in a mixture. In this scenario, the collected gas is primarily hydrogen, with water vapor being the other component.

By subtracting the partial pressure of water vapor (17.0 mm Hg) from the total atmospheric pressure (750.0 mm Hg), we can find the partial pressure of hydrogen:

Partial pressure of hydrogen = Total atmospheric pressure - Partial pressure of water vapor

Partial pressure of hydrogen = 750.0 mm Hg - 17.0 mm Hg

Partial pressure of hydrogen = 733.0 mm Hg

Therefore, the partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg.

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Stilbene dibromide includes (1R,2S)-1,2-dibromo-1,2-diphenylethane, (1R,2R)-1,2-dibromo-1,2-diphenylethane, (1S,2S)- It has three stereoisomers. 1,2-dibromo-1,2-diphenylethane.

Bromination of trans-stilbene primarily yields meso-1,2-dibromo-1,2-diphenylethane. Electrophilic bromine addition reaction. Stilbenes can exist as both trans and cis stereoisomers, but they naturally occur predominantly as the trans isomer due to their greater thermodynamic stability compared to the cis isomer.

If a molecule has two stereocenters there should be four possible stereoisomers. If a molecule has 3 stereocenters, there should be up to 8 stereoisomers. Therefore, the maximum number of stereoisomers for a given configuration is 2n. where n is the number of chiral centers.

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173 degrees Celsius is extremely hot and would feel scorching and painful. It is well above the boiling point of water (100 degrees Celsius), so any contact with surfaces at this temperature would cause severe burns.

In more detail, at 173 degrees Celsius, the air would be unbearably hot, making it difficult to breathe. Your skin would feel a burning sensation immediately upon contact with any object or surface heated to this temperature. It would be similar to touching a hot stove or a blazing fire. The intense heat would quickly penetrate your skin, causing deep burns and potentially permanent damage. Extreme caution and protective measures are necessary to avoid such high temperatures, as they pose a significant risk to health and safety. It is important to stay away from such extreme temperatures to prevent serious harm.

In summary, 173 degrees Celsius would feel extremely hot and would cause severe burns upon contact with objects or surfaces at this temperature. The air would be scorching and difficult to breathe, making it essential to avoid exposure to such extreme heat for the sake of personal safety.

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Answer:

K = 5

Explanation:

Distribution coefficient, K, is defined as the ratio between the concentration of a solute in two inmiscible solvents.

K = Concentration in solvent 1 / Concentration in solvent 2

Usually solvent 2 is water.

Replacing with the concentrations in the problem:

K = Concentration in ether / Concentration in water

K = 0.60mg/mL / 0.12mg/mL

Answer:

Increasing the temperature of 1 mol of C8H18(l) requires more energy

Explanation:

To answer this question, we need to define molar heat capacity that is the amount of heat required to increase in 1K the temperature of 1 mole of substance.

That means the substance with higher molar heat requires more energy to increase its temperature

Molar heat of octane, C8H18 is 255.68J/Kmol

Molar heat of water is 75.38J/Kmol

That means increasing the temperature of 1 mol of C8H18(l) requires more energy

Answer:

I don't know sorry I hope you find what you're looking for

Answer:

I think the answer is G

Explanation:

(electron =negetive) (proton=positive) (neutron=neutral)

I think you understand.

Answer:

to the left

Explanation:

If the concentration of products is increased for a reaction that is in equilibrium, the equilibrium would shift to the left side of the reaction (the reactant's side).

For a reaction that is in equilibrium, the reaction is balanced between the reactants and the products. According to Le Cha telier's  principle, if one of the constraints capable of influencing the rate of reactions is applied to such a reaction that is in equilibrium, the equilibrium would shift so as to neutralize the effects created by the constraint.

Hence, in this case, if the concentration of the products of a reaction in equilibrium is increased, the equilibrium would shift in such a way that more reactants are formed so as to annul the effects created by the increase in the concentration of the products. Since reactants are always on the left side of chemical equations, it thus means that the equilibrium would shift to the left.

Answer: C)Deposition (gas to solid)

Explanation: According to the phase diagram, at room temperature (25°C) and 1 atm, the sample is in the gas phase.  As the temperature decreases to 80 K, it falls below the sublimation curve. T he sublimation curve represents the conditions at which a substance can change directly from a solid to a gas or from a gas to a solid without passing through the liquid phase.

Since the sample is in the gas phase at room temperature, cooling it to 80 K would cause it to go through the process of deposition, where the gas particles directly transform into a solid without first becoming a liquid.  This is indicated by the section of the phase diagram below the sublimation curve.

Answer:

b) The mass of your total product is greater than your total reactants

Explanation:

Mass of reactants is 20 and product is 25 which never occurrs in real

a) The balanced chemical equation for the reaction is: 2H₂ + O₂ → 2H₂O

b) the number of moles of O₂ required is approximately 1.004 moles.

c)  approximately 45 liters of H₂ and 22.5 liters of O₂ are needed to obtain 45 liters of H₂O.

a) Balancing the chemical equation:

The balanced chemical equation for the reaction is: 2H₂ + O₂ → 2H₂O

b) Calculating the number of moles of the reactants needed to obtain 45 liters of H₂O:

From the balanced equation, we can see that for every 2 moles of H₂O produced, we need 2 moles of H₂ and 1 mole of O₂. Since the stoichiometry is based on moles, we need to convert the given volume of H2O into moles.

To convert volume to moles, we need to use the ideal gas law, PV = nRT. At standard temperature and pressure (STP), the molar volume of an ideal gas is 22.4 liters.

Given that we have 45 liters of H2O, we can calculate the number of moles as follows:

moles of H₂O = (volume of H₂O) / (molar volume at STP)

            = 45 liters / 22.4 liters/mol

            ≈ 2.008 moles of H₂O

Since the stoichiometry of the reaction is 2 moles of H₂O for every 2 moles of H₂, we need an equal number of moles of H₂. Therefore, the number of moles of H₂ required is also approximately 2.008 moles.

For O₂, since the stoichiometry is 1 mole of O₂ for every 2 moles of H₂O, we need half the number of moles of H₂O. Thus, the number of moles of O₂required is approximately 1.004 moles.

c)  the volume of the reactants:

Since the stoichiometry of the balanced equation is 2 moles of H₂for every 1 mole of O₂ and 2 moles of H₂O, we can deduce the volume of the reactants based on their molar volumes at STP.

For 2.008 moles of H₂, the volume can be calculated as follows:

volume of H₂= (moles of H₂) * (molar volume at STP)

            = 2.008 moles * 22.4 liters/mol

            ≈ 45 liters of H₂

For 1.004 moles of O₂, the volume can be calculated similarly:

volume of O₂= (moles of O₂) * (molar volume at STP)

            = 1.004 moles * 22.4 liters/mol

            ≈ 22.5 liters of O₂

Therefore, approximately 45 liters of H₂and 22.5 liters of O₂ are needed to obtain 45 liters of H₂O

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Taking into account the reaction stoichiometry, 163.67 grams of C  is needed to reduce Al₂O₃ to produce 491 grams of pure aluminum.

In first place, the balanced reaction is:

2 Al₂O₃ + 3 C → 4 Al + 3 CO₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if 108 grams of Al are produced by 36 grams of C, 491 grams of Al are produced by how much mass of C?

mass of C= (491 grams of Al× 36 grams of C)÷ 108 grams of Al

mass of C= 163.67 grams

Finally, 163.67 grams of C is required.

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The answer is False, the paper chromatography experiment will all have the different color in water, acetone and \(HCl\), ammonia, and calcium sulfide.

A method for separating substances based on their differential solubility in the stationary phase and mobile phase is paper chromatography (solvent). The solvent moves across the paper while carrying the amino acids in the paper chromatography method of separating amino acids.

The chemicals that make up the color, the water, and the paper are the causes of the colors' separation. The pigments are the substances that give color to objects. Some colors penetrate the paper longer before adhering to the water because they adhere to water better than others.

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Like charges repel each other, while opposite charges attract each other. This principle is one of the fundamental aspects of electrostatics. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

As the distance between two charged particles decreases, the force between them increases. This is because the closer the particles are, the stronger the electric field they create, leading to a stronger force of interaction.

On the other hand, as the magnitude of the charges decreases, the force between the particles also decreases. This is because the force is directly proportional to the product of the charges. If one or both of the charges are smaller, the force they exert on each other will be weaker.

In summary, according to Coulomb's law, decreasing the distance between charged particles increases the force between them, while decreasing the magnitude of the charges decreases the force. This understanding of the relationship between charge, distance, and force is crucial in explaining the behavior of charged particles and the interactions between them.

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Conjugate base of HCl is \(Cl^{-}\)  and Conjugate acid-base pair is \(H_{3}O ^ {+} \text{ and } H_{2}O\) are the correct statements.

          \(HCl +H_{2}O - > H _{3}O ^{+} + Cl^{-}\)

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The general gas equation, commonly referred to as the ideal gas law, represents the state of a fictitious ideal gas through an equation. Here the mass of helium gas required to pressurize 86 L tank to 201 atm is 2561.8 g.

According to the ideal gas law, the sum of the absolute temperature of the gas and the universal gas constant is equal to the product of the pressure and volume of one gram of an ideal gas.

The ideal gas equation is given as:

PV = nRT

n = PV / RT

56°C = 329 K

n = 201 × 86 / 0.08206 × 329 = 640.45 mol

Molar mass of 'He' = 4.00 g / mol

Mass =  640.45 × 4.00 = 2561.8 g

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