Which physical property is used to be Indentify the ability to dissolve

The number of protons in the element is 33.

From the information provided we can find the relative atomic mass of the element as follows;

RAM = (0.241 × 75.23) + (0.487  × 74.61) + (0.272 × 75.20)

RAM = 18.13 + 36.34 + 20.45

RAM = 74.92  amu

The element with relative atomic mass of 74.92 amu is Arsenic.

The atomic  number of arsenic is 33. This is the number of protons in its nucleus. Therefore, the number of protons in the element is 33.

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The calories lost by 50 g of hot water starting at 90 degrees celsius is 265 cal.

Heat gained by cold water plus heat gained by the calorimeter equals the heat lost by hot water. The negative sign shows that the calorimeter and cold water are gaining heat, while the hot water calories is losing heat.

Water utilized has a mass of 50.0 g and a specific heat of 1.0 cal/g °C. The heat gained in calories will be provided by these figures. Q=m*C*T=50.0 g*1.0 cal/g°C*5.3 °C = 265 cal.

U value x Wall area x Delta T is the formula used to calculate the amount of heat loss via a wall in BTUs. In our illustration, this would be: 07 x 164 x 28

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The molar mass of one propene (C3H6) molecule is approximately 42.08 grams per mole. This value represents the mass of one mole of propene, which contains Avogadro's number (6.022 x 10^23) of individual propene molecules. To calculate the mass of one propene molecule, we divide the molar mass by Avogadro's number.

The molecular formula of propene (C3H6) indicates that it contains three carbon atoms (C) and six hydrogen atoms (H). The atomic masses of carbon and hydrogen are approximately 12.01 g/mol and 1.008 g/mol, respectively.

To determine the molar mass of one propene molecule, we sum up the atomic masses of its constituent atoms:

(3 * 12.01 g/mol) + (6 * 1.008 g/mol) = 36.03 g/mol + 6.048 g/mol = 42.08 g/mol.

Thus, the mass in grams of one propene molecule is approximately 42.08 grams.

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The mass in grams of one propene (\(C_3H_6\)) molecule is approximately 42.078 grams.

What is the atomic mass?

The atomic mass is the mass of an individual atom of an element, typically expressed in atomic mass units (amu) or grams per mole (g/mol). It represents the average mass of the isotopes of that element, taking into account their relative abundances.

To calculate the mass of one propene (\(C_3H_6\)) molecule, we need to sum the atomic masses of the individual atoms in the molecule.

The atomic masses of carbon (C), hydrogen (H), and their respective amounts in propene are:

Carbon (C):

Atomic mass = 12.01 g/mol

Hydrogen (H):

Atomic mass = 1.008 g/mol

The molecular formula of propene (\(C_3H_6\)) indicates that it contains 3 carbon atoms and 6 hydrogen atoms.

Now, let's calculate the mass of one propene molecule:

Mass of propene molecule = (3 × Carbon atomic mass) + (6 × Hydrogen atomic mass)

= (3 × 12.01 g/mol) + (6 × 1.008 g/mol)

= 36.03 g/mol + 6.048 g/mol

= 42.078 g/mol

Therefore, the mass of one propene (\(C_3H_6\)) molecule is approximately 42.078 grams.

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23.88  grams of fe2o3 are formed when 16.7 g of fe reacts completely with excess o2.

According to the synthesis reaction 4Fe + 3O₂ → 2Fe₂O₃, we need to determine how many grams of Fe₂O₃ are formed when 16.7 g of Fe reacts completely with excess O₂.

Step 1: Determine the molar mass of Fe and Fe₂O₃.
Fe: 55.85 g/mol
Fe₂O₃: (2 × 55.85) + (3 × 16.00) = 159.69 g/mol

Step 2: Convert grams of Fe to moles of Fe.
moles of Fe = (16.7 g) / (55.85 g/mol) = 0.299 moles

Step 3: Use the stoichiometry of the reaction to determine moles of Fe₂O₃ produced.
The reaction shows that 4 moles of Fe produce 2 moles of Fe₂O₃. Therefore,
moles of Fe₂O₃ = (0.299 moles Fe) × (2 moles Fe₂O₃ / 4 moles Fe) = 0.1495 moles Fe₂O₃

Step 4: Convert moles of Fe₂O₃ to grams of Fe₂O₃.
grams of Fe₂O₃ = (0.1495 moles) × (159.69 g/mol) = 23.88 g

23.88 g of fe203 is formed.

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Answer:

b. This is a redox reaction in which octane (C8H18) is the reducing agent.

Explanation:

edge 2021 i just did it

The statement which best describes the reaction is:

This is not a redox reaction. It is an example of combustion.

This is a reaction which is accompanied by a change in the oxidation number of the reacting elements

This is a reaction in which a substance burns in air (oxygen) to produce carbon dioxide, CO₂ and water, H₂O

Considering the equation given

2C₈H₁₈ + 25O₂ —> 16CO₂ +18H₂O

we can see that C₈H₁₈ burns in air (oxygen) to produce carbon dioxide, CO₂ and water, H₂O

Thus, we can conclude that the reaction is not redox but an example of combustion reaction

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Answer:

The answer is a chemical change

Explanation:

An acid is a molecule that can donate free \(H^{+}\) ions, thereby lowering the pH of a solution.

Acids are substances that can release hydrogen ions (\(H^{+}\)) when dissolved in water or in an aqueous solution. When an acid donates an H+ ion, it increases the concentration of  \(H^{+}\) ions in the solution, which leads to a decrease in pH. pH is a measure of the acidity or alkalinity of a solution, with lower pH values indicating higher acidity.

Acids can be classified as strong acids or weak acids based on their ability to donate \(H^{+}\) ions. Strong acids completely dissociate in water, releasing a high concentration of \(H^{+}\) ions. Examples of strong acids include hydrochloric acid and sulfuric acid. Weak acids partially dissociate in water, resulting in a lower concentration of \(H^{+}\) ions. Examples of weak acids include acetic acid and citric acid.

When an acid donates an\(H^{+}\) ion, it can react with other substances or molecules, leading to various chemical reactions and changes in the properties of the solution. Acids are widely used in various industries, research, and everyday life, playing important roles in processes such as digestion, chemical synthesis, pH regulation, and more.

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Complete question: What is an acid?

A molecule that can accept free H+ to a solution and increases its pH.

None                                            

A molecule that can donate free H+ and lower its pH.

A molecule that can donate free H+ and increases its pH

A molecule that can accept free H+ to a solution and lower its pH.

Answer: Yes, the image shows that mass is being conserved.

Answer:

Ok, in number 1 you have to write down the characteristics of light listed there in the Venn diagram, and place them in each column.

In number 2, you have to color in the boxes for with the corresponding color. For example, in box R, you would color red, and so on. Then, you have to color the wave of light following your chart on top of it.

In number 3 you have to color the apple red, and color the sun yellow and draw a yellow ray from the sun hitting the apple and then changing into red and bouncing into the eye.

Explanation:

I hope this helps.

Please give Brainly.

Ok I gave you the answer to question 2 and 3, the answer to question 1 is:

cannot be seen is ultraviolet light, can be seen is visible light, higher energy is ultraviolet light, lower energy is visible light, from of electromagnetic energy is both, emitted from the sun is ultraviolet light. :)

Based on the image,  cities are experiencing dry, clear conditions are: KAFM

The US Weather Map uses different colors to represent the various types and amounts of precipitation that a particular region is receiving.  The US Weather Map is a tool used to represent the weather conditions across different regions of the United States. The color blue on the map indicates that the area is experiencing snowfall.

Therefore,  The intensity of the blue color represents the quantity of snowfall, with lighter blue indicating that the area is receiving a lesser amount of snow, and darker blue indicating that the area is getting more snow. Essentially, the colors on the map help to provide an easy-to-understand visual representation of the weather conditions in different regions.

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See text below

12:49 PM Thu Mar 23

US Weather Map

ล 79%

Seattle

K47F

H

Los Angeles

D67

H

Chicago

A 30F

Little Rock 42F

51F New York City Washington D.C. 59F

H®

B65F Charleston

Orlando 70F

New Orleans 68F

14. Which cities are experiencing dry, clear conditions?

*

ENTER THE LETTERS IN ALPHABETICAL ORDER--ALL CAPS

Your answer

This is a required question

Miami *72F

The partial pressure of N₂ is 3.75 atm, the partial pressure of O₂ is 2.50 atm, and the partial pressure of CO₂ is 1.25 atm in the given mixture at 25 °C and a total pressure of 10.0 atm.

To calculate the partial pressure of each gas in the mixture, we can use the concept of Dalton's law of partial pressures. According to this law, the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas.

First, we need to find the mole fraction of each gas in the mixture. The mole fraction of a gas is the ratio of the number of moles of that gas to the total number of moles in the mixture. We can calculate the mole fraction using the following formula:

Mole fraction (X) = Moles of gas / Total moles of all gases

For N₂:

Mole fraction of N₂ (X_N₂) = 3.00 mol / (3.00 mol + 2.00 mol + 1.00 mol) = 0.375

For O₂:

Mole fraction of O₂ (X_O₂) = 2.00 mol / (3.00 mol + 2.00 mol + 1.00 mol) = 0.250

For CO₂:

Mole fraction of CO₂ (X_CO₂) = 1.00 mol / (3.00 mol + 2.00 mol + 1.00 mol) = 0.125

Next, we can use the mole fractions to calculate the partial pressures of each gas. The partial pressure of a gas is equal to the mole fraction of that gas multiplied by the total pressure of the mixture.

Partial pressure of N₂ (P_N₂) = X_N₂ * Total pressure = 0.375 * 10.0 atm = 3.75 atm

Partial pressure of O₂ (P_O₂) = X_O₂ * Total pressure = 0.250 * 10.0 atm = 2.50 atm

Partial pressure of CO₂ (P_CO₂) = X_CO₂ * Total pressure = 0.125 * 10.0 atm = 1.25 atm

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The system must be structured to draw more energy to work.

Moreover, From second law of thermodynamics, The entropy is a thermodynamic property which represents unavailability of the internal energy of the system for conversion into mechanical energy. So, lower entropy is desirable to extract more internal energy as work done.

Entropy is parameter of orderliness. High entropy represents more chaos and low entropy represents more ordered state. So, ​​​​​​The system is orderly.

Structured system is more ordered than uniform system. Thus, structured system has lower entropy than uniform system. So, The system must be structured to draw more energy to work.

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​​​​​

tip

this is just a tip not the true answer but try to add the given number

pH plays a crucial role in cation exchange and mineral retention in soil. Low pH (acidic conditions) increases the release of cations from soil particles, while high pH (alkaline conditions) promotes cation retention and reduces their availability for plants.

The pH of soil affects cation exchange and mineral retention through its influence on the soil's electrical charge and the solubility of minerals. In acidic conditions (low pH), the soil becomes positively charged, which leads to the release of cations from soil particles.

The high concentration of hydrogen ions (H+) displaces cations from the exchange sites on clay particles, allowing them to be leached away or become more available for plant uptake. This increased cation release can result in nutrient deficiencies for plants.

Conversely, in alkaline conditions (high pH), the soil becomes negatively charged. This facilitates the retention of cations on soil particles, reducing their availability for plant uptake.

The elevated concentration of hydroxide ions (OH-) can compete with cations for binding sites on clay minerals and organic matter, effectively immobilizing the cations and decreasing their mobility in the soil.

Therefore, maintaining an optimal pH range for specific crops is essential for promoting cation exchange and mineral availability in the soil. pH management through soil amendments and fertilization practices can help create favorable conditions for nutrient uptake and plant growth.

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The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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The ion that has 26 protons, 28 neutrons, and 24 electrons is Iron (Fe) (option c).

An element can be determined by the number of protons in the nucleus of its atom. The number of protons present in an atom is referred to as the atomic number of the element.

This means that the number of protons in an atom is unique to a specific element.

Iron (Fe) has 26 protons in the nucleus of its atom.

Therefore, an ion with 26 protons is an ion of the element iron (Fe).

Magnesium (Mg) has 12 protons, Chromium (Cr) has 24 protons, Xenon (Xe) has 54 protons and Nickel (Ni) has 28 protons.

Thus, an ion which has 26 protons, 28 neutrons, and 24 electrons  is Fe (option c)

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Answer: is A Radiation is a type of heat transfer that transfer heat by electromagnetic waves. Outside the visual color range, we cannot see it. But sure almost everything is emitting and absorbing radiation right now. This type of heat transfer works in almost every environment, including vacuum.

Explanation: I hoped that helped.

In order  for  electromagnetic radiation to transfer heat the objects must be in in direct physical contact.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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Answer:

The correct answer is C.

Explanation:

To solve this problem, we should first recall possible units for mass and volume.  Mass can be represented with units of grams, kilograms, etc.  Volume has units of cubic meters, cubic centimeters, etc.

Therefore, since we know that density is mass divided by volume, the only answer that makes sense here is C. grams per cubic centimeter (where per signifies that grams are being divided by cubic centimeters).

Hope this helps!

The amino acid most likely to participate in hydrogen bonding with water is Asparagine.

Asparagine has an amide group (–CONH2) as its side chain, which is polar and can form hydrogen bonds with water.

Hydrogen bonds are a type of intermolecular force that occurs when a hydrogen atom of one molecule is attracted to an electronegative atom (usually oxygen or nitrogen) of another molecule.

In water, these hydrogen bonds help to stabilize the molecules and increase its boiling point.

The other amino acid side chains are not likely to form hydrogen bonds with water. Alanine has a methyl group (–CH3), which is non-polar and not able to form hydrogen bonds.

Leucine and valine both have an isopropyl group (–CH(CH3)2), which is also non-polar. Finally, Phenylalanine has a phenyl group (–C6H5), which is slightly polar, but not to the same extent as the amide group of Asparagine.

In conclusion, Asparagine is the amino acid side chain most likely to form hydrogen bonds with water. The other amino acid side chains are not able to form hydrogen bonds due to their non-polar nature.

Hydrogen bonds between Asparagine and water help to stabilize the molecules and increase its boiling point.

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The mass of sodium chloride : 3.5 g

Given

Reaction :

2.5g of sodium sulphate + 4.5g of barium chloride ⇒ 3.5g of barium sulphate + sodium chloride

Required

The mass of sodium chloride

Solution

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

From the reaction :

mass of reactants = 2.5 g + 4.5 g = 7.0 g

mass of products = 3.5 g + mass of sodium chloride

mass of reactants = mass of products

7.0 g = 3.5 g + mass of sodium chloride

mass of sodium chloride = 7 g - 3.5 g =3.5 g

The correct order of the increasing polarity of the analyte functional group isEthers < Esters.

The given statement is "Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters."  The order of polarities of functional groups is the order of their increasing polarity (i.e., less polar to more polar) based on their electron-donating or withdrawing ability from the rest of the molecule.Polarity of analyte: The analyte's polarity is directly proportional to the dipole moment of the functional group, which is associated with a difference in electronegativity between the atoms that make up the functional group.The electronegativity of an element is its ability to attract electrons towards itself. The greater the difference in electronegativity between two atoms, the more polar their bond, and hence the greater the polarity of the molecule.

To find the correct order of the increasing polarity of the analyte functional group, let's first compare the two groups: hydrocarbon ethers and esters. Here, esters have a carbonyl group while ethers have an oxygen atom with two alkyl or aryl groups. The carbonyl group has more electronegative oxygen, which pulls electrons away from the carbon atom, resulting in a polar molecule. On the other hand, ethers have a less polar oxygen atom with two alkyl or aryl groups, making them less polar than esters. Therefore, the correct order of the increasing polarity of the analyte functional group isEthers < Esters.

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The number of moles in a sample of neon containing 8.6 × 10²⁴ atoms is 14.3 moles.

The number of moles in a chemical compound can be calculated by dividing the number of atoms in the substance by Avogadro's number as follows:

no of moles = no of atoms ÷ 6.02 × 10²³

According to this question, there are 8.6 × 10²⁴ atoms in a sample of neon gas. The number of moles in the substance can be calculated as follows:

no of moles = 8.6 × 10²⁴ atoms ÷ 6.02 × 10²³

no of moles = 1.43 × 10¹

no of moles = 14.3 moles

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Answer:

14 moles

Explanation:

The specific exergy of the system is 718 kJ/kg.

Given data:

Mass of Hydrogen (H2) = 3 pounds

Temperature of Hydrogen (H2) = 70 °C

= (70+273.15)

= 343.15 K

Pressure of Hydrogen (H2) = 1.2 MPa

Dead state temperature = 20 °C = (20+273.15) = 293.15 K

Dead state pressure = 101.325 kPa

Properties of hydrogen and water:

Here, we need to calculate the specific exergy of the system by using dead state temperature and pressure.

The specific exergy is defined as the maximum work obtainable when a system is brought to the dead state.

The formula for specific exergy is given as:

Exergy = h - hds

Where,h = specific enthalpy of the system

hds = specific enthalpy of the system at the dead state

We need to first calculate the specific enthalpy of Hydrogen (H2) at 70 °C and 1.2 MPa using the following table:

Hydrogen 70°C, 120k Pa 3162 54.7 4578 11.8

Here, Specific enthalpy of Hydrogen (H2) at 70 °C and 1.2 MPa

(h) = 4578 kJ/kg

Similarly, we need to calculate the specific enthalpy of Hydrogen (H2) at dead state conditions of 20 °C and 101.325 kPa:

Hydrogen 20°C, 101.325 kPa 2650 53.13 3860 11.94

Here,

Specific enthalpy of Hydrogen (H2) at dead state conditions of 20 °C and 101.325 kPa (hds)

= 3860 kJ/kg

Therefore, the specific exergy of the system is:

Exergy = h - hds

Exergy = 4578 - 3860

Exergy = 718 kJ/kg

Therefore, the specific exergy of the system is 718 kJ/kg.

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The number of mole of aluminum chloride, AlCl₃ produced when 5 moles of chlorine gas, Cl₂ reacts is 3.33 moles

2Al(s) + 3Cl₂(g) → 2AlCl₃(s)

From the balanced equation above,

3 moles of Cl₂ reacted to produce 2 moles of AlCl₃.

From the balanced equation above,

3 moles of Cl₂ reacted to produce 2 moles of AlCl₃.

Therefore,

5 moles of Cl₂ will react to = (5 × 2) / 3 = 3.33 moles of AlCl₃.

Thus, 3.33 moles of AlCl₃ were obtained from the reaction.

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Answer:

Number 6

Explanation:

A reflex action is an involuntary action and nearly instantaneous movement in response to a stimulus.

Answer:

2. Nerves helps to send impulses or information from one place to another and it also carries sensory and motor fibres and most however are mixed nerves carrying both sensory and motor fibres.

3.The brain has many functions and the brain has different regions that deals with different functions in the body.

6.Reflex actions are automatic responses to stimuli.They do not involve the conscious (voluntary) or higher centres of the brain and so are also known as involuntary actions.

10.Loop of Henle,Bowman's Capsule, Glomerulus, Proximal Capsule.

13.Urter is part of the reproductive organ in an human being.

14.We should drink enough water and we should not store our urine,we should always empty our bowels when we feel like using the toilet.

15.Water is good for urinary system because it help for easy digestion and for easy work in the system.

12.The urine is stored in the bladder.

11.Kidneys remove nitrogenous wastes and also control the amount of water,salts and acids - the osmoregulatory function.

5.Nerves that carries the sensory fibre and nerves that carries the motor fibre.

1. Brain and the spinal cord or the central nervous system and the peripheral nervous system.

4.They carry informations from one part of the body to another and they also help in the coordination of the body.....

I think some of the answers are correct...Thank you for the questions.....

Natural disaster victims should be provided with 1 to 3 gallons of water per day. So, the correct answer is option a.

Natural disaster victims should be provided with 1 to 3 gallons of water per day. This is because access to clean drinking water is essential for survival and can become limited or contaminated during natural disasters. While some populations may be able to survive without water for short periods of time, it is important to prioritize providing adequate water to disaster victims to prevent dehydration and related health issues. 1 to 3 litres of water should be given to victims of natural disasters each day. This is due to the fact that having access to clean drinking water is crucial for survival and that it may be scarce or tainted in the event of a natural disaster.

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Answer:

True hope this helps

Explanation: