why is an element atomic mass not listed as a whole number on the periodic table ​

The addition of 15 g of salt to a sample of pure water causes its freezing point to be reduced by 1.3°C. On dissolving an additional 15 g of salt into the solution, there would be no additional effect on the freezing point.

As a result, whenever ice and saline water come into touch, the ice melts and releases more liquid water. Additional salt is then released as a result, melting more ice in the process, and so forth. The freezing point of the substance decreases as dissolved salt concentration increases.

Why does salt slow down the freezing process of water?

The blue and red circles in this image represent the sodium chloride ions that are the primary source of this phenomenon. The amount of water molecules that can join with ice molecules is decreased as a result of these charged particles disrupting the molecules' equilibrium. As a result, water freezes more gradually.

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Explanation:

At the upper left is the atomic number, or number of protons. In the middle is the letter symbol for the element (e.g., H). Below is the relative atomic mass, as calculated for the isotopes found naturally on Earth. At the very bottom is the name of the element (e.g., hydrogen).

Answer:

Appearance: Water is a colourless, odourless and tasteless liquid in its natural state. The crystal structure of water is hexagonal.

Density: The density of water is about 1 gm/cc and it varies with temperature in an undefined pattern. In solid state, the density remains close to 0.9gm/cc.

Viscosity: Viscosity is explained by the resistance to deformation at a given rate. In other words, the thickness of the liquid - eg, syrup or water. Viscosity of water is 0.89 cP.

Explanation:

Answer: Ok so the MOLE (mol) is a unit of measurement representing the amount of a substance that contains the same number of atoms as there are molecules in exactly 12 grams of carbon-12 (i.e., 6022X1023).

Explanation: And that's how it goes, I hope you understood it well!

Best regards (Pr. El Haji)

Answer:

See explanation

Explanation:

Temperature is defined as a measure of the average kinetic energy of the molecules of a body.

When a substance is heated, the kinetic energy of its molecules increases as the temperature increases; hence the particles of the substance moves faster with increasing temperature.

When heat is withdrawn from a liquid, the temperature decreases and the average kinetic energy of the molecules decreases. The molecules become less energetic hence the liquid changes into solid

Once chewed and swallowed, the food will be digested and absorbed nutrients, while the rest of the food will be excreted through the body's feces. This digestion process can take about 24-72 hours.

The process of digestion of food in humans can be divided into two types, namely mechanical digestion and chemical (enzymatic) digestion. Mechanical digestion is the process of changing food from a large or coarse form to a smaller or finer form. The process takes place in the mouth with the help of teeth and tongue. The mechanical digestion process also occurs in the stomach with the help of peristaltic motion of the stomach wall, so that food is like being stirred. While the chemical digestion process is the process of converting food substances from complex forms into simpler forms with the help of digestive enzymes.

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Answer:

a

Explanation:

I think a is the answer because when you produce something you transform it's raw materials to a finished good.

I hope this helps

The condensed structural formula for the product of the reaction of 2-butene with water and a strong acid catalyst is shown below ,

First write the condensed structural formula of 2-butene and indicate that it reacts with water. Then write the condensed structural formula of 2-butanol after the reaction arrow to indicate that it is the product. Finally, write the formula for the catalyst above the arrow.

The acid first attack at double bonded carbon of 2-butene and produce stable carbocation then water molecule attack on carbocation followed by deprotonation .

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Answer:

124225.91 g of Na₃PO₄

Explanation:

From the question given above, the following data were obtained:

Number of atoms of Na₃PO₄ = 4.56×10²⁶ atoms

Mass of Na₃PO₄ =?

From Avogadro's hypothesis,

6.02×10²³ atoms = 1 mole of Na₃PO₄

Next, we shall determine the mass of 1 mole of Na₃PO₄. This can be obtained as follow:

1 mole of Na₃PO₄ = (23×3) + 31 + (16×4)

= 69 + 31 + 64

= 164 g

Thus,

6.02×10²³ atoms = 164 g of Na₃PO₄

Finally, we shall determine the mass of Na₃PO₄ that contains 4.56×10²⁶ atoms. This can be obtained as follow:

6.02×10²³ atoms = 164 g of Na₃PO₄

Therefore,

4.56×10²⁶ atoms = (4.56×10²⁶ × 164)/6.02×10²³

4.56×10²⁶ atoms = 124225.91 g of Na₃PO₄

Therefore, 124225.91 g of Na₃PO₄ contains 4.56×10²⁶ atoms

Answer: They usually dissolve in Polar Solvents

Explanation:

Answer: Ionic/ Polar solvents.

Explanation:

• Ionic or polar compounds will dissolve in ionic or polar solvents.

• Water is a universal solvent because it can dissolve both ionic and polar covalent compounds.

The Maxwell distribution of velocities describes the distribution of speeds of gas molecules at a given temperature. It is based on the kinetic theory of gases and provides insights into the behavior of gas molecules.

As the molecular mass of a gas increases, several characteristics of the Maxwell distribution change. Firstly, the spread of speeds widens. This means that the range of velocities observed for heavier gases becomes broader compared to lighter gases. In other words, the distribution of speeds becomes more spread out Secondly, fewer molecules have speeds close to their average speed. The average speed of gas molecules is determined by the temperature, but as the molecular mass increases, the likelihood of individual molecules having speeds very close to the average decreases. This suggests that there is a greater dispersion or variation in the speeds of molecules in heavier gases. Lastly, as the molecular mass increases, a higher proportion of molecules have very high speeds. This means that heavier gas molecules are more likely to exhibit velocities that are significantly higher than the average speed. This trend can be attributed to the increased mass of the molecules, which affects their kinetic energy and consequently their speeds.

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Answer:

true

Explanation:

Part A (Mg: 3s2): Mg can make 2 bonds.
Part B (Cl: 3s23p5): Cl can make 1 bond.
Part C (Al: 3s23p1): Al can make 3 bonds.

In Part A, the electronic configuration of Mg is given as 3s2, which means it has 2 valence electrons. Mg can lose these 2 electrons to achieve a stable noble gas configuration, or it can share both electrons to form a covalent bond. Therefore, Mg can make 2 bonds.

In Part B, the electronic configuration of Cl is given as 3s23p5, which means it has 7 valence electrons. Cl needs to gain 1 electron to achieve a stable noble gas configuration. Therefore, Cl can make 1 bond by sharing an electron with another atom.

In Part C, the electronic configuration of Al is given as 3s23p1, which means it has 3 valence electrons. Al can lose these 3 electrons to achieve a stable noble gas configuration, or it can share all 3 electrons to form covalent bonds. Therefore, Al can make 3 bonds.

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If hydrochloric acid is added to a solution of HF, it will react with the HF to form H3O+ and F- ions. This reaction is a type of acid-base reaction, where the hydrochloric acid acts as the stronger acid and donates a proton to the HF, which acts as the weaker base.

The addition of hydrochloric acid will increase the concentration of H3O+ ions in the solution. This increase in the concentration of H3O+ ions will shift the equilibrium of the HF ionization reaction to the left, leading to a decrease in the percent ionization of HF. This is because the increased concentration of H3O+ ions will make it more difficult for the HF molecules to ionize and release H+ ions into the solution.

Therefore, the correct answer is that the percent ionization of HF will decrease. The Ka for HF will not change, as it is a constant value for a given temperature and is independent of the concentration of H3O+ ions in the solution.

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Answer:

C. The amount of coffee is the same.

Explanation:

Verified

3.99 teaspoons should be administered to a person weighing 220 pounds

The adult dose of a solution is 0.2 mL/kg of body weight to be administered once daily.

If a person weighs 220 pounds, you have to first convert their weight from pounds to kilograms before you can calculate the dosage.

You should be given the conversion factor of 1 teaspoon = 5 milliliters (mL) or 1 mL

= 0.2 teaspoons (tsp).

Using the conversion factor of pounds to kilograms,1 pound = 0.453592 kilograms

220 pounds = 99.7913 kilograms

Dose = 0.2 mL/kg x 99.7913 kg = 19.95826 mL

To convert the dose from milliliters to teaspoons, use the conversion factor of 1 teaspoon = 5 milliliters.

19.95826 mL × 1 tsp / 5 mL = 3.991652 tsp

Therefore, 3.99 teaspoons should be administered to a person weighing 220 pounds, given the adult dose of 0.2 mL/kg of body weight to be administered once daily.

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The formation of a precipitate is possible when the product of the ionic concentrations exceeds the Ksp value. Qis is the reaction quotient, which is the ionic product (IP) in a solution.

To determine whether a precipitate will occur, the reaction quotient (Qis) must be compared to the solubility product constant (Kip). The correct option is (d) Precipitation will not occur because Qis < Kip. The calculations are provided solution below; Qis = [Pb2+] [I–]2Moles of NaI = 0.587 L × 0.00531 mol/L = 0.00313 mol Moles of Pb(NO3)2 = 0.840 L × 0.00536 mol/L = 0.00451 mol[Pb2+] = 0.00451 mol / (0.587 L + 0.840 L) = 0.00327 M[I–] = 0.00313 mol / (0.587 L + 0.840 L) = 0.00226 MQsp = (0.00327 M) × (0.00226 M)2 = 1.72 × 10–8 Kip = 1.4 × 10–8As Qsp is less than Ksp, a precipitate will not form. Therefore, the correct option is (d) Precipitation will not occur because Qis < Ksp.

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The mass of the cube is 396.55 kg.

To find the mass of the cube, we can use the formula:

mass = density × volume

First, we need to find the volume of the cube. The volume of a cube is given by the formula:

volume = edge length^3

Plugging in the given edge length of 36.3 cm, we get:

volume = (36.3 cm)^3

Calculating this, we find:

volume = 48,428.47 cm^3

Since the density is given in kg/m^3, we need to convert the volume to m^3. There are 1,000,000 cm^3 in 1 m^3, so:

volume

= 48,428.47 cm^3 ÷ 1,000,000 cm^3/m^3

= 0.04842847 m^3

Now we can calculate the mass:

mass = 8190 kg/m^3 × 0.04842847 m^3

Calculating this, we find:

mass = 396.55 kg

Therefore, the mass of the cube is 396.55 kg.

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Answer:

a

Explanation:

Answer:

The answer is

B. They all are eukaryotes.

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The number of mole of aluminum acetate, Al(C₂H₃O₂)₃ present in the sample, given that the sample contains 2.5 moles of hydrogen is 0.278 mole

The mole of aluminum acetate, Al(C₂H₃O₂)₃ present in the sample can be obtained as follow:

From the formula of Al(C₂H₃O₂)₃,

9 moles of H are present in 1 mole of Al(C₂H₃O₂)₃

Therefore,

2.5 moles of H will be present in = (2.5 × 1) / 9 = 0.278 mole of Al(C₂H₃O₂)₃

Thus, we can conclude that the mole of aluminum acetate, Al(C₂H₃O₂)₃ present in the sample is 0.278 mole

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Using the change of base rule to find the logarithm to four decimal places. the correct answer is 11.4235.

To find the logarithm of 143.2 using the change of base rule, we can choose any base we prefer. Let's use base 10 and natural logarithm (base e) for this calculation.

First, we'll use the change of base formula, which states that log(base b) x = log(base c) x / log(base c) b. In this case, we'll calculate log(base 10) 143.2.

We'll use the natural logarithm (ln) as our intermediary step. The natural logarithm of 143.2 can be calculated as ln(143.2).

Using a calculator, we find that ln(143.2) is approximately 4.9628.

Next, we need to calculate log(base 10) e, which is the logarithm of e with base 10. Using a calculator, we find log(base 10) e is approximately 0.4343.

Finally, we apply the change of base formula:

log(base 10) 143.2 ≈ ln(143.2) / log(base 10) e
                ≈ 4.9628 / 0.4343
                ≈ 11.4235

Rounding to four decimal places, the logarithm of 143.2 using base 10 is approximately 11.4235.

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The function of a power source in an electric circuit is to  provide a steady flow of electrons.

An electric circuit comprises of individual electronic components like resistors, diodes,transistors , capacitors,etc. which are connected to each other by means of wires through which electric current flows.It can also be referred to as an electronic circuit.

It usually comprises of at least one active component . The combination of wires and simple and complex components allows operations to be performed, amplification of signals, displacement of data and performing of computations.

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Answer:  a steady flow of electrons

Explanation:

Answer:

5.004

Explanation:

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sorry in a hurry

Answer: 0.6

Explanation:Yes

Autumn needs to look out for seizures in Bailey, the shaggy border collie, as it has been informed by Bailey's owners that Bailey has epilepsy and may require medication.

What is Seizures?

Seizures, also known as convulsions or fits, are sudden, abnormal, and excessive electrical discharges in the brain that can cause changes in behavior, sensation, and consciousness. Seizures can affect people of all ages and can occur due to various factors, such as genetic predisposition, brain injury, infections, metabolic disorders, drug and alcohol abuse, and withdrawal from certain medications.

Seizures are a common symptom of epilepsy, which is a neurological disorder that can cause abnormal electrical activity in the brain leading to seizures. During seizures, dogs may experience sudden and uncontrolled convulsions, loss of consciousness, and involuntary movements of limbs. Therefore, it is important for Autumn to be aware of these symptoms and take appropriate measures to ensure Bailey's safety and well-being.

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Yes, Iron reacts with O2 to give an iron oxide.

When iron comes in contact with oxygen in presence of water it gives ferric oxide, Also known as rust is formed.

The balanced chemical reaction of above is given as follows,

4Fe + 3O2 + x. H2O → 2Fe2O3.xH2O.

A redox commerce between oxygen and iron in a water-rich terrain, similar as largely sticky air, results in the conformation of rust. The rusting of iron is characterised by the conformation of a subcaste of a red, short substance that readily breaks into greasepaint. The rusting process can be stopped or braked down with a fleece of oil painting. A high- quality makeup will also help to decelerate down rusting by keeping humidity from getting to the essence.

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Answer:

the answer is A

Explanation:

i took the test on edg.                  sorry it is so late:(

Answer:A

Explanation: