The isotope of carbon used in archaeological dating is 14^6C . How many protons, neutrons, and electrons does an atom of 14^6C have?

The viscosity, which affects the amount of friction between water molecules, also plays a role. Despite the low viscosity of water, friction is still a problem. All moving fluids constantly lose energy as a result of rubbing against their surroundings. Water will move from high-energy regions to low-energy ones.

When it comes to confined aquifers, the situation becomes much more complicated, but we still need to understand how they function because they are significant water sources. demonstrates that even if the geological materials at the surface have very low permeability, there is always a water table. This aquifer will have its own "water table," which is actually called a potentiometric surface because it is a measure of the total potential energy of the water, wherever there is a confined aquifer, which is one that is separated from the surface by a confining layer. The potentiometric surface for the confined aquifer  as a red dashed line. It represents the total energy that the water is under. inside the restricted aquifer. The water will rise to the water table if we drill a well into the unconfined aquifer. But if we drill a well into the confined aquifer through both the confining layer and the unconfined aquifer, the water will rise to the level of the potentiometric surface above the top of the confined aquifer. Due to the fact that the water rises above the aquifer's surface, this is referred to as an artesian well.

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The mass percent of the sodium chloride in the saline solution is approximately 1.33%. The molar concentration of the saline solution is approximately 0.229 M.

To determine the mass percent and molar concentration of the saline solution, we need to analyze the mass of the sodium chloride residue and the initial mass of the sample.

Mass percent:

The mass percent is calculated by dividing the mass of the sodium chloride residue by the initial mass of the sample and then multiplying by 100%.

Mass percent = (Mass of NaCl / Initial mass of sample) × 100%

Mass of NaCl = 0.669 g

Initial mass of sample = 50.320 g

Mass percent = (0.669 g / 50.320 g) × 100% ≈ 1.33%

The mass percent of the sodium chloride in the saline solution is approximately 1.33%.

Molar concentration:

To calculate the molar concentration of the saline solution, we need to determine the number of moles of sodium chloride and the volume of the solution.

Moles of NaCl = Mass of NaCl / Molar mass of NaCl

The molar mass of NaCl is 58.44 g/mol.

Moles of NaCl = 0.669 g / 58.44 g/mol ≈ 0.01144 mol

Since the volume of the sample is given as 50.0 mL, we need to convert it to liters.

Volume of solution = 50.0 mL = 50.0 mL × (1 L / 1000 mL) = 0.0500 L

Now we can calculate the molar concentration (Molarity) using the formula:

Molarity (M) = Moles of solute / Volume of solution (in liters)

Molarity = 0.01144 mol / 0.0500 L ≈ 0.229 M

The molar concentration of the saline solution is approximately 0.229 M.

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Answer:

Conjugate acid- H2SeO4

Conjugate base- H2O

Explanation:

The full equation of the reaction is; H2SeO4(aq) + H2O(aq)-->H3O^+( aq) + HSeO4^-(aq).

The conjugate acid is the specie that donates a proton to the conjugate base, hence H2SeO4 is the conjugate acid while H2O is the conjugate base because it accepts a proton from H2SeO4, hence the answer above.

Answer:

256 cm

Explanation:

(2x8)×16

16×16

256

Answer:

256

Explanation:

2x8=16x16=256

The yield of aluminium obtained from 1 m^3 of bauxite is 419810 g

A percent yield of a substance measures the amount of the substance actually obtained as a percentage ratio of expected yield.

Percent yield = actual yield / expected yield × 100%

From the data given:

40 % of the bauxite is converted to aluminium oxide.

Volume of bauxite = 1 m^3

40 % of 1 m^3 = 0.4 m^3

volume of aluminium oxide = 0.4 m^3

density of aluminium oxide = 3965 kg/m^3

mass of aluminium oxide = 0.4 × 3965 kg

mass of aluminium oxide = 1586 kg

Formula of aluminium oxide is Al203

molar mass of aluminium oxide = 102 g

Percentage mass of aluminium in aluminium oxide = 54/102 × 100

Percentage mass of aluminium in aluminium oxide = 52.94 %

Expected mass of aluminium from aluminium oxide = 52.94 × 1586

Expected mass of aluminium = 839.62 kg

Actual yield = 40 % × 839.62

Actual yield of aluminium = 419.81 kg

mass of aluminium in grams = 419810 g

Therefore, mass of aluminium obtained from 1 m^3 of bauxite is 419810 g

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Answer:

5

Explanation:

Edge

Answer:

5

Explanation:

The mass of water that can form is  0.946 g

The balanced chemical equation for the reaction between hydrogen and oxygen to form water is:

2H2 + O2 -> 2H2O

From the equation, we can see that 2 moles of hydrogen react with 1 mole of oxygen to form 2 moles of water. Therefore, the limiting reactant in this problem is oxygen, because it is present in a smaller quantity than hydrogen.

The number of moles of oxygen present in the container is given as 0.0263 mol. According to the stoichiometry of the balanced equation, this quantity of oxygen can react with 2 x 0.0263 = 0.0526 moles of hydrogen to form 2 x 0.0263 = 0.0526 moles of water.

The molar mass of water (H2O) is 18.015 g/mol. Therefore, the mass of water formed can be calculated as:

mass = number of moles x molar mass

mass = 0.0526 mol x 18.015 g/mol

mass = 0.946 g

Therefore, the mass of water that can form is approximately 0.946 g using stoichiometry of balanced equation'

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Answer:So, one mole of water has a mass of 16 +1+1 = 18 grams. So, if one mole has a mass of 18 grams, 25 grams would have a mass of 25 grams/ 18 grams per mole or 1.39 moles

Answer:

The answer would be 1.33

Explanation:

do you need an explanation?

Answer:

\(atoms=1.2x10^{24}atomsSi\)

Explanation:

Hello there!

In this case, by considering the mass-mole-particles relationships, it is possible to compute the atoms of silicon by firstly computing the moles via its atomic mass (28.1 g/mol):

\(mol=56gSi*\frac{1molSi}{28.1gSi} =2.0molSi\)

Next, via the Avogadro's number, we can compute the atoms of silicon:

\(atoms=2.0gSi*\frac{6.022x10^{23}atomsSi}{1molSi}\\\\atoms=1.2x10^{24}atomsSi\)

Best regards!

Answer:

hope this helped

Explanation:

Radiant energy is created through electromagnetic waves and was discovered in 1885 by Sir William Crookes. Fields in which this terminology is most often used are telecommunications, heating, radiometry, lighting, and in terms of energy created from the sun.

Answer:

radiation energy is created through electromagneic waves and was discovered in 1885 by Sir William Crookes

Explanation:

The pH of the solution is approximately 9.13.

The mixture is a buffer solution because it comprises acetic acid, a weak acid, and the conjugate base, acetate ion. The pH of the buffer solution can be determined using the Henderson-Hasselbalch equation:

\(pH = pKa + log([A^-]/[HA])\)

where [A-] is the concentration of the acetate ion (measured by the dissociation of sodium acetate), [HA] is the concentration of acetic acid, and [pKa] is the acid dissociation constant of acetic acid (1.75 x 10^-5).

The concentration of the acetate ion ([A-]) in the solution must first be determined. The concentration of sodium acetate can be estimated as follows since 2.05 g of sodium acetate dissolve in 92.00 mL of solution:

molar mass of \(NaCH_3COO\) = 82.03 g/mol

moles of \(NaCH_3COO\) = 2.05 g / 82.03 g/mol = 0.0250 mol

concentration of \(NaCH_3COO\) = 0.0250 mol / 0.09200 L = 0.271 mol/L

Due to the complete dissociation of sodium acetate in water, the acetate ion concentration is also 0.271 mol/L.

The amount of acetic acid ([HA]) in the solution must then be determined. Since acetic acid has an initial concentration of 0.25 M, part of it will interact with the acetate ion to produce more sodium acetate. The following illustrates the reaction:

\(CH_3COOH(aq) + CH_3COO^-(aq) = CH_3COO^-Na^+(aq) + H_2O(l)\)

The equilibrium constant for this reaction is:

\(Ka = [CH_3COO^-Na^+][H_2O] / [CH_3COOH(aq)][CH_3COO^-(aq)]\)

Since water is a solvent, its concentration remains essentially constant, and we can write:

\(Ka = [CH_3COO^-Na^+] / [CH_3COOH(aq)][CH_3COO^-(aq)]\)

Solving for [\(CH_3COOH\)(aq)], we get:

\([CH_3COOH(aq)] = [CH_3COO^-Na^+] / (Ka[CH_3COO^-(aq)])\)

\([CH_3COOH(aq)] = (0.271 mol/L) / (1.75 * 10^{-5})(0.271 mol/L)\)

\([CH_3COOH(aq)] = 15.5 *10^{-3} mol/L\)

Substituting these values into the Henderson-Hasselbalch equation, we get:

\(pH = pKa + log([A^-]/[HA])\)

\(pH = -log(1.75 * 10^{-5}) + log(0.271 mol/L / 15.5 * 10^{-3} mol/L)\)

pH = 9.13

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The osmotic pressure of the system is 17.1 atm.

Osmotic pressure is the pressure that must be applied to a solution in order to prevent the flow of solvent from a region of higher concentration to a region of lower concentration across a semi-permeable membrane. A semi-permeable membrane allows only solvent molecules to pass through, while preventing the passage of solute molecules.

π=i c R T

π= osmotic pressure

i = Van't Hoff factor

c = concentration

R = gas constant

T = temperature

π= 1 * 0.85 * 0.08206 * 245

= 17.1 atm

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The completed table that fills the formula for the ionic compound has been given below:

To form an ionic compound from the given cation and anion we need to balance the charges of the cation and anions.

For example: Suppose we have a cation C3+ and an anion A-. Thus, to balance the charge we need 1C3+ and 3A-, the formula of the ionic compound formed CA3.

Ion K+ NH4+ Mg2+ Fe3+

Cl- KCl NH4Cl MgCl2 FeCl3

OH- KOH NH4OH Mg(OH)2 Fe(OH)3

CO32- K2CO3 (NH4)2CO3 MgCO3 Fe2CO3

PO43- K3PO4 (NH4)3PO4 Mg3(PO4)2 FePO4

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Answer:

Explanation:

The Law of Conservation of Mass is defined and explained using examples of reacting mass calculations using the law are fully explained with worked out examples using the balanced symbol equation. The method involves reacting masses deduced from the balanced symbol equation.

When the 0.500 M silver nitrate solution is added to the 1.50 g mixture of sodium nitrate and sodium chloride in water, a reaction occurs.

When the 0.500 M silver nitrate solution is added to the mixture of sodium nitrate and sodium chloride, the following reaction takes place:

NaNO₃(aq) + AgNO₃(aq) → AgNO₃(s) + NaNO₃(aq)

NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq)

The solid produced is silver chloride (AgCl), which is a white precipitate.

At the atomic/molecular level, the following species would be seen:

To calculate the percent sodium chloride in the original unknown mixture, we need to know how much of the white solid we collected. Let's assume we collected 2.00 g of silver chloride.

We need to compute the number of moles of silver chloride produced:

2.00 g AgCl x (1 mol AgCl/143.32 g AgCl) = 0.01395 mol AgCl

Since silver nitrate is in excess, all the chloride ions in the original mixture will react with silver ions to form silver chloride. The number of moles of chloride ions in the original mixture is therefore equal to the number of moles of silver chloride produced:

0.01395 mol Cl- = 0.01395 mol NaCl

To calculate the percent sodium chloride in the original mixture, we need to know the total mass of the mixture:

1.50 g NaNO₃ + NaCl = 1.50 g

The percent sodium chloride is:

(0.01395 mol NaCl x 58.44 g/mol NaCl) / 1.50 g x 100% = 54.4% NaCl

Therefore, the original mixture was 54.4% sodium chloride and 45.6% sodium nitrate.

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Answer:

Rain

Explanation:

Clouds are formed from water vapor, which turns into ice when the temperature is below freezing, and falls as liquid rain water when temperatures are above freezing. Since the temperatures in the clouds and in the air are above freezing, rain will fall in Florida.

Answer:

Rain

Explanation:

The proper numbering is 4, 2, 1, and 3.

The following sequence of actions can be used to describe how an undersea sedimentary rock is formed.

Sedimentary Rock

In a basin, sediments and animal skeletons start to accumulate.

The material that has been deposited starts to become bound together by a glue ingredient brought in by running water, such as calcite or clay. The deposits start to become harder.

The deposits eventually transform into rock that is solid and hard. The new rock is a mixture of several organic and inorganic components.

Existing rocks become sediments as a result of weathering.

What causes sedimentary rocks to form?

Sedimentary rocks are formed when previously existing rocks or pieces of extinct animals accumulate on the surface of the Earth. Sediment that has been buried deeply becomes compacted

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Answer:

mass = 3.89 g

Explanation:

hope this helps

There are 3.89 grams in 5.32 ×10²² molecules  of carbon dioxide.

Molecule is defined as a substance which is made up two or more atoms which are held together by forces of attraction known as chemical bonds. It may be homo-nuclear as in oxygen where it is composed of same type of atoms or hetero -nuclear as in case of water where the molecule is made up of two different types of atoms.

Number of molecules in a substance can be calculated  from the formula mass of substance divided by Avogadro's number and  then multiplied by it's molecular weight.

In the given example , number of molecules of carbon dioxide is calculated as, 5.3×10²²/6.022×10²³×44= 3.89 g

Thus, there are 3.89 g molecules of carbon dioxide in 5.32×10²² molecules.

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The curious and observant are the words in the story which helps the reader understand the meaning of the word avid.

This refers to when an individual is very enthusiastic or interested in something.

In paragraph 1 , the words which makes us understand the word 'avid' is the character being curious and observant which shows there is interest.

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When the moon is at point 2, it will be covering Florida, which will cause some areas of the earth to be dark while others will be light.

Our home planet is Earth. According to scientists, the formation of Earth and its moon coincided with that of the entire solar system. The estimated age of that event is approximately 4.5 billion years ago. The solar system's fifth-largest planet is Earth. Its diameter is roughly 8,000 kilometers.

We have life on our home planet, that also shields us from outer space. Our own planet, Earth, is a world unto itself. Earth, as third planet from the sun, is the only place in the entire cosmos where the existence of life has been established.

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Florida will be under the shadow of the moon at point 2, making some parts of the earth dark and others light.

A year is mainly divided into four seasons- winter, spring , summer and autumn. These seasons are experienced due to change in the position of earth around the sun

Earth is our home planet. According to scientists, the development of the Earth and its moon occurred simultaneously with that of the solar system as a whole. That incident occurred roughly 4.5 billion years ago, according to estimates. The fifth-largest planet in the solar system is Earth. It has a circumference of about 8,000 kilometers.

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Answer:

The correct option is a: Hg-183.

Explanation:

The alpha decay is given by:

\(^{A}_{Z}X \rightarrow ^{A-4}_{Z-2}Y + ^{4}_{2}He\)

Hence, if Polonium-191 decays by emitting an alpha particle we have:

\(^{191}_{84}Po \rightarrow ^{187}_{82}Pb + ^{4}_{2}He\)        

Now, if Pb-187 also decays by emitting an alpha particle we have:

\(^{187}_{82}Pb \rightarrow ^{183}_{80}Hg + ^{4}_{2}He\)        

Therefore, the correct option is a: Hg-183.

I hope it helps you!

CO2 and H2O are the products, and CH4 and O2 are the reactants.

Methane and oxygen react in the provided reaction to produce water and carbon dioxide as well as heat and light. This process is therefore categorised as a combustion reaction.

Exothermic combustion, which releases energy, occurs when methane or octane are burned. CO2 + 2 H2O + energy = CH4 + 2 O2 The products' energies are lower than the reactants' energies. Methane (CH4) and oxygen react to produce carbon dioxide and water.

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Answer:

See below

Explanation:

Conversion factor :  1 ft^3  = 28 .317  liters

$ 1.30 /( 17 ft^3 *  28.317 liters/ft^3)    =   $.0027  per liter  

A quasar is a star that emits intense radio and light energy.

A quasar is an extremely bright radio source. It is called a quasi-stellar radio source. It appears to be like a star but is not a star. These quasars are young galaxies that are located far away from us and are highly luminous. The luminosity of a quasar is 1000 times greater than the luminosity of a milky way galaxy.

A quasar is powered by a supermassive black hole with its mass ranging from millions to tens of billions of solar masses, surrounded by a gaseous accretion disc.

The quasars were first discovered in the 1950s using the Hubble space telescope and were found to be a massive bright source emitting radio waves of unknown origin. But now, millions of quasars were discovered.

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Answer:

The second picture

Explanation:

The first picture shows a solid because the particles of a solid are organized and compact. They can only vibrate in place

The third picture represents a gas because of how spaced out each particle is. They can move fast and erratically.

The second picture is the liquid because the particles aren't extremely packed, so they have space to move.

Answer:

The second one is correct

Answer:

The term “flat bone” is somewhat of a misnomer because, although a flat bone is typically thin, it is also often curved. Examples include the cranial (skull) bones, the scapulae (shoulder blades), the sternum (breastbone), and the ribs. Flat bones serve as points of attachment for muscles and often protect internal organs.

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Answer:

its b

Explanation: