Solubility of La(IO3)3 in a solution that contains 0.100M

Answer:

Crop rotation

Explanation:

The growing of different crops in succession on a piece of land to avoid exhausting the soil and to control weeds,pets,and diseases

At STP, 1 mole of any gas occupies 22.4 L of space. Since we are given STP conditions here, we can use this ratio to determine the number of moles of CO gas: (32.8 L CO)/(22.4 mol CO/L CO) = 1.51 mol CO.

So, there are 1.51 moles of CO gas.

Answer

Explanation

Given:

Initial volume of the gas, V₁ = 23.0 mL

Initial pressure of the gas, P₁ = 1.45 atm

Initial volume of the gas, V₁ = 23.0 mL

The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

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The deforestation of tropical rainforest trees to create farms and pastures, and to harvest trees for construction has increased soil erosion.

This means that deforestation of tropical rainforest trees to create farms and pastures, and to harvest trees for construction has increased soil erosion

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There are approximately 0.16 moles of gas present in the lungs.

To solve this problem, we can use the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:

PV = nRT

where R is the gas constant.

First, we need to convert the temperature to Kelvin:

T = 37°C + 273.15 = 310.15 K

Next, we can plug in the given values:

P = 1.0 atm

V = 4.0 L

T = 310.15 K

We also need to find the value of R, which depends on the units we are using for pressure, volume, and temperature. In this case, we are using atmospheres, liters, and Kelvin, so we can use the value:

R = 0.08206 L·atm/K·mol

Now we can rearrange the ideal gas law to solve for the number of moles:

n = PV/RT

n = (1.0 atm)(4.0 L)/(0.08206 L·atm/K·mol)(310.15 K)

n = 0.1638 mol

Therefore, there are approximately 0.16 moles of gas present in the lungs.

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The correct answer is: Atoms are the building blocks that make up elements. At the center of each atom is a nucleus composed of small particles called protons and neutrons. Nuclei is the plural of nucleus; option C.

The atomic number of an element is the number of protons present in the nucleus of the atom of the element.

The nucleus is the center of the atom and is the heaviest part of the atom.

Another sub-atomic particle fund in the nucleus is the neutron.

Elements are named according to the number of protons in the nuclei.. This is because the number of protons in the nucleus of any given atom whereas the neutron number may vary, Also, electrons are easily removed from atoms of elements.

In conclusion, the number of protos in atom is used to name the atom.

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Answer:

Here is your answer!!

Explanation:

YW! :]

Answer:

Be replacement

Explanation:

srry they delted my answer before:( someone from brainly all i did was added a link for a quizlet that would help you.. :(

Answer:

Be

Replacement

Explanation:

Consumers are organisms which depend on the producers or autotrophs for their food and nutrition.

Consumers are also known as heterotrophs, and they feed on the producers (autotrophs or self-feeders or plants) and herbivores (animals that eat plants) for food and energy. They don't produce their own food.

There are four types of consumers:

1) Primary – Herbivores are known as primary consumers and their source of food is plants or the first trophic level of the food chain. Example, Rabbits, Butterflies, Zooplanktons, etc.

2) Secondary – these consumers eat both plants and herbivores and are therefore also known as omnivores. Example, Ants, Crabs, Rats, Humans, etc.

3) Tertiary – these consumers eat primary and secondary consumers. Thus, they can be omnivores as well as carnivores. Example, Hawks, Snakes, Lions, etc.

4) Quaternary – these consumers prey on the tertiary consumers. Example, Polar bear, Alligator, etc.

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We will be left with 16g after 6years

The half-life of  radioactive isotopes refers to the amount of time it will take for half of the amount of the original isotope to decay.

it is calculated as

N(t)=N₀(\(\frac{1}{2}\))^(t/t₁/₂)

where,

N(t) = quantity of the substance remaining

N₀ = initial quantity of the substance

 t= time elapsed

t₁/₂ = half life of the substance

Given that:

The initial quantity is 1024g,

The half-life is 1year,

6 years is the time elapsed.

We have that

N(t)=N₀(\(\frac{1}{2}\))^(t/t₁/₂)

N(t)=1024(\(\frac{1}{2}\))^(6/1)

N(t)=1024(\(\frac{1}{2}\))⁶

N(t)=1024 x 0.015625

N(t)=16g

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The first equation is a balanced chemical equation because the number of atoms of each element on the left side of the equation is equal to the number of atoms of each element on the right side of the equation.

2HCl(aq) + Ca(OH)₂(aq) → CaCl₂(aq) + 2H₂O(l)

A balanced chemical equation is an equation that has the same number of atoms for each element on both sides of the equation. For example, the balanced chemical equation for photosynthesis is 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂. This equation shows that the number of atoms of each element on the left side is equal to the number of atoms of the same element on the right side.

An atom is the smallest unit of matter that makes up all physical substances. It is composed of three smaller particles – protons, neutrons, and electrons. Protons have a positive charge and neutrons have no charge, while electrons have a negative charge. Protons and neutrons make up the nucleus of an atom, located at its center, while electrons orbit around it. Atoms of the same element all have the same number of protons, but they can differ in the number of neutrons and electrons.

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Plasma or cell membrane is the membrane that surrounds the cell, separating the external environment from the cytoplasm and controlling what enters and leaves the cell.

The models of both the plant and animal cells is attached in diagram below. The shaded dark area is the plasma or cell membrane.

From the model given, the plasma membrane is located at the outer part of the cell. Therefore, it controls what enters and leaves the cell.

This is because is the membrane is made up of lipid bilayer.

This allows only the movement of non polar small substances across the membrane in a direction against their concentration gradient.

Therefore, plasma membrane contributes to how the cell function as a whole by controlling the materials that are transported in and out of the cell.

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Answer:

6.591

Explanation:

= 6.951 moles

Answer: 8

Explanation:

The reaction rate to the nearest whole number is 36.1 mg/l/sec.

To calculate the reaction rate we would use the formula already provided which is: mass of tablet/volume of water ÷ Reaction time.

For the tablet with a 3°C Reaction time, we would calculate the rate as follows:

1000 mg * 0.2L/138.5 sec = 36.1 mg/L/sec.

The final result has all three variables and the resulting answer is the reaction rate.

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Complete Question:

Assume that each tablet's mass was 1,000 mg, and remember that you used 0,200 L of water each time,

Compute the reaction rate to the nearest whole number using the formula below,

mass of tablet/volume of water

Reaction Rate = mass reaction time

3°C Reaction time = 138.5 sec

Reaction rate = mg/l/sec

Answer:

To calculate the number of photons required to heat the coffee, we can follow these steps:

Calculate the mass of the coffee using its volume and density:

mass = volume x density = 205 mL x 0.997 g/mL = 204.185 g

Calculate the amount of heat required to raise the temperature of the coffee using its mass, specific heat capacity, and temperature change:

q = m x c x ΔT = 204.185 g x 4.184 J/(g⋅K) x (62.0 - 25.0) °C = 32289.6 J

Calculate the energy of each photon using the formula E = hc/λ, where h is Planck's constant, c is the speed of light, and λ is the wavelength of the microwave radiation:

E = (6.626 x 10^-34 J⋅s) x (3.00 x 10^8 m/s) / (0.124 m) = 5.067 x 10^-23 J

Calculate the number of photons required to deliver the amount of energy needed to heat the coffee:

number of photons = q / E = 32289.6 J / 5.067 x 10^-23 J = 6.368 x 10^25 photons

Therefore, approximately 6.368 x 10^25 photons are required to heat 205 mL of coffee from 25.0 ∘C to 62.0 ∘C using microwave radiation with a wavelength of 12.4 cm.

There are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

To determine the number of water molecules in the given volume of water, we need to use the relationship between mass, volume, and molar mass of water.

First, we need to find the mass of water in the bottle:

Mass = Density * Volume

Mass = 0.967 g/mL * 499.8 mL = 483.9 g

Next, we need to convert the mass of water to moles using the molar mass of water. The molar mass of water (H2O) is approximately 18.015 g/mol.

Moles = Mass / Molar mass

Moles = 483.9 g / 18.015 g/mol = 26.88 mol

Finally, we can calculate the number of water molecules using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules = Moles * Avogadro's number

Number of molecules = 26.88 mol * (6.022 x 10^23 molecules/mol) = 1.62 x 10^25 molecules

Therefore, there are approximately 1.62 x 10^25 water molecules in the 499.8 mL bottle of water.

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Answer:

The scientist learn about the Earth core by the seismic waves by seeing how the core level are different from each other. Like the heat, the width, and how deep it is.

Answer and Explanation:

Theories and scientists make predictions about what could potentially be in the Earth's core. Earth is said to consist of many layers, but scientists ponder what lies in the middle. Earthquakes and volcanoes kind of work together in a way, since they both deal with Earth's energy. And yes, seismic waves do teach scientists about the two, but it's more than that.

Both earthquakes and volcanoes can teach scientists how these natural disasters affect nature. For example, when lava touches a forest floor, or even rock, it can melt everything in it's path. But, it can produce new plant life once the Earth beneath it heals. Earthquakes can help teach scientists about the layers in the Earth and where these spots are most frequent in the world where they appear.

Also, lava from volcanoes can tell scientists that there is some sort of liquid towards the center of the Earth, not only types of solids.

Let me know if you have more questions, I hope this helps.

Answer:

HCO3- (aq) + H2O (I) <--> H2CO3 (aq) + OH- (aq)

Explanation:

The equation to distinguish between cation and anion hydrolysis is given below :  

HCO3- (aq) + H2O (I) <--> H2CO3 (aq) + OH- (aq)

The important thing to remember is their origin. The anions can react with water and can produce hydroxide ions while hydroxide ions make a solution basic.

The conjugate base of the specie HS^- is S^-

We know that form the Bronsted Lowry perspective of the acid and the base, the acid is the substance that can be able to give out a proton while the base is the kind of substance that can be able to accept a proton.

We can see here that the conjugate base is the specie that can be obtained by the loss of a proton from the HS^- as such we would have it as S^-.

Hence, we can see that the base that is the conjugate base in this sense is S^-.

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Answer:

4.80×10³ years

Explanation:

Let the original amount (N₀) of ²²⁶Rn = 1 g

Therefore,

12.5% of the original amount = 12.5% × 1 = 12.5/100 × 1 = 0.125 g

Next, we shall determine the number of half-lives that has elapse. This can be obtained as follow:

Original amount (N₀) = 1

Amount remaining (N) = 0.125 g

Number of half-lives (n) =?

N = 1/2ⁿ × N₀

0.125 = 1/2ⁿ × 1

0.125 = 1/2ⁿ

Cross multiply

0.125 × 2ⁿ = 1

Divide both side by 0.125

2ⁿ = 1/0.125

2ⁿ = 8

Express 8 in index form with 2 as the base

2ⁿ = 2³

n = 3

Thus, 3 half-lives has elapsed.

Finally, we shall determine the time taken for only 12.5% of the original sample of ²²⁶Rn to remain.

This can be obtained as follow:

Half-life (t½) = 1.60×10³ years

Number of half-lives (n) = 3

Time (t) =?

t = n × t½

t = 3 × 1.60×10³

t = 4.80×10³ years.

Thus, it will take 4.80×10³ years for 12.5% of the original sample of ²²⁶Rn to remain.

Answer:

Period 3

hope this helps!

An element that has the electron configuration [Ne] 3s²3p⁵ is in period  three as principal quantum number is three.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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Answer:

it would be B

Explanation:

newtons first law states that an object at rest will stay at rest until another object applies force to the object causing it to move

The definition of resonance is already well explained in the question, even though we have a good knowledge of the theory of how a molecule can be represented, in practice things might be different, this is why resonance is a representation of molecules that could have different structures. Ozone (O3) for example has 2 resonance structures.

The concentration of the original sulfuric acid solution is 0.05398M

In order to determine the concentration of the original sulfuric acid solution, we use the volume of the standard sodium hydroxide solution used in the titration along with the concept of stoichiometry.

Let us check the number of moles of sodium hydroxide (NaOH) used in the titration,

Moles of NaOH = Molarity of NaOH x Volume of NaOH

=0.1463M x 18.47 mL

= 0.002699 Moles

As the balanced chemical equation between Sulfuric acid (\(H_SO_4\)) and sodium hydroxide is 1:2, then we can deduct that 1 mole of sulfuric acid can react with 2 moles of sodium hydroxide.

In that case, the number of moles of sulfuric acid in the 10.00 mL sample is;

Moles of \(H_2SO_4\) = 0.002699 Moles x (1/2)

= 0.0013495 Moles

Now we can calculate the concentration of the original sulfuric acid solution:

That is, the concentration of \(H_2SO_4\) = Moles of \(H_2SO_4\) / Volume of original acid solution

=0.0013495 Moles / 0.02500L

=0.05398 M

Therefore, the concentration of the original sulfuric acid solution is approximately 0.05398 M.

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Explanation:

Carbon-14 has a half life of 5730 years, meaning that 5730 years after an organism dies, half of its carbon-14 atoms have decayed to nitrogen atoms. Similarly, 11460 years after an organism dies, only one quarter of its original carbon-14 atoms are still around.