If 66. 38 g of potassium chloride reacts with fluorine and produces potassium fluoride and chlorine how many moles of chlorine can you get?

Scientists were hesitant to support wegener and hess when they first presented their hypotheses just because of the conflict of stability of the continents and the ocean floor.

Scientists were hesitant to support Wegener and Hess when they first presented their hypotheses because their ideas went against the widely accepted scientific understanding of the time. Wegener's theory of continental drift, which proposed that the continents had once been part of a single landmass and had since moved apart, was not supported by any credible evidence or mechanism. Hess's theory of sea floor spreading, which proposed that new oceanic crust was being created at mid-ocean ridges and pushed away from them, was also not supported by any conclusive evidence. Additionally, both hypotheses conflicted with the prevailing belief in the permanence and stability of the continents and the ocean floor. These factors made it difficult for scientists to accept their ideas, despite the growing evidence in support of them.

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The molar heat of fusion for iron with a mass of 200.0g releases 9,840 cal when it freezes at its freezing point is 2,747.7 cal/mol.

The heat of fusion of a substance can be calculated by using the following formula:

Q = m∆H

Where:

However, the quantity of heat has been given as 9840calories. The molar heat of fusion of iron can be calculated by dividing the heat of fusion by the number of moles of iron.

Moles of iron = mass ÷ molar mass

moles = 200g ÷ 55.8g/mol

moles = 3.58moles

molar heat of fusion = 9840 cal ÷ 3.58mol

molar heat of fusion = 2748.6 cal/mol

Therefore, the molar heat of fusion for iron with a mass of 200.0g releases 9,840 cal when it freezes at its freezing point is 2,747.7 cal/mol.

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Answer:

A) 2,747.7 cal/mol

Explanation:

EDGE 2022

Answer:

element

Explanation:

Atoms are the building blocks of all matter. When a substance contains only one type of atom, it is called an element. Each element has a special name and unique properties that are different from all the rest of the elements. All known elements are organized on a chart called the periodic table of elements.

Answer:

An element

Explanation:

An element is a substance consisting the same type of atoms.

Answer:

6

Explanation:

To determine the number of neutrons we round 10.8 to 11 and subtract the atomic number (5) and get 6; therefore, boron has 6 neutrons.

The limiting reactant refers to the reactant that is in small amount. The extent of the reaction depends on the amount of the limiting reactant.

The term limiting reactant refers to the reactant that is in small amount, We shall now solve the questions individually.

1) The reaction equation is;

CaO + H2O → Ca(OH)2

Number of moles of CaO = 10 g/56 g/mol = 0.18 moles

Number of moles of H2O = 10 g/18 g/mol = 0.56

Since the reaction is 1:1, CaO is the limiting reactant

Mass of calcium hydroxide = 0.18 moles * 74 g/mol = 13.32 g

2) The reaction equation is;

Mg + Br2 → MgBr2

Number of moles of Mg = 1 g/24 g/mol = 0.042 moles

Number of moles of Br2= 5 g/160 g/mol = 0.031 moles

Since the reaction is 1:1, Br2 is the limiting reactant

Mass of MgBr2 =  0.031 moles * 184 g/mol = 5.7 g

3) The reaction equation is;

CuO + H2 → Cu + H2O

Number of moles of CuO= 2.00 g/80 g/mol = 0.025 moles

Number of moles of H2 = 1.00g/2 g/mol = 0.5 moles

Since the reaction is 1:1, CuO is the limiting reactant

Mass of Cu = 0.025 moles * 63.5 g/mol = 1.59 g

4) The reaction equation is;

2Na + F2 → 2NaF

Number of moles of Na = 2.30 g/23 g/mol = 0.10 moles

Number of moles of F2 =  2.85 g/38 g/mol = 0.075 moles

If 2 moles of Na react with 1 mole of F2

x moles of  Na reacts with 0.075 moles of F2

x = 0.15

Hence Na is the limiting reactant

Mass of NaF = 0.10 moles * 42 g/mol = 4.2 g

5) The equation of the reaction is;

Fe2O3 + 2Al → 2Fe + Al2O3

Number of moles of Fe2O3  =  8.00 g/160 g/mol = 0.05 moles

Number of moles of Al = 2.16 g/27 g/mol = 0.08 moles

If 1 mole of Fe2O3  reacts with 2 mole of Al

x moles of Fe2O3 reacts with 0.08 moles of Al

x = 0.04 moles

Hence, Fe2O3 is the limiting reactant

1 mole of Fe2O3  yileds 2 moles of Fe

0.05 moles yileds 0.05 moles  * 2 moles/1 mole = 0.1 moles

Mass of Fe = 0.1 moles * 56 g/mol = 5.6 g

6) The equation of the reaction is;

2Al + 3Cl2 → 2AlCl3

Number of moles of Al = 13.5 g/27 g/mol = 0.5 moles

Num ber of moles of Cl2 =  42.6 g /71 g/mol = 0.6 moles

If 2 moles of Al reacts with 3 moles of Cl2

x moles of Al reacts with 0.6 moles of Cl2

x = 0.4 moles

Al is the limiting reactant

Mass of AlCl3 = 0.4 moles * 133 g/mol = 53.2 g

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Isomers are compounds which have same empirical formula , same number of atoms are present but they have difference in arrangement if the atoms.

It is given that

There are four cis, trans isomers for 2-isopropyl-5-methylcyclohexanol

the cis, trans designations of the substituents are made relative to the oh group

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Answer:

2 8gram 8 8 C 2l 27 c 12,016N11

Answer:

The correct distance traveled by the train in 2 hours, if it travels at a speed of 100 km/h, would be 200 kilometers.

Explanation:

Answer:

traveled at a speed of 50mph

Explanation:

100/2 =50

Explanation:

False, gray whales average 75 miles per day at a speed of 5 mph and is the longest annual migration of any mammal.

Answer:

That would be speed.

Explanation:

175 g of sodium acetate trihydrate and 50 mL of distilled water (3.5 g NaC2H3O2. 3H2O per mL H2O) are combined to create the supersaturated solution. The mixture is then heated in a water bath while being occasionally stirred to create a clear, uniform solution.

To make a supersaturated solution of sodium acetate in water, you would need to dissolve more sodium acetate in the water than would normally be possible at a given temperature. This can be achieved by heating the water to a temperature at which more sodium acetate can be dissolved, and then slowly adding the sodium acetate while stirring until no more will dissolve. Once the desired concentration of sodium acetate is reached, the solution should be cooled to room temperature or below, which will cause the excess sodium acetate to come out of solution and form crystals.

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Answer:

Limiting reactant: O2

grams NO2 produced = 230.276 g NO2

grams of NO unused = 26.67 gNO

Explanation:

2NO + O2 --> 2NO2

Step 1: Determine the molar ratio NO:O2

molar ratio NO:O2 = 5.895: 2.503 = 2.35

stoichiometric molar ratio NO:O2 = 2:1

So, O2 is the limiting reactant.

Step2: Determine the grams of NO2:

?g NO2 = moles O2 x (2moles NO2/1 mol O2) x (MM NO2/ 1 mol NO2) = 2.503 x 2 x 46 = 230.276 g NO2

Step 3: Determine the amount of excess reagent unreacted

moles excess NO reacted = moles O2 x (2 moles NO/1 mol O2) = 2.503 x 2 = 5.006 moles NO reacted

moles NO unreacted = total moles NO - moles NO reacted = 5.895-5.006 =0.889 moles NO unreacted

mass NO unreacted = moles NO unreacted x MM NO = 0.889 x 30 =26.67 g NO unreacted

Answer:

The answer is

Explanation:

The density of an object can be found by using the formula

From the question

mass of metal = 210 g

volume = 81 cm³

Substitute the values into the above formula and solve for the density

That's

= 2.592592

We have the final answer as

Hope this helps you

pH is an important parameter in aquatic environments, and the relationship between pH and the mortality of minnows is a complex one.

Minnows are sensitive to pH, and changes in pH can cause mortality in these fish.

pH is a measure of the acidity or alkalinity of a solution. It is measured on a scale of 0 to 14, with 7 being neutral, values below 7 are acidic, and values above 7 are alkaline. Fish in freshwater ecosystems are sensitive to changes in pH, and changes in pH can cause mortality in these fish.

Minnows are among the fish species that are sensitive to pH changes and can die if pH conditions become too extreme.

Relationship between pH and mortality of minnows:

Minnows are more sensitive to acidic pH than alkaline pH. When the pH of water becomes too acidic, the fish may experience respiratory distress, which can lead to death.

Minnows can also die in water with alkaline pH, but this usually occurs at much higher pH levels. At high pH levels, fish can experience osmoregulatory failure and may not be able to maintain their internal balance. This can lead to death.

The ideal pH range for minnows is between 6.5 and 7.5, and maintaining the pH within this range is important for their survival. Changes in pH can occur due to a variety of factors, including acid rain, pollution, and changes in temperature.

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The given chemical equation is unbalanced.

An unbalanced equation is a chemical equation that does not have the same number of atoms of each element on both sides of the equation. In other words, the number of atoms of each element present in the reactants (the substances being reacted) is not the same as the number of atoms of each element in the products (the substances produced by the reaction).

As one can see from the equation, there are more Sodium ( Na ) atoms on the left side of the equation than on the right side. The equation is therefore unbalanced.

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The age of the sample can be estimated as two times the half-life of the radioactive isotope: Age = 2 * 500 million years = 1 billion years.

If the radioactive isotope has a half-life of 500 million years and the rock sample contains three times as many daughter isotopes as parent  isotopes, we can use this information to estimate the age of the sample . the ratio of daughter isotopes to parent isotopes provides insight into the number of half-lives that have occurred.

In this case, if the sample contains three times as many daughter isotopes as parent isotopes. This is because after one half-life, the number of parent isotopes would be halved and the number of daughter isotopes would be equal to the number of parent isotopes. After another half-life, the number of parent isotopes would be halved again, resulting in three times as many daughter isotopes.

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Answer:

B. mitochondria to do cellular respiration.

Explanation:

A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.

A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.

All living organisms need energy to function. Both unicellular organisms and multicellular organism retrieve energy using mitochondria to do cellular respiration.

Basically, mitochondria is one of the cell organelles found in all living organisms and it is known as the powerhouse. Therefore, mitochondria provides all the energy required in the cell by transforming energy forms through series of chemical reactions; breaking down of glucose into Adenosine Triphosphate (ATP) used for providing energy for cellular activities in the body of living organisms.

The RK of methyl orange is 3.5, as it changes color from red to yellow at a pH of 3, and has its most intense color (yellow) at pH 6.

Methyl is an organic compound with a formula of CH3, which is a single carbon atom bonded to three hydrogen atoms. It is a type of hydrocarbon and is the simplest of all alkyl compounds. Methyl is a versatile molecule that can be found in a variety of compounds, including pharmaceuticals, solvents, fragrances, and food additives. It is also used in the production of plastics, rubber, dyes, and other synthetic materials. Additionally, methyl is a key component of natural gas, oil, and coal, and can also be produced from biomass. In the body, methyl is used for a variety of biological processes, such as the metabolism of proteins, carbohydrates, and fats.

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Hazardous gases are those that can cause harm to humans, animals, and the environment. Some of the most dangerous gases include carbon monoxide, sulfur dioxide, nitrogen oxides, and volatile organic compounds.

Gas Name of Gas Effects on Health Effects on the Environment Carbon Monoxide Colorless, odorless gas It can cause headaches, dizziness, nausea, vomiting, and even death in severe cases.

Air pollution, climate change Sulfur Dioxide A colorless gas with a pungent odor Irritation of the eyes, nose, throat, and respiratory system.

It can lead to bronchoconstriction, reduced lung function, and increased risk of respiratory infection.

Acid rain, soil and water pollution Nitrogen Oxides A group of gases including nitrogen monoxide, nitrogen dioxide, and nitrous oxide Respiratory problems, such as coughing, wheezing, and shortness of breath. It can also increase the risk of respiratory infections.

Acid rain, smog, ground-level ozone formationVolatile Organic Compounds (VOCs)A group of chemicals that includes benzene, formaldehyde, and toluene.

Headaches, nausea, and other health effects, including cancer. VOCs contribute to the formation of ozone in the lower atmosphere (troposphere), which can lead to respiratory problems and other health effects.

In conclusion, hazardous gases can have serious effects on human health and the environment.

It is important to take steps to reduce the emission of these gases, such as using clean energy sources, reducing the use of fossil fuels, and adopting environmentally friendly practices.

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Total concentration of sodium ions is 3.00 moles/liter.

The concentration of sodium ions in a solution containing 0.750 moles of sodium sulfate dissolved in 0.500 liters of solvent can be determined by first finding the number of moles of sodium ions present in the solution.

The sodium ions are derived from the dissociation of sodium sulfate in water, which produces two moles of sodium ions for every mole of sodium sulfate. Since there are 0.750 moles of sodium sulfate in the solution, there are 1.5 moles of sodium ions present in the solution.

To calculate the total concentration of sodium ions, divide the number of moles of sodium ions by the volume of the solution in liters:Total concentration of sodium ions = moles of sodium ions / liters of solution

Total concentration of sodium ions = 1.5 moles / 0.500 liters = 3.00 moles/liter

Therefore, the total concentration of sodium ions present in the solution is 3.00 moles/liter.

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Answer:

pH = 3.69

Explanation:

HCl is a strong acid. It will disscociates completely into dissoluted ions such that,

\([H^+]=2\times 10^{-4}\ M\)

The formula for pH is given by :

\(pH=-log[H^+]\\\\pH=-log(2\times 10^{-4})\\\\pH=3.69\)

So, the pH of the solution is 3.69.

The answer to your question is 4.

The characteristics of the individual molecules and their molecular geometry determine the types of intermolecular forces that a compound displays.

Intermolecular forces typically fall into one of three categories:

All molecules exhibit London dispersion forces, the weakest kind of intermolecular force. They develop as a result of brief variations in electron density that lead to the creation of instantaneous dipoles. As molecular size and surface area grow, London dispersion forces rise.

Interactions between molecules possessing permanent dipoles, such as polar covalent compounds, are known as dipole-dipole interactions. There is a net attractive force created when the positive ends of two dipoles are drawn together. London dispersion forces are outweighed by interactions between dipoles.

When hydrogen atoms are joined to strongly electronegative atoms like nitrogen, oxygen, or fluorine, an unique sort of dipole-dipole interaction called hydrogen bonding takes place. Due to the significant difference in electronegativity between hydrogen and several other atoms, hydrogen bonds are a sort of intermolecular force that are exceptionally powerful.

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Technological advances have played a vital role in the development of space exploration programs. Since the beginning of human space exploration, many missions have increased our understanding of space. The ability to escape Earth's gravity is the technological advance that made it possible to send satellites, probes, and vessels into space.The correct answer is option-A.

The ability to escape Earth's gravity is the technological advance that made it possible to send satellites, probes, and vessels into space. Earth's gravitational pull is a significant obstacle to overcome for any spacecraft. Earth's gravitational pull is the force that holds all objects on the planet in place, including the atmosphere.

When a spacecraft launches into orbit, it must reach a certain velocity known as escape velocity. This velocity is the speed needed to break free of Earth's gravity and continue on a trajectory into space.The development of rockets and their engines allowed for the creation of enough power to break through the Earth's gravitational pull.

The rockets propel the spacecraft into space, and the engines provide the necessary power to break free from Earth's gravitational pull. This ability to escape Earth's gravity opened up a whole new world of space exploration possibilities for humans.

The first satellite, Sputnik, was launched into orbit by the Soviet Union in 1957, marking the beginning of the space age. The ability to send satellites, probes, and vessels into space has revolutionized how we study the universe, from monitoring weather patterns to studying distant planets and galaxies.Therefore, the correct answer is option-A.

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Answer:

They make a rice Krispe gramcracker bar baby

Explanation:

Answer: When they meet they instantly fall in love, (lol) and have a baby.... They name the baby S'more because it has features from the graham cracker and the rice krispie.

Stay safe and have a Merry Christmas!!!!!!!! :D  

Maybe a S'more rice krispie.....

According to the Bohr model of the hydrogen atom, the difference of energy between the levels n=1 and n=[infinity] corresponds to the ionization energy of hydrogen.

The Bohr model of the hydrogen atom explains the properties of the atom in terms of a nucleus consisting of a proton, with a single electron in orbit around it, similar to the structure of the solar system with planets orbiting around the sun. The model is an early model of the atom and is still useful for teaching purposes as it describes the structure of the hydrogen atom with good accuracy.

The ionization energy (IE) of an atom or molecule is the energy required to remove one or more electrons from that species in the gas phase. The ionization energy for hydrogen is the energy necessary to remove an electron from a hydrogen atom to produce a hydrogen ion (H+).

The energy needed to move an electron from one energy level to another is defined as the energy difference between the two levels. When an electron transitions from a higher to a lower energy level, it emits a photon. The photon energy corresponds to the energy difference between the two levels. When an electron moves from a lower to a higher energy level, the atom absorbs a photon with an energy equal to the energy difference between the two levels.

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Answer:

58.33 g/mol

Explanation:

Explanation:

Answer:

image 3 and 4show chemical reactions

Explanation:

Answer:

Empirical formula: CO₂

Explanation:

The empirical formula is defined as the simplest ratio of atoms present in a molecule. We must convert the mass of carbon and oxygen to moles as follows:

Carbon -Molar mass: 12.01g/mol-

3.0g * (1mol / 12.01g) = 0.250 moles C

Oxygen -Molar mass: 16g/mol-

8.0g * (1mol / 16g) = 0.50 moles O

The ratio of O:C is:

0.50mol / 0.250mol = 2

That means the empirical formula is: