which types of properties may be exploited using analytical separations chemistry?

Answer:

The energy of the electromagnetic waves and gravitational radiation is a radiant energy. Radiant energy can travel through air, liquid, glass, space, or any other substance. It is created by changing configuration of electrons. Radiant energy can be transmitted in a vacuum environment, so the matter is not essential in transmitting radiant energy.

Explanation:

Explanation:

I just answer on a different account

The mass (in grams) of lithium hydroxide, LiOH present, given that 3 moles of it were obtained from the reaction is 72 g (Last Option)

We know that the mass of a substance is related to the number of mole according to the following formula:

Mole = mass / molar mass

With the application of the above formula, we can obtain the mass of lithium hydroxide, LiOH present. Details below:

Mole = mass / molar mass

Cross multiply

Mass = Mole × molar mass

Mass of LiOH = 3 × 24

Mass of LiOH = 72 g

Thus, the mass of lithium hydroxide, LiOH is 72 g (last option)

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Answer: 62.4g according to a quizlet

Explanation:

Answer:

One.

Explanation:

Both sides of the equation need 2 Silver atoms, 1 Nitrogen, 3 Oxygen and 1 Copper to be balanced which is the same as the side of reactants.

The standard free-energy change at 25 ∘C for the given reaction, Mg(s)+Fe₂+(aq)→Mg₂+(aq)+Fe(s) can be calculated using the equation:ΔG∘ = ΣnΔGf∘ (products) − ΣnΔGf∘ (reactants)where ΔGf∘ is the standard free energy of formation of the compound, n is the stoichiometric coefficient of each compound in the reaction.

The values of ΔGf∘ for the given reaction are:

Mg₂+ (aq):−467.2 kJ/mol Fe(s): 0 kJ/mol Fe₂+(aq): −237.2 kJ/mol Mg(s): 0 kJ/molΔG∘ =

ΣnΔGf∘ (products) − ΣnΔGf∘ (reactants)ΔG∘ =

[ΔGf∘ (Mg₂+ (aq)) + ΔGf∘ (Fe(s))] - [ΔGf∘ (Mg(s)) + ΔGf∘ (Fe₂+(aq))]ΔG∘ =

[−467.2 kJ/mol + 0 kJ/mol] - [0 kJ/mol + (−237.2 kJ/mol)]ΔG∘ =

−230.0 kJ/mol At 25 ∘C, the standard free-energy change for the given reaction is −230.0 kJ/mol. The units of ΔG∘ are kilojoules per mole (kJ/mol). Hence, the answer is -230.0 kJ/mol.

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Answer:

Fe₂O3 +6 HCI - 2 FeCl3 + 3 H₂O

Explanation:

hope this helps.

The balanced equation obeys the law of conservation of mass. The balanced equation for the reaction of rust is Fe₂O₃ +6 HCI - 2 FeCl₃ + 3 H₂O. The correct option is C.

A chemical equation in which the number of atoms of reactants and products on both sides of the equation are equal can be defined as the balanced chemical equation. The amount of products and reactants on both sides of the equation are equal.

The numbers which are added to balance a chemical equation are called the coefficients. They are added in front of the formulas.

The reaction of HCl with iron results in the formation of ferrous chloride (FeCl₂ or FeCl₃). When acid reacts with metal, it dissolves both the rust and the metal.

The balanced equation is:

Fe₂O₃ +6 HCI - 2 FeCl₃ + 3 H₂O

Thus the correct option is C.

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The 3.50 moles of iron with the chemical formula Fe contain there are  2.1 × 10²⁴ atoms of iron.

Iron's molecular weight is Fe = 3.50 moles.

The number of the moles of the material Equals mass / molar mass

The material has 6.022 x 1023 atoms per mole.

The formula for the Avogadro number is 6.022 1023. The letter Na serves as its emblem.

Fe = 3.50 x 6.022 x 1023 atoms, or 3.50 moles, of iron.

The iron's 3.50 moles (Fe = 2.1 1024 atoms)

A chemical formula is a shorthand representation of a chemical compound using symbols and numerical subscripts to indicate the types and number of atoms present in a molecule. Chemical formulas are used to describe the composition of substances and to predict their behavior in chemical reactions.

The symbols used in a chemical formula represent the elements present in the molecule, and the subscripts indicate the number of atoms of each element in the molecule. For example, the formula for water is H2O, which means that each molecule of water contains two hydrogen atoms (H) and one oxygen atom (O). Chemical formulas can be written for simple compounds, such as water, or complex molecules, such as proteins or DNA.

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The entire amount of greenhouse gases (such as carbon dioxide and methane) produced by human actions is known as a carbon footprint. One of the highest rates in the world, the average carbon footprint of a person in the United States is 16 tonnes.

As we drive, heat our homes with oil or gas, consume fuel for transportation, or use electricity produced from coal, natural gas, or oil, we all emit greenhouse gases.

Described by the WHO as a weight of CO2, a carbon footprint is a measurement of the effect your actions have on the amount of carbon dioxide (CO2) created by the combustion of fossil fuels.

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Answer:

Explanation:

Titration is

when in a lab someone uses

a small pipe called a

pipette

and

drop by drop

they add chemical B (titrant) to chemical A

until something happens

its done drop by drop to find out what is the exact amount needed to cause a reaction

sciencedirectcom

Answer:

Sodium bicarbonate and acetic acid reacts to carbon dioxide, water and sodium acetate.

Explanation:

Sodium bicarbonate and acetic acid reacts to carbon dioxide, water and sodium acetate. The solid baking soda was placed in liquid vinegar producing carbon dioxide gas, which is evident because of the formation of bubbles in the foaming mixture.

Answer:Magnesium (Mg) is a - reactant

Hydrogen (H2) is a - product

magnesium chloride (MgCI2) is a - product

hydrochloric acid (HCI) is a - reactant

Explanation: It’s in my notes

The comparison between the class barometer data and the air pressure shown in the weather report serves as a means to evaluate the accuracy and effectiveness of the barometer's measurements.

The comparison between the data from the class barometer and the air pressure shown in the weather report revealed a correlation between the two measurements. The class barometer readings were likely taken at the same time as the weather report's air pressure measurement to ensure accurate comparison.

If the class barometer readings closely matched the air pressure indicated in the weather report, it would suggest that the barometer was functioning correctly and providing reliable measurements. This would indicate that the class barometer could be used as a reliable tool for monitoring air pressure changes.

However, if there were significant discrepancies between the class barometer readings and the air pressure reported in the weather report, it could indicate a calibration issue with the barometer or potential inaccuracies in its measurements. In such a case, it would be necessary to investigate the reasons behind the discrepancies and determine the reliability of the class barometer for future use. It helps to determine the barometer's reliability as a tool for monitoring air pressure changes in the local environment.

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Approximately 23.0 grams of iron and 9.86 grams of oxygen gas reacted to form 65.6 grams of Fe2O3.

We can use stoichiometry to solve this problem. Stoichiometry is a mathematical tool used to relate the quantities of reactants and products in a chemical reaction.

From the balanced equation:

4 Fe + 3 O2 → 2 Fe2O3

We can see that 4 moles of Fe react with 3 moles of O2 to produce 2 moles of Fe2O3.

Let's start by finding the number of moles of Fe2O3 produced:

molar mass of Fe2O3 = 2 x atomic mass of Fe + 3 x atomic mass of O = 2 x 55.85 g/mol + 3 x 16.00 g/mol = 159.69 g/mol

moles of Fe2O3 = mass of Fe2O3 / molar mass of Fe2O3 = 65.6 g / 159.69 g/mol = 0.411 moles

Now we can use the stoichiometry of the balanced equation to determine the number of moles of Fe and O2 that reacted to form 0.411 moles of Fe2O3:

4 Fe + 3 O2 → 2 Fe2O3

4 moles of Fe react with 3 moles of O2 to produce 2 moles of Fe2O3

So, the number of moles of O2 that reacted is:

moles of O2 = (3/4) x moles of Fe2O3 = (3/4) x 0.411 moles = 0.308 moles

The number of moles of Fe that reacted is the same as the number of moles of Fe2O3 produced, since the mole ratio of Fe to Fe2O3 is 4:2 (or 2:1):

moles of Fe = moles of Fe2O3 = 0.411 moles

Finally, we can convert the number of moles of Fe and O2 to grams using their respective molar masses:

mass of Fe = moles of Fe x molar mass of Fe = 0.411 moles x 55.85 g/mol = 23.0 g

mass of O2 = moles of O2 x molar mass of O2 = 0.308 moles x 32.00 g/mol = 9.86 g

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Answer:

Adding Na3PO4(s) will introduce more PO4^3- ions into the solution, which will react with H3O+ ions to form more H3PO4 and H2O through the reverse reaction. This will shift the equilibrium to the left, decreasing the concentration of H3O+ ions and increasing the concentration of H3PO4 and H2O. Therefore, the concentration of H3O+ ions will decrease, and the correct answer is (C) H3O+.

The common name of the following compound CH₃CH₂OCH₃ is ethyl methyl ether.

Ethyl methyl ether, commonly known as ethyl methyl ether, is a colorless, flammable gas with a mild odor. It is an ether composed of two carbon atoms in a row (ethane), an oxygen atom connected to one of them, and a methyl (CH₃) group linked to the other.

The chemical formula for ethyl methyl ether is CH₃CH₂OCH₃. The IUPAC name for ethyl methyl ether is ethoxyethane, but it is more often referred to by its common name. It is used in a variety of industrial and laboratory applications, such as as a solvent for cellulose, resins, and oils, as well as a refrigerant and a local anesthetic.

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A mixture of hydrogen and oxygen would not need to have a certain ratio of hydrogen atoms to oxygen atoms to differ from the compound known as water.

A water molecule has 2 hydrogen atoms bonded chemically to oxygen atoms and has the formula H₂O.

In a chemical reaction, two atoms react together chemically to form a new product which means the reactants lose their individual properties and obtain new properties of the product formed.

Hence, water is a compound as hydrogen and oxygen atoms are bonded chemically to each other.

On the other hand, if oxygen and hydrogen form a mixture which is a physical change then they retain their individual properties in the mixture. They do not need to be in a specific ratio and there are no chemical changes taking place.

Chemical change determines if a substance is a mixture or a compound.

Thus, a mixture of hydrogen and oxygen is different from water if it doesn't have a certain ratio of hydrogen atoms to oxygen atoms.

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Given that we know that the mass of the compound used for the trials is related to the temperature difference, it is correct to state therefore that " Approximately half the mass of salt produced approximately half the temperature change" (Option A)

An experiment is a technique that is carried out to support or deny a hypothesis, or to test the efficacy or probability of something that has never been done before. Experiments shed light on cause-and-effect relationships by revealing what happens when a specific element is changed.

Typically, the experimental variable is one or more of the sample attribute categories. It summarizes the differences between the test and control samples that you are studying.

The following are various types of experiments:

The totally randomized design is the most common experimental design.

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Full Question:

Ally completed part b of experiment IHT. In their second trial, they used half the mass of salt from their first trial. what trend would they expect to observe in the temperature change with respect to the mass salt they used in their first and second trials?


A) Approximately half the mass of salt produced approximately half the temperature change

B) No trend was observed

C) Approximately half the mass of salt produced approximately double the temperature change

The empirical formula of lysine is C₆H₁₄N₂.

By calculating the smallest whole number ratio from the mass percentages of a compound's constituent parts, it is possible to calculate its empirical formula.

We must first establish how many moles of each element are included in 1.50 g of lysine in order to determine the empirical formula for lysine. The mole ratios of the elements may then be calculated using these values and will match the ratio of the subscripts in the empirical formula.

We may determine how many moles of carbon and hydrogen are contained in 1.50 g of lysine by computing the mass of generated CO₂ and H₂O.

Moles of C = 2.72 g CO₂ x (1 mol CO₂ / 44.01 g CO₂) = 0.062 moles

Moles of H = 1.29 g H₂O x (2 moles H / 18.02 g H₂O) = 0.143 moles

Secondly, by being aware that lysine also generated 0.287 g of N. We can determine how many moles of N there are.

moles of N = 0.287 g N x (1 mole N / 28.02 g N) = 0.0102 moles

By dividing each element by the minimum number of moles, which is 0.0102 moles, we can now determine the ratio of the elements.

C = 0.062 moles / 0.0102 moles = 6

H = 0.12 moles / 0.0102 moles = 14

N = 0.0102 moles / 0.0102 moles = 1

Therefore, the empirical formula of lysine is C₆H₁₄N₂

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Answer:

0.283 min.

0.1 km

Explanation:

Since there are 60 seconds in 1 minute, divide the time Lauren ran by 60.

17/60 = 0.283 min.

Since there are 1000 meters in 1 kilometer, divide the distance by 1000.

100/1000 = 0.1 km

Answer:

itos6oyoyoydkgzkstgjuf

Answer:

The Greeks called these particles atomos, meaning indivisible, and the modern word “atom” is derived from this term. Democritus proposed that different types and combinations of these particles were responsible for the various forms of matter.

Explanation:

hope it helps

The idea of indivisibility of the atom upheld by Dalton was largely derived from early Greek philosophers.

John Dalton was the first scientist to begin an empirical study of atomic theory. Before this time, all that was known about the atom were largely based on the speculation of Greek philosophers.

However, one recurring theme among Greek philosophers is that atoms are indivisible. This idea that atoms are indivisible became a very strong pivot of the Dalton's theory of the atom.

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The density of rhodium metal is approximately 4.755 g/cm³.

To calculate the density of rhodium metal, we need to use the formula:

Density = (mass of the unit cell) / (volume of the unit cell)

In a face-centered cubic (FCC) unit cell, each corner atom contributes 1/8th of its volume to the unit cell, while each face-centered atom contributes its entire volume.

Given that rhodium has a face-centered cubic unit cell, the relationship between the atomic radius (r) and the edge length (a) of the unit cell can be expressed as;

a = 4r / √2

Let's calculate the edge length of the unit cell;

a = 4(134 pm) / √2

a ≈ 377.98 pm

Now, let's calculate the volume of unit cell;

Volume of the unit cell = a³

Volume of the unit cell = (377.98 pm)³

Volume of the unit cell ≈ 21,663,803.7 pm³

Next, we need to convert the volume from picometers cubed (pm³) to cubic centimeters (cm³);

1 cm³ = 10²⁴ pm³

Volume of the unit cell ≈ 21,663,803.7 pm³ × (1 cm³ / 10²⁴ pm³)

Volume of the unit cell ≈ 2.16638037 × 10⁻¹¹ cm³

The atomic mass of rhodium (Rh) is approximately 102.91 g/mol. Since there is only one rhodium atom in the unit cell, the mass of the unit cell is equal to the molar mass of rhodium (102.91 g/mol).

Now, let's calculate the density;

Density = mass of the unit cell/volume of the unit cell

Density = 102.91 g/mol / (2.16638037 × 10⁻¹¹ cm³)

Density ≈ 4.755 g/cm³

Therefore, the density of rhodium metal is approximately 4.755 g/cm³.

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Based on the given data, it appears that the reaction between hydrochloric acid (HCl) and zinc (Zn) produces a gas and a flame.

The reaction between hydrochloric acid (HCl) and zinc (Zn) is a classic example of a single displacement reaction, also known as a redox reaction. Here is a detailed explanation of the reaction:

When hydrochloric acid (HCl) comes into contact with zinc (Zn), a chemical reaction occurs. Hydrochloric acid is a strong acid, and it ionizes in water to produce hydrogen ions (H+) and chloride ions (Cl-). Zinc, on the other hand, is a metal.

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The product life cycle consists of several stages, including introduction, growth, maturity, and decline. One of the stages is incorrectly stated in the options provided.

The stages of the product life cycle are as follows:

Introduction: This is the initial stage when a product is first launched into the market. It is characterized by slow sales growth and low profitability due to high production and marketing costs.

Growth: In this stage, the product gains acceptance in the market, and sales and profits start to increase. Competitors may enter the market during this phase.

Maturity: The product reaches a saturation point in the market, with stable sales and profits. Competition is usually high, and companies often focus on product differentiation and marketing tactics to maintain market share.

Decline: This is the final stage, where sales and profits start to decline due to changing customer preferences, technological advancements, or the introduction of newer products.

Based on the provided information, it is unclear which statement is incorrect without specific options to evaluate. Please provide the options, and I'll be happy to identify the incorrect statement related to the stages of the product life cycle.

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I would like to offer some recommendations to the community group in charge of choosing the lab equipment as a student of chemistry.

Priority one should be given to selecting tools and equipment that are high-quality and long-lasting. Low-quality tools and equipment that could break easily or yield inaccurate data could compromise the quality of the investigations conducted. It's essential to spend money on trustworthy, high-quality products as a result.

Second, it's critical to consider the particular needs of the laboratory and the different types of studies that will be carried out. For instance, if organic chemistry studies are going to be done there, having an organic chemistry lab is essential.

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Answer: It is believed the major reason for the decline in amphibian species is death through disease.

Explanation:

The major reason for the decline in amphibian species is climate change.

Amphibians are organisms that can live on land and in water. They are

usually found around moist areas because they need water bodies to cool

off in order for their survival.

Climate change is characterized by an increase in temperature which

doesn't favor them as they lose more water which thereby threatens survival

and leads to their decline in the ecosystem.

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Answer:

2.5 mcg of iron

Explanation:

Density is given as;

D= m/v

Where;

m= mass

v= volume

mass= ?

volume= 6.5 ml or 0.065 dl

d= 39 mcg/dL

m= density × volume

m= 39 mcg/dL × 0.065 dl

m= 2.5 mcg of iron