For a given substance that exhibits liquid-crystalline properties, the transition from solid to liquid-crystal state occurs ________.

A soluble impurity usually has two effects on the melting point of a compound: an increase in melting point range and a decrease in melting point.

In chemistry, there are two types of impurities: soluble and insoluble.

Soluble impurities are those that dissolve in water quickly and also have a significant impact on the chemical properties of a compound such as a significant increase or decrease in the melting point and boiling point.

For example, salt, milk, and sugar compounds are soluble impurities.

Similarly, insoluble impurities remain undissolved when mixed in water and are also known as suspended impurities.

Examples of insoluble impurities are sand, oil, chalk, rocks, pebbles, etc.

If you need to learn more about compounds click here:

https://brainly.com/question/26487468

#SPJ4

Lightning is categorized as plasma because it has extremely high levels of energy.

When the electrons are freed from their host atoms for a short time, due to high temperatures, it is plasma. An electrical discharge consisting of moving electrons and ions, is lightning. Lightning strikes create plasma via a very strong jolt of electricity.

By the passage of electricity through a gas, the plasma was created. An electrical discharge through air and it ionizes the atoms when this happens. The electrons from the atoms strips and leaves positively charged ions in the gas, is lightning.

Lightning as an example of plasma present at Earth's surface. Plasma temperatures approaches 30000 K and electron densities may exceed 10²⁴ m−³.

To learn more about plasma and lightening,

brainly.com/question/18207038

#SPJ1

If the energy of the photon of light emitted from a hydrogen atom has a magnitude of 4.084 x 10-19 j, and the electron starts at level n = 4 then  final state of the electron is n=2

Here given data is energy of the photon of light emitted from a hydrogen atom has a magnitude of 4.084 x 10-19 j and electron starts at level n = 4 then from ground state to excited state n=2 final state are seen from given data  energy of the photon = E= -2.18×10⁻¹⁸J (1/nf²-1/ni²) using this formula ans is to be 0.235 and this energy is n=2 are seen thats why final state of electron are seen in n=2

Know more about energy of the photon

https://brainly.com/question/28496607

#SPJ4

A chemist adds a chemical to pure water and there is a 100-fold increase in the concentration of hydrogen ions. the new ph value is 5.

The pH of a solution is determined by the concentration of hydrogen ions in that solution. The pH value is the logarithmic value of the inverse of hydrogen ion activity. Because the concentration of hydrogen ions is frequently very low, ion activity is considered to be equal to the concentration of hydrogen ions.

The logarithmic value of the inverse of hydrogen ion activity is the pH value. Because the concentration of hydrogen ions is frequently very low, ion activity is assumed to be equal to the concentration of hydrogen ions. The pH is then the logarithm of the inverse of the concentration of hydrogen ions.

Learn more about the concentration of hydrogen ions here:-

https://brainly.com/question/3819378

#SPJ4

The mass of fuel the airplane taken on is 1.81 × 10⁵ g or 1.81 × 10² kg.

V(fuel) = 221 l

V(fuel) = 221 l × 1000 ml/l

V(fuel) = 221 000 ml = 2.21 × 10⁵ ml; volume of the fuel

d(fuel) = 0.821 g/ml; density of the fuel

m(fuel) = V(fuel) × V(fuel)

m(fuel) = 2.21 × 10⁵ ml × 0.821 g/ml

m(fuel) = 1.81 × 10⁵ g; mass of the fuel

m(fuel) = 1.81 × 10⁵ g × 10⁻³ kg/g

m(fuel) = 1.81 × 10² kg

Density is a measure of mass per unit of volume (in this example grams per milliliter).

More about density: brainly.com/question/1354972

#SPJ4

An unknown substance has a density of 2.5g/ml. Density is a physical property because we can find it for a substance without changing the identity of the substance. The correct option is B.

Physical properties are those properties that can be seen by seeing the matter of the object. Density is a physical property. It does not depend upon the chemical composition of the object.

Thus, the correct option is B. Density is a physical property because we can find it for a substance without changing the identity of the substance.

To learn more about physical properties, refer to the link:

https://brainly.com/question/2217499

#SPJ4

The density of the gold will be 2.82 g/ [tex]cm^3[/tex].

The density of a substance is the ratio of the mass of the substance and its volume.

Mathematically, density = mass/volume

In this case; mass of gold = 1.5 kg or 1500 g, height of gold = 8.1 cm

Being a perfect 8.1 cm tall means the gold is a cube.

Volume of a cube = [tex]l^3[/tex]

Volume of gold = 8.1 x 8.1 x 8.1

                           = 531.441 [tex]cm^3[/tex]

Thus; density of gold = 1500/531.441

                                   = 2.82 g/ [tex]cm^3[/tex]

The density of the gold is, therefore, 2.82 g/ [tex]cm^3[/tex].

More on density of substances can be found here: https://brainly.com/question/15164682

#SPJ1

Answer:Cell membrane

Explanation:Plant cells don’t have cell wall

Answer:

The answers are is that they are likely lead and the substance will sink in water.

Explanation:

First of you have the formula Density=Mass/volume

I substituted 51.4 for mass and 4.5 for volume and divided it to get 11.4. According to the table Lead has 11.4 density. Then once you got that you redo the formula and the substance will most likely sink because it has more than 1 g/cm^3.

Hope this helps!

Also I did it on USA Test Prep c:

The molecular weight of ethanol, in the alcohol in alcoholic beverage, is 46.1 amu.

What is ethanol?

Ethanol is a substance derived from organic compounds. With the chemical formula C2H6O, it is an alcohol. EtOH, its chemical name, is also occasionally abbreviated as CH3CH2OH or C2H5OH. Alcohol is a highly flammable, colorless liquid with a strong wine-like odor and astringent flavor.

Pharmaceuticals, polymers, lacquers, polishes, plasticizers, and cosmetics are all made with ethanol. Ethanol is used in medicine as an antidote for methanol or ethylene glycol intoxication as well as a topical anti-infective.

To learn more about Ethanol click the given link

https://brainly.com/question/5750283

#SPJ4

Option A. Hydrogen Ions

The dissolution of carbon dioxide in the oceans produce hydrogen ions as when carbon dioxide is dissolved in the ocean it leads to Ocean Acidification. This Acidification produces the hydronium ions as more acidic nature implies higher concentrations of hydrogen ions.

Carbon dioxide is a gas that readily dissolves in water to give Carbonic Acid , bicarbonate ions and carbonate ions , all of which are acidic in nature. This lowers the pH of the ocean making the waters more acidic. Therefore the acidity of oceans is largely dependent on carbon compounds and the amount of Carbon dioxide.

The reaction of Carbon dioxide with water to give carbonic acid :

                                CO2 + H2O → H2CO3

(To know more about ocean acidification : https://brainly.com/question/7604502 )

The statement that correctly identifies the type of mixture is that homogeneous mixtures have parts that are distributed evenly. The correct option is c.

A homogeneous mixture is sole in which the composition is consistent throughout the solution.

Since the dissolved salt is evenly distributed throughout the salt water sample, the salt water described as an illustration is homogeneous.

The statement that accurately defines the type of mixture is that homogeneous mixtures have evenly distributed parts.

Thus, the correct option is c.

For more details regarding homogenous mixture, visit:

https://brainly.com/question/24898889

#SPJ1

Rocks are wedged apart by plant roots that grow through fissures in quest of water and minerals. Additionally, some fungus, lichens, and plants create acids and other substances that help the chemical weathering of earth minerals. Root systems restrain by adhering to and stabilizing rocks and soils.

How do plants promote mechanical and chemical weathering?

Chemical and mechanical weathering can be brought on by plants. Plants' roots penetrate rocks and cause them to fracture as a result of mechanical weathering. It may also occur on sidewalks or in streets. Plants produce chemical weathering by releasing acids or other chemicals through their roots onto rocks, causing the rocks to fracture and develop fissures.Chemical weathering is also brought on by animals and plants. Plant roots draw components from the minerals as they absorb nutrition. The rock undergoes a chemical alteration as a result.

To learn more about Chemical and mechanical weathering from given link:

https://brainly.com/question/1130406

#SPJ4

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

Learn more about leaves:https://brainly.com/question/12539285

#SPJ1

MCQs as follows-

chlorophyll is the light-absorbing green coloured pigment that begins the process of photosynthesis, and Chloroplast is a membrane-bound organelle in green plant and algal cells that carries out photosynthesis and generates ATP for the use of plants.

To know more about locomotion visit :

https://brainly.com/question/13343069

#SPJ9

A solution has been prepared with 100 g of drug in 1,000 ml solution mg of drug are in 120 ml of the solution is 12000 mg

1,000 ml solution requires =100g of drug;

1 ml solution requires =100÷1000 g of drug;

                                   = 0.1g of drug;

120 ml solution requires =0.1×120g of drug;

                                       = 12g of drug;

                                        = 12000 mg of drug;

The present clinical use of H2O2 continues to be constrained to the elimination of microbial infection and every now and then hemostasis, better information in the direction of the sterilization ability and cell behavior regulatory characteristic of H2O2 inside wounds will decorate the ability to exogenously augment and control recovery.

To learn more about solution this; visit: https://brainly.com/question/4392097

#SPJ4

The right answer is given in the picture.

To find the formula of an ionic compound, first, identify the cation and write down its symbol and charge. Then identify the anion and note its sign and charge. Finally, the two ions combine to form an electrically neutral compound.

Particle diagram Elements and compounds can be represented using particle diagrams. This is a box with colored spheres drawn to represent atoms or molecules. These diagrams can represent elements and compounds and their molecular composition by the types of spheres and how they are connected. Particle diagrams are used to show particles, atoms, or molecules within matter. A diagram showing particles in a substance.

Learn more about Particle diagrams here:-https://brainly.com/question/3806655

#SPJ1

Glutamine is the nitrogen source of the carbamoyl phosphate in pyrimidine synthesis.

Carbamoyl Phosphate generates when enzyme bound carbamate reacts with second ATP, with release of free enzyme, and ADP.

The atoms of pyrimidine ring comes from the aspartic acid and carbamoyl phosphate (CP). The first step of the pathway is the formation of former or latter molecule. The enzyme named carbamoyl phosphate synthetase II catalyses the latter molecule. Glutamine is used by this enzyme as the nitrogen source.  

N-acetylglutamate activates this mitochondrial enzyme carbomoyl phosphate synthetase but it is not an allosteric activator. It is located in the cytoplasm.

CPS II catalyzes the synthesis of carbamoyl phosphate which is ATP dependent synthesis from glutamine or ammonia.

To learn more about pyrimidine synthesis,

brainly.com/question/16256754

#SPJ4

In this compound, the proportion of carbon atoms to oxygen atoms is 12: 11.

What distinguishes an atom of carbon as such?

The nucleus of a carbon atom is made up of six protons and six neutrons, and it is encased in six electrons. According to quantum physics, the first two electrons must occupy the innermost atomic orbital, while the wavefunctions of the following four electrons only partially fill the second standard and three second principal orbitals.

How are atoms located in a compound?

Calculate the element's molar mass using the periodic table. To determine the atoms, the number of moles, divide the given mass in grams by the molar mass. To get the number of atoms, multiply the number of moles by Avogadro's number.

To learn more about oxygen atoms click on the link below:

https://brainly.com/question/28108680

#SPJ1

Adding different amounts of contaminated water to each tube rather than diluting between tubes. Frequently, county health agencies will assist you with nitrate or bacteria testing. If not, you can ask a state-approved laboratory to test your water. Call the Safe Drinking Water Hotline at 800-426-4791 to locate one in your region.

Tests of the water's quality will reveal information on the condition of the river. The quality of the water might fluctuate over time, and this can be noticed by testing tubes it repeatedly. Temperature, pH, turbidity, salinity, nitrates, and phosphates are just a few of the variables that can be measured.

To learn more about water, click here.

https://brainly.com/question/16630851

#SPJ4

According to Rutherford's nuclear theory, the number of negatively charged particles outside the nucleus is equal to the number of positively charged protons inside it.

What is Rutherford's nuclear theory?

According to the Rutherford atomic theory, an atom is made up of a compact, dense, positively charged nucleus that is around by smaller, negatively charged particles called electrons. It explains the atomic model, according to which an atom's mass is concentrated in its nucleus, around which the electrons, or negatively charged particles, move.

In accordance with Rutherford's nuclear theory, an oxygen atom has 8 protons and 8 electrons, whereas a calcium atom cannot have 20 protons and 20 electrons. This is because the number of negatively charged particles outside the nucleus is equal to the number of positively charged particles inside the nucleus.

Thus, the number of negatively charged electrons outside the nucleus is equal to the number of positively charged protons inside the same.

To learn more about Rutherford's nuclear theory from the given link below,

https://brainly.com/question/10401308

#SPJ4

When the carboxyl group of fatty acids reacts in a dehydration synthesis reaction with the hydroxide group of glycerol, fats, or oils are formed.

Fats and oils are made up of fatty acids and glycerol.

A fatty acid has a carboxyl group attached to a long chain of carbon atoms.

Based on the presence or absence of double bonds, fatty acids are of two types, saturated (without double bond) or unsaturated (with one or more C=C double bonds), as shown in the adjoining diagram.

Glycerol is chemically trihydroxy propane. It has three hydroxyl groups.

When the carboxylic group of fatty reacts in a dehydration synthesis reaction with the hydroxyl group of glycerol, fats or oils are formed. When these groups react, an ester bond is formed.

This reaction is illustrated in the adjoining diagram.

To know more about "fats and oils", refer to the following links:

https://brainly.com/question/1438643?referrer=searchResults

https://brainly.com/question/11587174?referrer=searchResults

#SPJ4

Ka for HX is 1.12×10⁻⁹.

Balanced chemical equation for the reaction of sodium hydroxide (NaOH) with weak acid (HX):

NaOH + HX ⇄ NaX + H2O

n(NaOH) = 0.10 mol; amount of sodium hydroxide

V = 1.00 L; volume of the solution

c(HX) = (0.3 mol - 0.1 mol) / 1.00 L

c(HX) = 0.2 M; concentration of a weak acid

c(NaX) = 0.1 M; concentration of a salt

pH = 8.65

Henderson–Hasselbalch equation: pH = pKa + log(cs/ck).

8.65 = pKa + log(0.1 M / 0.2 M)

8.65 = pKa - 0.30

pKa = 8.95

Ka = 10∧-8.95

Ka = 1.12×10⁻⁹; the acid dissociation constant

Buffer is a solution that can resist pH change upon the addition of an acidic or basic components and it is able to neutralize small amounts of added acid or base, pH of the solution is relatively stable.

This buffer is example of weak acid (HX) and its conjugate base (X⁻).

More about buffer: brainly.com/question/4177791

#SPJ4

Balanced equation for the precipitation reaction between potassium phosphate and magnesium sulfate:

2K₃PO₄(aq) + 3MgSO₄ → Mg₃(PO₄)₂ + 3K₂SO₄

K₃PO₄ is the salt potassium phosphate, it is soluble in water

MgSO₄ is the salt magnesium sulfate

Mg₃(PO₄)₂ is the insoluble salt magnesium phosphate, it forms precipate in this reaction

K₂SO₄ is the salt potassium sulphate, it is soluble in water

In a precipitation reaction substances react to form one or more solid products (in this example magnesium phosphate).

This chemical reaction is double displacement reaction - cations and anions of the two reactants switch places and form two new compounds.

More about chemical reaction: brainly.com/question/6876669

#SPJ4

1.08 x 10²¹ molecules of methionine are present for every 1.0 mole of glycine in the sample.

Given data -

Glycine in the sample = 1.0 mole

Avogadro's number = 1.8 x 10⁻³ moles (we know)

To find the number of molecules of methionine , multiply the molar ratio by the Avogadro's number.

Number of molecules = Avogadro's number x molar ratio

                                     = (1.8 x 10⁻³ moles) x (6.02 x 10²³ molecules/mole)

                                     = 1.08 x 10²¹

Methionine is an essential amino acids for human. For the growth of new blood vessels and for he supplementation, it is an important  amino acid. Too much methionine reslts in the damage to the brain and might be fatal.

Glycine is also an amino acid which has only one single hydrogen as its side chain. It is used in the treatment of some rare metabolic disorders and schizoprenia, stroke, etc.

Glycine is responsible to reduce the levels of methionine in the blood. Glycine is considered a precursor for many necessary metabolites such as purines, glutathione, creatinine and porphyrins. It acts as a neurotransmitter in CNS.

To learn more about methionine and glycine amino acid, brainly.com/question/21881188

#SPJ4

Answer:

A liquid has a defined volume, but can change its shape. Water is an example of a liquid. A gas lacks either a defined shape or volume. Water vapor and air are examples of gas.

...

Examples of Solids

Brick.Coin.Iron bar.Banana.Rock.Sand.Glass (no, it does not flow)Aluminum foil.

Florence is only able to find 0. 015 m aqueous ki/i2 on the reagent cart, so they perform a dilution by combining 10 ml of water and 10 ml of the available reagent. They now have 0. 0075 m aqueous ki/i2 which can be used at station there is no difference in the chemical composition of the solution because water was already present in the solution.

Florence is a type of flask used as an item of laboratory glassware and is named after the city Florence. here Florence flask is only able to find 0. 015 m aqueous Ki/i2 on the reagent cart they perform a dilution by combining 10 ml of water and 10 ml of the available reagent They now have 0. 0075 m aqueous Ki/i2 which can be used at station there is no difference  because water was already present in the solution water is only present on the reagent cart.

Know more about Florence

https://brainly.com/question/28499549

#SPJ4

Answer:

Explanation:

To determine the mass of each compound, we need to convert them into units of moles first. We use avogadros number to do this and use the molar mass of the compounds to convert to mass.

3.01 × 1023 molecules H2O ( 1 mole / 6.022x10^23 kg) (18.02 g / 1 mole) = 9.01 g

8.32 × 1020 formula units CaBr2 ( 1 mole / 6.022x10^23 kg) (199.89 g / 1 mole) = 0.28 g

1.93 × 1026 molecules XeF6 ( 1 mole / 6.022x10^23 kg) (245.28 g / 1 mole) = 78610.16 g

Most body water intake is from drinking, whereas most body water lost is via ; urine.

Where is most of the water of the body found ?

Most body water is found within the extracellular fluid. the 2 major forces that result in the movement of water are fluid pressure and osmotic pressure. In ECF , the main cation is potassium, and therefore the major anions are chloride and bicarbonate.

How does water get distributed within the body?

The water we drink is absorbed by the intestines, and circulated throughout the body within the form of body fluids such as blood. These perform various functions that keep us alive. They deliver oxygen and nutrients to the cells, and remove waste materials, which are then eliminated with urination.

Learn more about distribution of water in body:

brainly.com/question/24197797

#SPJ4