What is competition?
With an explanation please:)

Answer:

because they are high reactive to the air thats why we keep them in paroffin oil

Using thermodynamics

\(\\ \sf\longmapsto Q=mc∆T\)

\(\\ \sf\longmapsto Q=0.015(328)(4184)\)

\(\\ \sf\longmapsto Q=20585.28J\)

Answer: the direction of decreasing temperature

Answer:

273.6 g

Explanation:

mass =(density)(volume)

mass=(5.7g/cm^3 )(48 cm^3)

cancel out your cm^3 and your are left with grams

multiply (5.7g)(48)=273.6 g

The mass of an object with a density of 5.7 g/cm³ and a volume of 48 cm³ is 273.6 grams.

Density is defined as the degree to which a material is packed together.

It is also defined as a mass per unit volume of the substance.

Its SI unit is kilogram per cubic meter or  gram per meter.

Density can be expressed as

Density = mass / volume

Mass =  density x volume

As given, Density = 5.7 g/cm³

                Volume = 48 cm³

So, Mass =  5.7 g/cm³ x  48 cm³

               =  273.6 grams

Thus, the mass of an object with a density of 5.7 g/cm³ and a volume of 48 cm³ is 273.6 grams.

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The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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The solutes in a solvent can be make more soluble by heating. Thus upon heating the sugar lumps forming at the bottom of the water can be easily dissolved.

Solubility of substance is the fraction of its concentration which dissolves in a solvent. Solubility is affected by several factors such as temperature, pressure, molecular weight, bond type etc.

Water is known as universal solvent because, it can dissolve almost all the inorganic and organic compounds. The hydroxide ions in water forms hydrogen bonds with compounds and easily dissolve them.

By providing thermal energy the intermolecular attraction of the solute molecules can be weekend and they easily forms bonds with the solvent molecules results in dissolution. Thus option 1 is correct.

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Answer:

B. triglyceride

Explanation:

Answer:

triglyceride becauseit is a fatty acid

Answer:

OPTION 2 SOLID>LIQUID>GAS

Explanation:

because the inter molecular forces are the strongest in the solid than in liquid and than in gas

Metallic bonding in sodium

When sodium atoms come together, the electron in the 3s atomic orbital of one sodium atom shares space with the corresponding electron on a neighboring atom to form a molecular orbital - in much the same sort of way that a covalent bond is formed.

Radiocarbon dating is used to determine the age of an object.

Radiocarbon dating is a method used to estimate the age of organic materials based on the decay of radioactive carbon-14 isotopes. This technique is widely employed in archaeology, geology, and other scientific fields. When living organisms, such as plants or animals, are alive, they maintain a ratio of carbon-14 to stable carbon-12 isotopes.

However, once they die, the carbon-14 begins to decay at a known rate. By measuring the remaining carbon-14 and comparing it to the initial ratio, scientists can calculate the time that has passed since the organism's death. This method is particularly useful for dating objects that are up to around 50,000 years old. Palynology is the study of pollen grains, taphonomy focuses on the process of decay and fossilization, and paleontology deals with the study of fossils but not specifically dating methods.

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Your experiment would not work because Taq polymerase needs a tiny bit of DNA to add bases to. Due to the lack of an enzyme that could add new nucleotide bases, your process would not succeed.

The primers are absolutely necessary for a PCR reaction to work. The RNA primers must anneal before the heat-resistant DNA polymerases may start replicating DNA. The DNA polymerase cannot work without the primers, and as a result, no product will be produced.

DNA polymerase requires a primer on which it may add the first nucleotide since it can only add a nucleotide onto an already-existing 3'-OH group. This prerequisite allows the researcher to identify a particular area of the template sequence that they want to amplify.

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All the oxides and hydroxides of metals are basic in nature.

Magnesium oxide is also basic in nature and is a water insoluble base.

When a dilute acid reacts with a base it forms salt and water because the acidity and basicity of the acid and base respectively neutralise each other.This process is known as neutralisation reaction.

When MgO reacts with HCl it forms MgCl2 and water.

In equation form

MgO + 2HCl — MgCl² + H2O

The value of ΔH for the reaction CO(g) + H₂(g) + O₂(g) → CO₂(g) + H₂O(g) is -1272 kJ.

To calculate the enthalpy change (ΔH) for the given reaction, we can use Hess's law, which states that the overall enthalpy change of a reaction is equal to the sum of the enthalpy changes of the individual reactions involved.

Given the enthalpy changes:

1. 2 C(s) + O₂(g) → 2 CO(g)... ∆H = -222 kJ

2. C(s) + O₂(g) → CO₂(g)... ∆H = -394 kJ

3. 2 H₂(g) + O₂(g) → 2 H₂O(g)... ∆H = -484 kJ

We need to manipulate these reactions to obtain the desired reaction:

1. Reverse reaction 2: CO₂(g) → C(s) + O₂(g)... ∆H = +394 kJ

2. Multiply reaction 2 by 2 to balance carbon atoms: 2 CO₂(g) → 2 C(s) + 2 O₂(g)... ∆H = -788 kJ

3. Leave reaction 3 unchanged: 2 H₂(g) + O₂(g) → 2 H₂O(g)... ∆H = -484 kJ

By adding reactions 2 and 3, we obtain the desired reaction:

CO(g) + H₂(g) + O₂(g) → CO₂(g) + H₂O(g)... ∆H = -788 kJ + (-484 kJ) = -1272 kJ

Therefore, the value of ΔH for the given reaction is -1272 kJ.

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In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶, using the notation explained below

Explanation:

hope it help u

The molar flow rate of hydrogen is approximately 0.0003884 mol/s.

To calculate the molar flow rate, we need to convert the volume flow rate from nanoliters per minute (nlpm) to moles per second (mol/s). Here's how you can do it:

Given:

Volume flow rate = 8.7 nlpm

Step 1: Convert volume flow rate to liters per second:

Volume flow rate (L/s) = Volume flow rate (nlpm) / 1000

Volume flow rate (L/s) = 8.7 nlpm / 1000 = 0.0087 L/s

Step 2: Convert volume flow rate to moles per second using the ideal gas law:

Molar flow rate (mol/s) = Volume flow rate (L/s) / molar volume (L/mol)

The molar volume depends on the conditions of temperature and pressure. Let's assume standard temperature and pressure (STP) conditions:

Standard temperature (T) = 273.15 K

Standard pressure (P) = 1 atm

At STP, the molar volume of an ideal gas is approximately 22.4 L/mol.

Molar flow rate (mol/s) = 0.0087 L/s / 22.4 L/mol

Molar flow rate (mol/s) ≈ 0.0003884 mol/s

Therefore, the molar flow rate of hydrogen is approximately 0.0003884 mol/s.

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• given that volume = 230ml ,therefore mass of water = 230g

• ∆T = Tfinal-Tinitial =30.5-22.9 = 7.6°C

• Specific heat capacity of water , C= 4.184J/°C*g

• Therefore , q = mass* C * ∆T

= 230 * 4.184 * 7.6

=7313.6 J /1000

q= 7.314KJ

• given : mass of methanol burned = Mass F-Mass initial

=(2.51-1.65) = 0.86 g

• So ,moles of methanol , n = mass methanol/Mol. mass methanol

= 0.86g/32.04g/mol

=0.027 moles

• Finally , ∆H = q/n

= 7.314KJ / 0.027mol

=270.85KJ/mol

• However, this is an exorthemic reaction, heat is lost through combustion, our molar enthalpy should be negative.

Answer:

Next time you're just recently out of a serious relationship, and you're craving some sort of intimacy and comfort, feel confident that a rebound might actually be a good thing as long as it's an upgrade, either physically, emotionally, a fun date, or even just finding a way to shift your mentality toward viewing. so what im saying is if your happy in that relationship stay in it and if he or she becomes a meany leave it its not goo for your health

Answer: Permeable

Explanation:

The cell membrane is the outermost covering around the animal cells but it is also surrounded by the cell wall in the case of the plant cells. The cell membrane plays an important role in the cell that is it allows the entry of only certain substances like ions, molecules, atoms within the cell and only allows the exist of certain substances out of the cell. This is the selective permeability of the membrane. This process occurs through osmosis in which the desired molecules move from higher to lower concentration. Also it helps in maintaining the balance of nutrients and water within the cell. This helps in getting rid of the waste outside the cell. It provides the protection to the organelles and cytoplasm in the cell against the external injury caused by the external stressor outside the cell like water, pressure, pathogen, and others.

The nitryl chloride molecule (NO₂Cl) consists of a central nitrogen atom bonded to two oxygen atoms and a chlorine atom, with the double bond delocalized between one oxygen and the nitrogen atom in resonance. The Lewis structure is given below.

The nitryl chloride molecule (NO₂Cl) can exhibit resonance, resulting in multiple equivalent resonance structures. Here are the possible resonance forms for NO₂Cl:

Resonance Form 1:

Cl

|

O = N - O

Resonance Form 2:

Cl

|

O - N = O

These two resonance structures represent the different arrangements of the double bond between the nitrogen and oxygen atoms. The actual structure of nitryl chloride is a hybrid of these resonance forms, with the double bond delocalized or spread out over both nitrogen and oxygen atoms.

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In order for a titration to be effective, the reaction must produce a precipitate. The correct answer is option B, "reaction must produce a precipitate."

For a titration to be effective, the reaction must be stoichiometric, quantitative, and rapid. A stoichiometric reaction is one in which the amount of reactants is proportional to the amount of products.

A quantitative reaction is one in which all the reactants are consumed, leaving no excess. A rapid reaction is one that occurs quickly and does not take a long time to complete.

However, a reaction producing a precipitate is not necessary for the titration to be effective. Hence option B is correct.

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Answer:

Basically, a variable is any factor that can be controlled, changed, or measured in an experiment. It's anything that can be changed in the experiment.

Explanation:

Scientific experiments have several types of variables. The independent and dependent variables are the ones usually plotted on a chart or graph, but there are other types of variables you may encounter. The presence/absence of the chemical is the independent variable. The health of the (ex:)rat (whether it lives and can reproduce) is the dependent variable.

Answer:

Taking into account definition of reaction stoichiometry, after 63.8 g aluminum nitrite and 52.5 g ammonium chloride react completely, there are present a mass of 43.66 grams of AlCl₃, 27.50 grams of N₂, 35.36 grams of H₂O and 9.78 grams of Al(NO₂)₃.

In first place, the balanced reaction is:

Al(NO₂)₃(aq) + 3 NH₄Cl(aq) → AlCl₃(aq) + 3 N₂(g) + 6 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 165 grams of Al(NO₂)₃ reacts with 160.35 grams of NH₄Cl, 63.8 grams of Al(NO₂)₃ reacts with how much mass of NH₄Cl?

mass of NH₄Cl= (63.8 grams of Al(NO₂)₃× 160.35 grams of NH₄Cl)÷165 grams of Al(NO₂)₃

mass of NH₄Cl= 62.002 grams

But 62.002 grams of NH₄Cl are not available, 52.5 grams are available. Since you have less mass than you need to react with 63.8 grams of Al(NO₂)₃, NH₄Cl will be the limiting reagent.

Considering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 160.35 grams of NH₄Cl form 133.35 grams of AlCl₃, 52.5 grams of NH₄Cl form how much mass of AlCl₃?

mass of AlCl₃= (52.5 grams of NH₄Cl× 133.35 grams of AlCl₃)÷ 160.35 grams of NH₄Cl

mass of AlCl₃= 43.66 grams

The following rule of three can be applied: if by reaction stoichiometry 160.35 grams of NH₄Cl form 84 grams of N₂, 52.5 grams of NH₄Cl form how much mass of N₂?

mass of N₂= (52.5 grams of NH₄Cl× 84 grams of N₂)÷ 160.35 grams of NH₄Cl

mass of N₂= 27.50 grams

The following rule of three can be applied: if by reaction stoichiometry 160.35 grams of NH₄Cl form 108 grams of H₂O, 52.5 grams of NH₄Cl form how much mass of H₂O?

mass of H₂O= (52.5 grams of NH₄Cl× 108 grams of H₂O)÷ 160.35 grams of NH₄Cl

mass of H₂O= 35.36 grams

The following rule of three can be applied: if by stoichiometry 160.35 grams of NH₄Cl reacts with 165 grams of Al(NO₂)₃, 52.5 grams of NH₄Cl reacts with how much mass of Al(NO₂)₃?

mass of  Al(NO₂)₃= (52.5 grams of NH₄Cl× 165 grams of Al(NO₂)₃)÷160.35 grams of NH₄Cl

mass of  Al(NO₂)₃= 54.02 grams

If 63.8 grams of the compound are present, then the excess mass can be calculated as:

excess mass= 63.8 grams -54.02 grams

excess mass= 9.78 grams

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The most commonly used metal catalyst in catalytic converters is platinum (Pt) among the other possible metals that could also be used in this regard.

Through a sequence of chemical reactions, carbon monoxide (CO) and nitrogen oxides (NOx) produced by an automobile engine are transformed into less hazardous compounds in a catalytic converter.

We know that the catalytic inverter can be able to convert carbon monoxide into carbon dioxide and can also be able to convert nitrogen monoxide to nitrogen dioxide.

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This reaction is catalyzed by an enzyme called a hydrolase, and it takes place in a matrix.

By converting l-arginine to l-ornithine and urea, the ureohydrolase arginase, an enzyme that contains manganese, catalyzes the last stage in the urea cycle to get rid of harmful ammonia.

It is changed by the enzyme arginase into L-ornithine, a building block for polyamines and urea, both of which are necessary for the urea cycle. Arg is a precursor of creatine, which is responsible for Arg catabolism, the production of agmatine, and the synthesis of proteins. Creatine is crucial for the energy metabolism of muscle, neuron, and testicles.

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No, spoiling milk is not a chemical change. Spoiling milk is a physical change, which is a change in the state or appearance of a substance without changing its chemical composition.

When milk spoils, it is still composed of the same molecules, but its physical properties (such as taste, smell, and texture) have changed. Spoiling milk is caused by the growth of microorganisms, such as bacteria, which break down milk proteins and fats, causing changes in the milk's appearance, taste, and smell.  In the case of milk, spoiling is the result of the growth of bacteria, which is a physical change.  A physical change is a change in the physical state or appearance of a substance without any change in the chemical composition or identity of the substance.

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Answer:

Temperature and pressure are the two factors which are responsible for change in state of matter.

Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other. ... In the solid the particles vibrate in place. Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container.

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