We know that organisms pass traits onto their offspring through reproduction. So how is it
possible that a new trait could ever appear in a population? Wouldn't a trait have to already
exist in the population?

The matter in this series of images is going through a chemical change, because they are changing their form and making new substance.

Chemical change is defined as a change of materials into another, new materials with different properties and one or more than one materials are formed during the chemical reaction.

There are basically five types of chemical reaction.

Thus, the  matter in this series of images is going through a chemical change, because they are changing their form and making new substance.

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In a liquid-liquid extraction (LLE) system with loratadine and pseudoephedrine sulfate, the choice of organic and aqueous phases is crucial for efficient separation.

Loratadine is a non-polar compound, while pseudoephedrine sulfate is more polar due to the presence of a sulfate group. To achieve effective separation, we need to choose a suitable organic phase and aqueous phase.

For the organic phase, a non-polar solvent such as diethyl ether, ethyl acetate, or chloroform can be used. These solvents have good solubility for loratadine. The non-polar organic phase will extract loratadine from the mixture, allowing for separation from the aqueous phase.

As for the aqueous phase, we need to choose a polar solvent that will selectively extract pseudoephedrine sulfate. Aqueous solutions of acids like hydrochloric acid (HCl) or sulfuric acid (H2SO4) can be used. The acidic conditions protonate the pseudoephedrine sulfate, making it more soluble in the aqueous phase.

To perform the extraction, the mixture of loratadine and pseudoephedrine sulfate is added to the LLE system consisting of the organic phase (non-polar solvent) and the aqueous phase (acidic solution). The mixture is then vigorously shaken to ensure thorough mixing and extraction.

After shaking, the phases are allowed to separate, with the more dense aqueous phase settling at the bottom and the less dense organic phase on top. The layers can be carefully separated, and each phase can be further processed to isolate the desired compounds.

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Answer:

How do contrasting colors affect the quality of a painting?

Explanation:

Just trust me

What was the medical or physiological cause of the victim’s death? this questions cannot be answered by science. Therefore, option A is correct.

The term "science" is defined as the systematic study of observation, experimentation, and the testing of theories against the evidence obtained and the explanations and predictions about the universe.

The study of science is very important because in day to day life science plays the vital role. It is the process of learning about the natural world by observation and experimentation.

What was the medical or physiological cause of the victim’s death? this questions cannot be answered by science. Because it is related to the physiological study and the other three questions are related to the science.

Thus, option A is correct.

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Your question is incomplete, probably your question was

Which one of the following questions cannot be answered by scientific evidence?

A What was the medical or physiological cause of the victim’s death?

B Why was the victim stabbed many times?

C Is taking cheek scrapings a safe way to collect DNA samples?

D Do all identical twins have exactly the same DNA profile? Option 1​

Answer:

0.04

Explanation:

Speed=Wavelength×Frequency

or, Wavelength=speed/frequency

so, wavelength=4.0/100= 0.04

a) The optical rotation of the sample would likely be affected by the presence of the (1r)-( )-camphor, as it would change the overall chirality of the mixture. The exact effect would depend on the specific concentrations of the various stereoisomers present.

b) The % distribution calculated for the isoborneol-borneol mixture would also be affected by the presence of the (1r)-( )-camphor. As the mixture is contaminated by a small amount of (1r)-( )-camphor it would change the ratio of isoborneol to borneol, which would lead to an incorrect calculation of the % distribution.

The presence of camphor, particularly if it is not completely reduced, can have a significant impact on the properties and characterization of the isoborneol-borneol mixture. As mentioned earlier, it can affect the optical rotation and the percentage distribution of the mixture, leading to inaccurate results. Additionally, camphor can also affect the purity and yield of the final product, and may interfere with downstream applications or processes that use the isoborneol-borneol mixture.

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Answer:

9, 10, 12

Explanation:

anything greater than pH 7 is basic

The free radical reaction step mechanism of isobutyronitrile (also known as isobutanenitrile) involves the following steps:

Initiation:

Initiation occurs when a radical initiator, typically a peroxide or a radical-generating agent, initiates the formation of free radicals.

For example, a common initiator is a peroxide such as benzoyl peroxide (BPO), which can decompose upon heating to form benzoyl radicals (•C6H5COO•).

Propagation:

The propagation steps involve the generation and consumption of free radicals, leading to the formation of new radicals and the continuation of the reaction.

In the case of isobutyronitrile, a possible propagation step can be:

•C6H5COO• + CH3CH(CH3)CN → •C6H5COOC(CH3)2CH2CN

Termination:

Termination steps occur when free radicals combine and eliminate radicals from the reaction system, leading to the termination of the reaction.

Various termination steps can take place, such as:

•C6H5COO• + •C6H5COO• → C6H5COOC6H5COO

•C6H5COO• + •CH3CH(CH3)CN → C6H5COOCH(CH3)2CH2CN

It's important to note that the above mechanism is a simplified representation, and the actual mechanism may involve additional intermediate steps and side reactions. Additionally, the specific reaction conditions and factors can influence the exact mechanism and reaction pathway.

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I THINK 18 OR 21 I AM SORRY IF I AM WRONG BRO

Answer:

An atom of an element always contain three fundamental particles called electrons(e-) , neutron ( n zero) and protons ( p+)

An atom of an element always contains a proton, electron and neutron.

Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus. Only the most common type of hydrogen is neutron-free. Every solid, liquid, gas, and plasma is made up of atoms that are either neutral or ionized.

But when it comes to the word atom, we must go back to 400 B.C. Greece. And Democritus, a brilliant philosopher, proposed the Greek word atomos, which means uncuttable.

Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus.

Thus, An atom of an element always contains a proton, electron and neutron.

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The effective multiplication factor k=0.94.

What is reactivity ?

Being responsive as a trait or state. Chemistry. the resemblance of an atom's, molecule's, or radical's ability to interact chemically with another atom, molecule, or substance.

What is reactor?

Reactor: A vessel or equipment used in chemical engineering to conduct chemical reactions for research or production.

(a) The effective multiplication factor  k=0.94

The reactivity \rho = \frac{k-1}{k}=-0.0638.

(b) For the reactor to be critical, k = 1, which means the core reactivity should be increased to make it critical.

Therefore, the effective multiplication factor k=0.94.

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Answer:

I believe C

Explanation:

For every mole of calcium chloride you get one mole of Ca2+ and 2 moles of chloride. So the molarity of calcium 2+ is 1.5 M and the molarity of the chloride is 3.0 M

What is Molarity?

Since most reactions take place in solutions, it's critical to comprehend how the substance's concentration is expressed in a solution. The quantity of compounds in solution can be determined in a variety of methods.

The concentration of salts in the alkaline solution is represented by its molarity (M). The amount of fundamental substance needed to prepare the solution rises as molarity does. Molarity is crucial for the growth of strength.

The number of moles of dissolved solute per litre of solution is the definition of molarity, a unit of concentration. Molarity is defined as the number of millimoles per millilitre of solution by dividing the number of moles and the volume by 1000.

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Answer:

Option B is the correct answer

Cobalt (III) carbonate

Explanation:

The chemical name of CO₂(CO₃)₃ is Cobalt (III) carbonate

The overall reaction involves the nucleophilic substitution of the alkyl halide with sodium azide, followed by the reduction of the alkyl azide to form an amine.

R-X + NaN3 → R-N3 → R-NH2

The reaction you are describing is the synthesis of an alkyl azide and its subsequent reduction to form an amine. This reaction is commonly referred to as the "Staudinger reaction."

The mechanism for this reaction involves two main steps: the nucleophilic substitution of the alkyl halide with sodium azide to form an alkyl azide, followed by the reduction of the alkyl azide to form an amine.

Here is the mechanism for the nucleophilic substitution step:

Nucleophilic substitution of alkyl halide with sodium azide

The alkyl halide (R-X) is treated with sodium azide (NaN3) in a polar aprotic solvent such as dimethylformamide (DMF).

The lone pair of electrons on the nitrogen in the azide ion (N3-) attacks the electrophilic carbon in the alkyl halide, breaking the carbon-halogen bond.

The leaving group (X) departs, taking its pair of electrons with it and forming a halide ion.

The intermediate formed is an alkyl azide (R-N3), which is highly reactive and can undergo a variety of reactions.

Key intermediate: Alkyl azide (R-N3)

Product: The product of the nucleophilic substitution step is an alkyl azide (R-N3).

Here is a simplified diagram of the nucleophilic substitution step:

R-X + NaN3 → R-N3 + NaX

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Answer:

The Earth's Crust is like the skin of an apple. It is very thin in comparison to the other three layers. The crust is only about 3-5 miles (8 kilometers) thick under the oceans(oceanic crust) and about 25 miles (32 kilometers) thick under the continents (continental crust).

Explanation:

you butt is thick in kilometers

;)

Answer:

C. decrease

Explanation:

Price increases on goods in the economy signal producers to decrease production.

Producers benefits more when the price of goods and services increases in the market. This makes them have more profit.

To maintain this profit level, they often decrease their production output to create a form of artificial scarcity within the market to sustain the price at which their goods trades.

Answer:

C

Explanation:

edge 2021

Answer:

0.016 moles

Explanation: Because you are doing P4, you take the molar mass/atomic mass of phosphorous which is 30,97(rounded up) and multiply it by 4 since that's the subscript. Then you take 2.0 grams and divide it by the molar mass, which is 123.88, and that gives you 0.016 moles (rounded up)

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\ \)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{3.6 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 5.98006644...\)

We have the final answer as

Hope this helps you

Answer:

Compound: two or more different atoms chemically bonded together. Molecule: two or more different or same atoms chemically bonded together. Element: one single atom. A mixture contains two or more substances (elements, lattices, molecules, compounds), that are not chemically bonded together.

Explanation:

Answer:

Aluminium Oxide = 2.5×10²³ molecules

Carbon = 2.96 moles

Explanation:

1 mole of aluminium oxide contains 6.02× 10²³ molecules, hence 4.2 moles will contain 4.2 ×6.02×10²³ molecules

for carbon, number of moles = Mass/ Molar Mass = 35.6/12.01 = 2.96 mole

The 20 percent carbon monoxide level is approximately five times more effective for oxygen transport than the 60 percent carbon monoxide level.

Carbon monoxide (CO) is an odorless, colorless and tasteless gas that is toxic to humans and animals. It is produced when fossil fuels such as gasoline, wood, coal, or natural gas are burned. Carbon monoxide is a product of incomplete combustion, when there is not enough oxygen to produce carbon dioxide. In the presence of oxygen, carbon monoxide can be converted to carbon dioxide. In the environment, carbon monoxide is created by the burning of fossil fuels and by natural processes such as forest fires. In the home, carbon monoxide is produced by fuel-burning appliances, such as furnaces, stoves, water heaters, and fireplaces. Inadequate ventilation can allow carbon monoxide to accumulate to dangerous levels. Exposure to high levels of carbon monoxide can cause serious health problems, including death. Symptoms of carbon monoxide poisoning include headache, dizziness, nausea, and difficulty breathing.

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Answer:

We can Interprete it as 1mole of Sodium Chloride and 1mole of Silver Nitrate React to Produce

1Mole of Silver Chloride and 1Mole of Sodium Nitrate

Answer:NaCL

Explanation:Edg

yes sure, true it can beee

Answer:

False

Explanation:

The Big Bang theory claims that hydrogen was the first element to form.

Atomic number 1 and the letter H are used to identify the chemical element hydrogen. In the cosmos, it makes up around 75% of the elemental mass and is the lightest and most prevalent element. At room temperature and pressure, hydrogen is a colorless, tasteless, odorless gas that is non-toxic.

The Big Bang theory claims that hydrogen was the first element to form. The universe was made of a hot, dense plasma of protons, neutrons, and electrons in the initial moments following the Big Bang. These particles merged when the cosmos cooled and expanded to create hydrogen atoms, which subsequently fused to create the first stars. Helium, carbon, oxygen, and other atoms that make up the universe we see today were converted into heavier elements through nuclear fusion in these stars.

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Answer: Carbon Monoxide (CO), Sulfur Dioxide (SO2), and Nitrogen Dioxide(NO2).

Explanation:

Exposure to these noxious gases severely affects the respiratory system of an individual thus deteriorating his health. Pneumonia and Bronchitis are the tips of an iceberg among various diseases and prolonged illnesses.

True. Do not use oil-based products such as Vaseline and body lotions because they destroy latex. Latex is a natural rubber, and when it comes into contact with oil-based products, it reacts chemically.

This reaction causes latex to degrade and lose its elasticity, making it prone to breakage. Therefore, it is important to avoid oil-based products when using latex products, such as condoms, gloves, and other medical supplies. Instead, use water-based products that are safe to use with latex. Water-based products are gentle on the skin and do not react chemically with latex, making them ideal for use with latex products.

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