PLEASE HELP URGENT!!
What is the SI system? What are its benefits?

Answer:

Reproducible by other scientists

The personal opinion of the scientist

Using vanable conditions for each test

Explanation:

Answer: i dont know but yu got it

Explanation:

answer : increasing pressure

the amount of gas that can be dissolved in liquid water increase with the increase in pressure

Answer:

increasing pressure

Explanation:

Answer:

337.5kPa ~ 338kPa

Explanation:

Using the ideal gas law PV=nRT we have the following definitions from the problem:

V(initial) = 20cm³

P(initial) = ?kPa

V(final) = 75cm³

P(final) = 90kPa

Since we know that the number of moles of the sample did not change, nor did the temperature, nor does the ideal gas constant (R) we can rewrite this equation to state:

P(initial)V(initial) = nRT =P(final)V(final) ~  P(initial)V(initial) = P(final)V(final)

Rearranging this equation as we are solving for the initial pressure we find that:

P(initial) = (P(final)V(final))/V(initial)

P(initial) = ((90kPa)(75cm³))/20cm³

P(initial) = 337.5kPa ~ 338kPA

Answer:

if wrong sorry ok????

Answer:

the correct answer is option ( A )

Both A and R are true and R is the correct explanation of A.

Explanation:

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Answer:

(A) Amine

Explanation:

Ch3Ch2Nh2 is an Amine.

An amine is often a functional group with a lone pair on the nitrogen atom. Amines structurally mimic ammonia, where nitrogen can link with up to three hydrogen atoms. Here the correct option is A.

Amines are organic substances that have a lone pair of nitrogen atoms in them. In essence, they are produced by replacing one or more hydrogen atoms in ammonia (NH₃) with an alkyl or aryl group, giving them the names alkylamines and arylamines, respectively.

In addition to medicines and treatments, amines are used to create nylon and azodyes. They are frequently employed in the creation of compounds for the filtration of water, and medicinal, and crop protection.

Thus the correct option is A.

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Answer:

the number of crickets in each container

Explanation:

to participate in the experiment you will have to know the crickets in the container

The balanced equation for the chemical equation given in the question above is: 2Cr(s) + 3Cl₂(aq) → 2CrCl₃(s)

The following data were obtained from the question:

Chemical equations are generally balanced by ensuring that the number of atoms of each element present on both sides of the equation are equal.

Now, we shall balance the equation given from the question as follow:

Cr(s) + Cl₂(aq) → CrCl₃(s)

There are 2 atoms of Cl on the left side and 3 atoms on the right side. It can be balanced by writing 2 before CrCl₃ and 3 before Cl₂ as shown below:

Cr(s) + 3Cl₂(aq) → 2CrCl₃(s)

There are 2 atoms of Cr on the right side and 1 atom on the left side. It can be balanced by writing 2 before Cr as shown below:

2Cr(s) + 3Cl₂(aq) → 2CrCl₃(s)

Thus, the equation is balanced.

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Pulp

distillation

chromatography

Acetone is captured and cooled.

Substance A is rice, and substance B is sugar.

To separate the components of a mixture the substances to be separated must differ in a given physical property.

In chemistry, there are diverse separation techniques used to separate the components of a mixture. Separation depends on differences in a given physical property such as boiling point, solubility in a solvent, difference in particle size etc.

Filtration can be used to separate a solid from a liquid hence it can be used to separate pulp from orange juice.

To separate water and alcohol, distillation is used because such a separation depends on the difference in the boiling points of water and alcohol. Water boils at a higher temperature than alcohol hence the mixture can be separated by distillation.

Chromatography is a method of separation that is dependent on how quickly a the components of a  mixture move through a stationary phase.

Acetone has a lower boiling point than water hence it collected first and cooled before water.

Clearly, substance A must be a solid since it is filtered out after adding water. Substance B must be a water soluble substance which can be recovered from water by evaporation to dryness. Hence substance A is rice, and substance B is sugar.

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Explanation:

a process for separating minerals from gangue by taking advantage of the differences in their hydrophobicity.

I believe that is accurate

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Answer:

for this question i think the answer is 1.35 atm

The correct statement that describes the relationship between thermal energy and particle movement is "As thermal energy increases, there is more particle movement".

WHAT IS THERMAL ENERGY?

Hence, as thermal energy of substance increases, there is more particle movement of that substance.

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Solution:-1

[tex]\\ \sf\longmapsto E=hv[/tex]

Solution:-2

[tex]\boxed{\sf \lambda=\dfrac{c}{v}}[/tex]

[tex]\\ \sf\longmapsto v=\dfrac{c}{\lambda}[/tex]

[tex]\\ \sf\longmapsto v=\dfrac{3\times 10^8m/s}{3000\times 10^{-10}m}[/tex]

[tex]\\ \sf\longmapsto v=0.001\times 10^{18}s^{-1}[/tex]

[tex]\\ \sf\longmapsto v=1.0\times 10^{15}s^{-1}[/tex]

Now

[tex]\\ \sf\longmapsto E=hv[/tex]

[tex]\\ \sf\longmapsto E=6.626\times 10^{-34}Js\times 1.0\times 10^{15}s^{-1}[/tex]

[tex]\\ \sf\longmapsto E=6.6\times 10^{-19}J[/tex]

Answer:

from the pic:

[tex]empirical \: formular : \: \: C _{2}H _{3}O _{2}[/tex]

since molar mass is 118.084 g/mol;

[tex](C _{2}H _{3}O _{2}) _{n} = 118.084 \\ C _{2n}H _{3n}O _{2n} = 118.084 \\(12 \times 2) _{n} + (1 \times 3) _{n} + (16 \times2 ) _{n} = 118.084 \\ 24_{n} + 3_{n} + 32_{n} = 118.084 \\ 59_{n} = 118.084 \\ n = 2[/tex]

[tex]{ \boxed{ \bf{molecular \: formular : \: C _{4}H _{6}O _{4}}}}[/tex]

It is an aldehyde with structure ( second pic )

Answer:

It is an aldehyde with structure

The correct answer is; Carbon atoms can form chains and branches with each other, and other atoms can attach to these.

Organic chemistry is regarded as the chemistry of carbon compounds and carbon atoms are known to catenate.

Organic chemistry is the branch of chemistry that studies carbon compounds. There are thousands of organic compounds in existence.

The common thread that joins all these organic compounds is that they all contain a long or branched chain of carbon atoms linked to each other. This ability of carbon atoms to self-link forming long chains or branches or macrocyclic compounds is called catenation.

The long or branched chain of carbon is therefore the "back bone" or main framework of the compound.

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Answer:

(Question 1) Metallic bonds are responsible for many properties of metals, such as conductivity. Why is this possible?

(Answer) The bonds can shift because valence electrons are held loosely and move freely.

(Question 2) Between which types of elements do ionic bonds occur, and how do electrons act within the bond?

(Answer) metals and nonmetals, electrons transferred

(Question 3) Which kind of bond would occur between sodium (Na, Group IA) and chlorine (Cl, Group VIIA)?

(Answer) ionic

(Question 4) Why is carbon said to provide a “backbone” in many molecules?

(Answer) Carbon atoms can form chains and branches with each other, and other atoms can attach to these.

(Question 5) Which option describes the structure of the electron shells in a neutral carbon atom?

(Answer) The inner shell is complete with two electrons. The outer shell is incomplete with four electrons.

Explanation:

i just finished the quick check UwU

Answer:

the eye socket

Explanation:

the area around the eye is called the eye socket or the eye orbit.

Answer:

Volcanic eruptions release gases into the air.

Explanation:

This is because the atmosphere collects the gas from the volcano, the volcano is apart of the geosphere because it is a part of the earth's surfaces.

Force = The external energy that changes or tends to change the state of any body or object is called force.

Speed = The rate of distance is called speed.

Answer:

Force is a push or pull which changes or tend to change the position of a body.

The rate of change its position with time or magnitude is called speed.

Explanation:

Answer:

group ten period four. that's the answer

Answer:Water contains Oxygen the purified the methane gas

Explanation:

Answer:

yes

Explanation:

Kids like fun things, and school is not fun , so if kids got to go to school on a zipline, attendance would be through the roof!

Answer:

B. False

Explanation:

step by step explanation

Answer:

False

Explanation:

Answer:1) It is due to large cohesive force acting between the molecules of mercury that the droplets of mercury when brought in contact pulled together to form a bigger drop in order to make potential energy minimum. The temperature of this bigger drop increases since the total surface area decreases.  

2) A spherical shape has the minimum surface area to volume ratio of all geometric forms. When two drops of a liquid are brought in contact, the cohesive forces between their molecules coalesce the drops into a single larger drop. This is because, the volume of the liquid remaining the same, the surface area of the resulting single drop is less than the combined surface area of the smaller drops. The resulting decrease in surface energy is released into the environment as heat.  

Arsenic contamination of groundwater is a form of groundwater pollution which is often due to naturally occurring high concentrations of arsenic in deeper levels of groundwater.Arsenic contamination of ground water is found in many countries throughout the world, including the US.

Answer:

A cell wall is a fairly rigid layer surrounding a cell located outside of the plasma membrane that provides additional support and protection. They are found in bacteria, archaea, fungi, plants, and algae. Animals and most other protists have cell membranes without surrounding cell walls.

Explanation:

Answer:

write in English bro? can you?

Explanation:

I can't understand your language sorry .