a gas that has a pressure of 7.5 atm and a volume of 20L what would be the new volume if the pressure was changed to 3.5 atm

Answer:

Is this the full question

Explanation:

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The concentration of the HCl solution needed to neutralize 25 mL of 0.2 M NaOH is 0.25 M

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

CaVa / CbVb = nA / nB

(Ca × 20) / (0.2 × 25) = 1

(Ca × 20) / 5  = 1

Cross multiply

Ca × 20  = 5

Divide both side by 20

Ca = 5 / 20

Ca = 0.25 M

Thus, the concentration of the HCl solution is 0. 25 M

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Answer:

Explanation: “Insoluble” generally means that a substance does not dissolve in water. Some examples include: sand, fats, wood, metals, and plastic. When we put them in water and try to mix them, they will not dissolve.

Explanation:

Answer:

I am first time from from from from from from

Answer and Explanation: The answer is false.

Answer:

I would have to say the answer is A) iron. I say this because Iron is one of the most well know conductors and in the chart it as rubber and copper as the two conductors whole Air and Iron should be the x. Plus the rest don't make good conductors they are more insulators. So logicaly it wouldn't make sense to have any of the other answers.

Explanation:

Hope This Helps

Have A Great Day

~Zero~

According to the concept of conduction, iron  belongs in the area marked with an X.

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .

When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:

1) heat conduction

2) electrical conduction

3)sound conduction

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It could destroy the crops by jumping all over them

Based on the illustration, the statement that best explains why the Scotch broom is able to outcompete the native plants in the area would be the specialized seed pods that allow seeds to be dispersed farther and into the less crowded areas.

Different organisms have different ways of behaving to ensure the survival of their propagules or offsprings.

In the case of the Scotch broom, the ability of the pods holding the seeds to burst open and catapult the seeds far away from the parent plant is a reproductive strategy to ensure that their seeds are well dispersed.

By doing so, the propagules of the plant will reach new areas where they do not exist before and as such, able to spread quite quicker than the native plants.

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Answer:

In poorly sorted sediments, those with a larger range of grain sizes, the finer grains tend to fill the spaces between the larger grains, resulting in lower porosity. Primary porosity can range from less than one percent in crystalline rocks like granite to over 55% in some soils.

Explanation:

Answer:

The amount of substance needed to saturate water increases as the temperature increases.

Explanation:

Virtual water is water used in the production of services and goods that consumers need and enjoy.

So, option A is correct.

Virtual water  is very important as it helps us understand the dependencies our economies have on others' resources.

In addition with the water footprint, virtual water enables us to map out the dependencies and to identify when and where risks may lie, in terms of scarcity and pollution as it's implications is found for food security, economy and diplomacy.

Virtual water is not water that has not yet fallen to Earth as precipitation and cannot be seen.

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Answer:

A and B are the same answer lol

Explanation:

Answer:

The 2 ohm branch

Explanation:

Since the resistors are in parallel, they are each connected to the same volatage.   Since   I = V/R    you can see that the one with the smallest resistance will have the greatest current through it .

Answer:

is this a full question ????

Explanation:

The strategy that is not a suggested way of treating or preventing a communicable disease is to receive a vaccine while you are ill from a virus.

A communicable disease is a type of disease that can spread from one person to another in the following ways:

There are various ways to prevent the spread of communicable diseases which include:

To receive a vaccine while ill from a virus is not advisable because there may be chances of spreading your illness to health care workers who are administering the vaccine.

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Answer:

Innate, or nonspecific, immunity is the defense system with which you were born. It protects you against all antigens. Innate immunity involves barriers that keep harmful materials from entering your body.

For a metal crystallizes into a face-centered cubic unit cell and has a radius of 2.86 Angstrom, the density  is mathematically given as

d=3.31g/cm

Generally, the equation for the density  is mathematically given as

[tex]d=\frac{2*m}{NA*a^3}\\\\Therefore\\\\d=\frac{2*295.6mol}{6.022*10^23*(6.67*10^{-3})}[/tex]

d=3.31g/cm

In conclusion, the density of this metal

d=3.31g/cm

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Answer:

dog

Explanation:

cats hide and break stuff pigs will probally stay outside all day and i ove dogs

I prefer a pig

Benefits of having a pig

- you can eat them

- they taste good

- they have bacon

- Richard

- they are good to eat

- they taste very good because of the bacon

- you can cook them

- they are good cooked

Answer:

B.fin position

C.colour of stripes

Answer:

Cr2(SO4)3+K2CO3---------------->Cr2(CO3)3+K2SO4

BALANCING

Cr2(SO4)3+3K2CO3------------------------->Cr2(CO3)+3K2SO4

Explanation:

Answer:

Yeah yeah i don't know what you want anybody to do with this question because you don't have all of your answers.

Answer:

The pH scale measures whether there is more hydronium or hydroxide in a solution. In other words, it tells us how basic or acidic the solution is. A lower pH means something is more acidic, also known as a stronger acid. A higher pH means it is more alkaline or a stronger base.

Answer:

true

Explanation:

Covalent bonds are formed through the overlap of half-filled valence orbitals. Because of the overlapping, it is most probable that electrons are located within the region of the bond.

In order to make a covalent bond, the orbitals on each atom in the bond must overlap. Therefore, the given statement is true.

A covalent bond is an electron exchange usually results in the production of electron pairs between atoms. These electron couples are referred to as bonding pairs as well as sharing pairs. Covalent bonding seems to be the permanent equilibrium of atoms' forces of attraction versus attraction when atoms share electrons.

Because to electron sharing, each atom in a number of molecules can achieve the corresponding amount of the valence shell, resulting inside a stable electronic configuration. In organic chemistry, covalent bonds are far more common than ionic ones. In order to make a covalent bond, the orbitals on each atom in the bond must overlap.

Therefore, the given statement is true.

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the density increases down the group.

Answer:

5

Explanation:

First find the balanced equation for this rxn

C3H8    +  5O2    ====>     3 CO2    + 4  H2O

To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. The correct option is option A.

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.

Propane gas, C[tex]_3[/tex]H[tex]_8[/tex], burns in excess oxygen gas. When the equation for this reaction is correctly balanced and all coefficients are reduced to their lowest whole-number terms, the coefficient for O[tex]_2[/tex] is 5.

C[tex]_3[/tex]H[tex]_8[/tex]    +  5O[tex]_2[/tex]  [tex]\rightarrow[/tex]   3 CO[tex]_2[/tex]    + 4  H[tex]_2[/tex]O

Therefore, the correct option is option B.

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Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction owing to te fact that energy is a reactant in the equation.

An endothermic reaction is one in  wioch energy is supplied to the system in order to enable the breakdown of bonds. Hence, the reaction vessel feels cool as energy is withdrawn from the surroundings.

The reaction;  Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction since energy is a reactant in the equation.

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Answer:

C. Agricultural runoff

Explanation:

sorry  if not helps if do im am sooooo happy

Answer:

Spring tides happen 2 times each month at the New and Full phases

Neap tides happen 2 times each month at the First Quarter and Third Quarter phases

Answer:

yup!

Explanation:

i dont know what else to say.

Answer:

Silver+ Hydroxide--> Silver oxide+ Water