1 Volume of certain amount of a gas at 25°C and
100 cm Hg pressure is 80 mL. The gas is
expanded to 160 mL keeping the temperature
constant. Calculate the pressure of the expanded
Numericals based on Boyle's law​

Answers

Answer 1

Answer:

P₂ =  50 mmHg

Explanation:

Given data:

Initial volume of gas = 80 mL

Initial pressure of gas = 100 mmHg

Final volume = 160 mL

Final pressure = ?

Temperature = constant

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

100 mmHg × 80 mL = P₂ × 160 mL

P₂ = 8000 mmHg. mL/ 160 mL

P₂ =  50 mmHg


Related Questions

As a reaction proceeds, does the instantaneous reaction rate increase or decrease?.

Answers

The correct answer for this question is Decreases.

How quickly or slowly a reaction proceeds is known as the rate of reaction or speed of reaction for a reactant or product. As the reaction progresses, the rate of reaction slows because the initial concentration of the reactants is high, but as time goes on, this concentration falls, making the reaction slower. As a result, the rate of reaction is dependent on concentration and diminishes over time.

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Write the properties of solid substances.​

Answers

Definite shape and volume, high density, definite melting point, low rate of diffusion, and incompressible

You are a chemist working in your laboratory. In your storage closet you have a cabinet that holds only samples of pure elements, no compounds. While looking for a sample of lithium (Li), you notice that the label on one bottle has worn off. The room is at normal temperature. The contents of the bottle are liquid and do not look metallic. What element should you relabel the bottle as?

Answers

Answer:

Mercury

Explanation:

While it is true that most metals are solid at room temperature, mercury is liquid at room temperature hence mercury is often designated as the 'liquid metal'.

Thus, if i find a bottle on the shelf that has no solid in it, only liquid and i know that only pure metals are stored in that area of the laboratory, then i will quickly relabel it as mercury.

Why aren't 3rd 4th and 5th compounds having same stability? ​

Answers

Answer:

Due to cis trans isomerism

Explanation:

31. (03.03 MC)
Which of the following best represents and explains the formula for a compound made from fluorine and hydrogen? (5 points)
O HF, because both fluorine and hydrogen are capable of forming only one lonic bond.
O HF, because both fluorine and hydrogen are capable of forming only one covalent bond.
O H,F, because fluorine is short of two electrons, and hydrogen is short of one electron.
OH,F, because fluorine is capable of forming one, and hydrogen is capable of forming two covalent bonds.

Answers

Answer:c

Explanation:

Some lipid rafts are characterized by an accumulation of cholesterol. What does this mean for the fluidity of the lipid raft?.

Answers

The lipid rafts are less fluid than the surrounding membrane at normal temperatures.

Cholesterol decreases the fluidity of the membrane at normal temperatures.

Lipid rafts regulate neurotransmission, receptor traffickinging and influence membrane fluidity.

For example, in phospholipid layer in cell membrane, there are hydrophilic heads (polar part of the layer) and hydrophobic tails (nonpolar part of the layer).

1) Small, non-polar molecules diffuse easily through this layer, no energy is required, this is passive transport.

2) Polar molecules cannot diffuse through phospholipid layer using passive transport, because hydrophobic tails does not allow that (polar molecules are reppeled), energy is required for that, this is active transport.

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Which has the longest bond length for the Cl-O bond?
1. ClO4-
2. ClO3-
3. ClO2-
4. ClO-

Answers

Answer:

4 ClO-

Explanation:

Bond length ∝ 1/ Bond order

Bond order of ClO − =1,

Bond order of ClO 2− =1.5,

Bond order of ClO 3− =1.66 ,

Bond order of ClO 4− =1.75.

Thus the order of bond length is

ClO 4− <ClO3− <ClO2−

<ClO −

[I'd really appreciate if I could get some help with this. ]

Complete the table below by indicating what kind of interaction (attract or repel) will be evident when particles of different or like-charges interact?​

Answers

Like charges repel while the unlike charges attract.

What is electrostatics?

Electrostatics has to do with the interaction that does occur between charges. We know that a charge is a specie that has an imbalance in the number of electrons that it contains. The substance is positively charged if it contains less electrons and more protons. The substance is negatively charged if it contains more electrons and less of protons.

In either case, the interaction that exist between particles could be an attractive one or a repulsive one. It is regarded as the first law of electrostatics that like charges repel while the unlike charges attract.

Hence when we look at the table, a negative charge would repel another negative charge, a positive charge would repel another positive charge but a positive or a negative charge would attract a charge of opposite sign. The interaction that is possible between the charges is given by Coulombs law.

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convert 7.1x10^25 molecules of water to moles

Answers

Answer:

117.94 moles

Explanation:

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

[tex]n = \frac{N}{L} \\[/tex]

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

[tex]n = \frac{7.1 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 117.940199...[/tex]

We have the final answer as

117.94 moles

Hope this helps you

mass in grams of 3.32 mol k

Answers

Answer:

129.8 grams

Explanation:

Im a bit confused of what your are asking but if your are asking the mass in grams of K (Potassium) it is very easy dont worry

You multiply mols x Molecular weight.

So

3.32x 39.1= 129.8 grams

What is pentene?
A.) An Alkane
B.) An Alkene
C.) An Alkyne
D.) A Polymer

Answers

Pentene is B. An Alkene

Answer:

B. an alkene

Explanation:

pentene has 5 carbons and 10 hydrogen atoms and one double bond

What type of representative particle does KClO3 have?

atoms

formula units

molecules

Answers

Answer:

formula units

Explanation:

[tex]$KClO_3$[/tex]  is  potassium chlorate. It is an ionic compound containing potassium, chlorine and oxygen. The ion in potassium chlorate are held together by the ionic bonds in the lattice structure.

A representative particle may be defined as the smallest unit for which the substance exists in its natural form. For most of the elements, atom is the representative particle. Molecule is the representative particle for diatoms and molecular compounds. But for ionic compounds such as  [tex]$KClO_3$[/tex] , NaCl, etc. . the representative particle is its formula units.

Which force helps food move through the large intestine during digestion?

A Muscle contractions exert a pushing force on the food.
B Oxygen molecules exert a pulling force on the food.
C Gravity exerts an upward pushing force on the food.
D Water exerts an upward pushing force on the food.

Answers

Answer:

The answer is A

Explanation:

Pls put me as brainliest

The force helps food move through the large intestine during digestion is muscle contractions exert a pushing force on the food. Thus option A is correct.

What is force?

Force is defined as a push or pull upon any object resulting from the object's interaction with another object. It is a vector quantity.

Force can also be defined as an external cause that, when applied, changes or tends to change the state of the body, if the body is in motion.

Force is expressed as

Force = mass x acceleration

There are five types of force

Gravitational forceElectric forceMagnetic forceNuclear forceFrictional force

Digestion is define as the breakdown of food into smaller component  that can be absorbed into blood streams.

Thus, the force helps food move through the large intestine during digestion is muscle contractions exert a pushing force on the food. Thus option A is correct.

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What is the density of a board whose dimensions are 5.54 cm x 10.6 cm X 199 cm and
whose mass is 28.6 g?

Answers

Answer:

0.00244g/cm³ (3 s.f.)

Explanation:

The formula of density is [tex]\frac{mass}{volume}[/tex]. We already know the mass is 28.6kg, so we need to find the volume first before calculating the density.

Volume of board = 5.54 cm × 10.6 cm × 199 cm

                            = 11 700 cm³ (3 s.f.)

Density of board = [tex]\frac{28.6}{11 700}[/tex]

                            = 0.00244g/cm³ (3 s.f.)

Answer:

d = 0.0024 g/cm³

Explanation:

Given data:

Density of board = ?

Volume = 5.54 cm× 10.6 cm× 199 cm

Mass of board = 28.6 g

Solution:

Formula:

d = m/v

d = density

m = mass

v = volume

Volume = 5.54 cm× 10.6 cm× 199 cm = 11686.1 cm³

d = 28.6 g/ 11686.1 cm³

d = 0.0024 g/cm³

a rock is examined to determine its age, and the ratio of uranium-235 to lead-207 is found to be 125,000:875,000. the half-life of uranium-235 is 700 million years. how old is the rock being examined?

Answers

The old age of rock when examined is 21.4 million years if the ratio of uranium-235 to lead-207 is found to be 125,000:875,000. the half-life of uranium-235 is 700 million years.

Decaying Equation

P = [P + D] (1/2) ^(t/t(1/2))

where,

P represent the present parent amount

D is the present daughter amount

t(1/2) is the half life time period

t is the actual age

We know that,

t = (log[(P+D) /P] / log2) × t(1/2) ----------(1)

Given,

P = 97.6

D = 2.1

Ratio of P and D can be calculated as

P/D = 97.6/2.1

= 46.476

By substituting all the values in eq(1), we get

t = [(log 46.476 +1)/log2] × t(1/2)

Given,

The half life of U —Pb decay is 700 million years.

So,

t = [(log 46.476 +1)/log2] × 700

t = 21.4 million years.

Thus, we calculated that the the old age of rock when examined is 21.4 million years.

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DISCLAIMER:

The given question is misprint on portal.

Here is the correct form of question:

A rock is examined to determine its age, and the ratio of uranium-235 to lead-207 is found to be 125,000:875,000. the half-life of uranium-235 is 700 million years.

How old is the rock if it contains Uranium-235/ lead-207 ratio of 97.6 to 2.1?

1.3 How Science Works - Notes
What is science?

Answers

Answer: I think you have to look in the textbook

Explanation:

it's impossible to answer without the stinking textbook

which contains the least number of electrons

Answers

Answer: I don't know try your best

Explanation:

The least number of electrons is an element with the least number of protons (the number of electrons and protons stay the same)

Define covalent bond.

Answers

covalent bond/ a chemical bond that involves the sharing of electron pairs between atoms

What is the movement of particles of an object on the amount of what have

Answers

Answer:

i just ad the same question and but i fon know what ther answrr ied so i cant hep you but i had he smae question on rge mdhfyqf

Explanation:

Can someone help me please? It’s due before 2 today...

Answers

Answer:

A inside the nucleus

Explanation:

All the protons (and neutrons) in an atom belong in the nucleus of an atom. Only the electrons of an atom stay in orbit.

F the distance separating the objects is the same for each pair, which pair of objects will have the greatest gravitational force between them? a 50-kg object and an 80-kg object a 65-kg object and a 65-kg object a 65-kg object and a 75-kg object a 60-kg object and a 70-kg object

Answers

Answer:

A 65-kg object and an 75-kg object.

Explanation:

The gravitational force is given by :

[tex]F=G\dfrac{m_1m_2}{r^2}[/tex]

F is directly proportional to the product of masses and inversely to the distance between them.

In this problem, the distance separating the objects is same for each pair. We need to find the greatest gravitational force between them.

(1) a 50-kg object and an 80-kg object

[tex]F_1=G\dfrac{4000}{r^2}\ N[/tex]

(2) a 65-kg object and an 65-kg object

[tex]F_2=G\dfrac{4225}{r^2}\ N[/tex]

(3) a 65-kg object and an 75-kg object

[tex]F_3=G\dfrac{4875}{r^2}\ N[/tex]

(4) a 60-kg object and an 70-kg object

[tex]F_4=G\dfrac{4200}{r^2}\ N[/tex]

From the above calculations we find that if the product of masses is maximum, it lead to maximum gravitational force between objects. Hence, a 65-kg object and an 75-kg object will have maximum gravitational force between them.


A sample of silver metal contains 1.91 X 1021 atoms. How many moles of silver is
this?

Answers

Answer:

1.91×1021/6.023×10^23

Explanation:

need thanks and make me brainiest if it helps you

is energy transfered from reactants to products or products and reactants.

Answers

Answer: Energy is transferred from reactants to products .

Explanation: Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Reactants are your starting point, and products are your result.

Which substance is a pure substance? Cereal Silver Jelly bean Shampoo​

Answers

Answer: Silver

Explanation:

Answer:

SILVERRRRRRRRRRR

Explanation:

Which statement best explains why protons are used
to identify an element?

Answers

Answer:

Every atom of an element will have the same number of protons

Explanation:

Protons are used to identify an element because every atom of an element will have the same number of protons.

Protons are the positively charged particles found in an atom. They are called the atomic numberEvery atom of an element has the same number of protons. An element can have different atom in form of isotopes. These isotopes are only identifiable by the number of protons they have.

what atom does not contain neutron​

Answers

Answer:

There is only one stable atom that does not have neutrons. It is an isotope of the element hydrogen called protium. Protium, which contains a single proton and a single electron, is the simplest atom. All other stable atoms contain some number of neutrons. hope this helps you :)

element hydrogen
There is only one stable atom that does not have neutrons. It is an isotope of the element hydrogen called protium. Protium, which contains a single proton and a single electron, is the simplest atom. in size which cannot accommodate any heavier neutron. It also makes hydrogen atom unstable in nature. All elements have atoms with neutrons except for one. A normal hydrogen (H) atom does not have any neutrons in its tiny nucleus. That tiny little atom (the tiniest of all) has only one electron and one proton. ... Deuterium is a hydrogen atom with an extra neutron and tritium has two extra. Neutron stars are made out of neutrons, so there's definitely no atoms there. The sparse matter which is between stars or between galaxies, which is the majority of the mass in the universe (!) (not including dark matter), is also not mostly made of atoms. It's apparently a plasma-like mix of protons and electrons. Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron. An atom is the smallest building block or fraction of an accessible chemical element that retains the chemical properties of that element. The origin of the English word goes back to the Greek word atomos, which means indivisible; It was believed that nothing is smaller than an atom.

ASAP please and thankyou

Options:
pollen
pistil
purple
white​

Answers

Answer:

pistil

Explanation:

What is a negative Gibbs free-energy value an indication of?


an enzymatic reaction


a reversible reaction


a spontaneous reaction


an equilibrium reaction

Answers

A reversible reaction

A negative Gibbs free-energy value is an indication of a spontaneous reaction. This means that the reaction will occur without the need for any external energy input and will release energy that can be used to drive other processes. The correct answer is option c.

Gibbs free energy is a thermodynamic quantity that describes the amount of energy available to do work in a system. It takes into account both the enthalpy (heat) and entropy (disorder) of a system.

A negative Gibbs free-energy value indicates that the reaction will release energy and increase the disorder of the system, which is a characteristic of spontaneous reactions.

Therefore, a negative Gibbs free-energy value is an indication of a spontaneous reaction. Option c is the correct answer.

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what is the name of the covalent compound N5Cl8

Answers

Answer:

Did you put that in right because i've never heard of a compound called that nor is there a compound called that on the internet

Explanation:

You must of put that in wrong

using your balanced equation from q20, determine how many ml of 0.25 m koh is needed to neutralize 10 ml of 0.5 m h3po4

Answers

60 mL volume of 0.25M KOH was needed to neutralize 10 mL of 0.50 M H3PO4.

The balanced reaction for the reaction of KOH and H3PO4 is shown below.

3KOH + H3PO4 → K3PO4 + 3H2O

mol of H3PO4 = (0.50 M) * (10 mL) * (1 L/1000 mL) = 5x10-3 mol

The number of moles of KOH needed to neutralize H3PO4 will depend on their stoichiometric ratio.

moles KOH = mol H3PO4 * (3 mol KOH / 1 mol H3PO4)

moles KOH = 5x10-3 mol * (3 mol KOH / 1 mol H3PO4)

moles KOH = 1.5X10-2 mol

mol of KOH = (concentration KOH)(volume KOH)

volume KOH = mol KOH / concentration KOH

volume KOH = 1.5 x 10 -2 mol / 0.25 M

volume KOH = 0.06 L or 60 mL

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