375cm3 of a gas has a pressure of 770 mm Hg, find it Volume if the pressure is reduced to 750 mm Hg​

Answers

Answer 1

Answer:

385 cm^3

Explanation:

375cm3 of a gas has a pressure of 770 mm Hg, find it Volume if the pressure is reduced to 750 mm Hg

​if we reduce the pressure, the volume increase since since PV is constant

so the new volume = 0.375 cm^3 X 770/750 = 385 cm^3

63


Related Questions

Airflow through a long 0.2m square air conditioning duct maintained the outer duct surface temperature at 10degree.if the horizontal duct is uninsulated and exposed to air at 35degree in the crawl space beneath at home.
What is the heat gain per unit length of the duct.

Answers

Answer:

125°C/m

Explanation:

The difference in temperature will be:

35 - 10 = 25

The outer duct surface is heated 25°C by the air from 10°C to 35°C;

This heat gain is simply divided by 0.2m to get heat gain per unit length:

25/0.2 = 125

125°C/m

If you're American, this will be °F I believe, so the answer will be:

125°F/m

According to VSEPR theory, a molecule with the general formula AX2E2 (A is the central atom, X is the bonded atom and E is a lone pair of electrons) has how many regions of electron density around the central atom [ Select ]

Answers

Answer:

see explanation

Explanation:

An AX₂E₂ geometry is derived from an AX₄ parent geometry and is based upon 4 regions of electron density about the central element and defines a tetrahedral geometry and the geometry is bent angular.

An example is the water molecule (H₂O) with two covalent O - H bonds and two free pair electrons on the central oxygen element.

Nancy rides her bike 114.8 miles in 8.2 hours. What is her average speed in miles per hour

Answers

Answer: 14 mph

Explanation: All you need to do is divide the total miles by the total hours to find the average speed per mile.

The answer to the question is 14 no cap

What happens to the kinetic energy of the bowling ball when it reaches the pins?​

Answers

Answer:

The bowling ball has kinetic energy as it moves toward the pins.

Explanation:

Answer:

Most of it is transferred to the pins, but some of it is changed into heat and sound energy.

Explanation:

study island

Find the volume of 0.160 M sulfuric acid necessary to react completely with 75.0 g sodium hydroxide.

Answers

The volume of 0.160 M sulfuric acid necessary to react completely with 75.0 g sodium hydroxide is 0.15L

The reaction of sulphuric acid and sodium hydroxide is expressed as:

[tex]2NaOH + H_2SO_4 ==> Na_2SO_4 + 2H_2O[/tex]

Determine the moles of NaOH present

Molar mass of NaOH = 23 + 16 + 1 = 40g/mole

Given that mass of NaOH is 75.0g

Mole of NaOH = 75/40  = 1.875moles

Determine the number of moles [tex]H_2SO_4[/tex] needed to react with 1.875 moles NaOH

Moles of [tex]H_2SO_4[/tex] = [tex]\frac{1.875}{2} = 0.9375moles of H_2SO_4[/tex]

Recall that volume = Molar mass * number of moles

Volume of [tex]H_2SO_4[/tex] =  0.160 * 0.9375

Volume of  [tex]H_2SO_4[/tex] = 0.15L

Hence the volume of 0.160 M sulfuric acid necessary to react completely with 75.0 g sodium hydroxide is 0.15L

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13500 mL convert to milliliters of mercury

Answers

Answer:approximately 5.627 × 1019 milliliters

Explanation:

How do the elements beryllium, carbon, and oxygen produce stars such as the Sun?

Answers

Answer:

Beryllium, carbon, and oxygen do not create stars like the sun. The sun is a massive cluster of hydrogen atoms being fused into helium atoms and heavier metals like Beryllium, carbon, and oxygen through the process of nuclear fusion. The more mass a star has in its core the more fusions that can occur and the heavier the metals inside can be fused into.

Explanation:

hope this helps. . . <3

good luck!     uωu

How many grams are contained in the quantity 0.34 mol Ca

Answers

Answer:

13.6272 Grams

Explanation:

Moles of Calcium × atomic weight = Grams

0.34 × 40.08 = 13.6272

0.34 Moles of Calcium = 13.6272 Grams

Using this chemical stoichiometry, determine the number of moles of carbonic acid that can be produced from 2 mol NaHCO3 and 7 mol HCl.

Answers

Answer:

reaction is NaHCO3 + HCL = H2CO3 + NaCl

the ratios are 1:1  

the 8 moles of HCl are in excess

so if you use 4 moles of NaHCO3 then you will obtain 4 moles of carbonic acid

hope that helps

Explanation:

which one is not allotropes of carbon? ​

Answers

Answer:

B. Activated Carbon

Explanation:

buna, am nevoie de un site de facut proiecte

Answers

Answer:

translation to English please

How many carbon (C) atoms are in C3Hg? A. 8 B. 5 C. 1 D. 3​

Answers

Answer:

the answer is D

aufbau principle
what is the meaning of the principle

Answers

Answer:

The meaning of this principle is building-up.

Explanation:

The Aufbau principle asserts that electrons occupy lower-energy atomic orbitals before filling higher-energy ones (Aufbau is German for "building-up") (Aufbau is German for "building-up"). By using this method, we may forecast the electron configurations for atoms or ions.

cm 5. Express the result of adding 856.6g and 23.86g to the correct number of significant figures. ​

Answers

Answer:

880.5

Explanation:

Express the result of adding 856.6g and 23.86g to the correct number of significant figures.

856.6 +23.86  = 856.6 + 23.9 = 880.5

The result of adding 856.6 g and 23.86 g after rounding off to correct significant figures is 856.6 + 23.9=880.5.

What are significant figures?

Significant figures are used for establishment  of a number which is presented in the form of digits. These digits give a meaningful representation  to the numbers.

The significant figures are the significant digits which convey the meaning according to the accuracy. These provide precision to the numbers and hence are called as significant numbers.There are rules for counting significant figures which are as follows:

1)All non-zero digits are significant .

2)All zeroes which occur between non-zero digits are significant.

3)All zeroes to the left and right of  a non-zero digit are not significant.

4) All zeroes on right  of decimal are significant if a non-zero number follows them.

5)All zeroes on right side of non-zero digit are significant.

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What is the expression for the equilibrium constant for the
reaction N2+ 3H2 = 2NH3?

Answers

Answer:

For the reaction N2 + 3H2 2NH3 , the equilibrium expression may be written as K [ NH3 ]^2/ [ N2 ] [ H2 ]^3 .

Explanation:

Answer:

s K [ NH3 ]^2/ [ N2 ] [ H2 ]^3 .

Explanation:

because I know -_-

my sheesh hurts my sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurtsmy sheesh hurts

Answers

Answer:

1

Explanation:

Answer:

Um.....

Explanation:

Thanks for the pts

✌️❤️✌️

Did all the silver ions get consumed in the reaction? The molar mass of silver is 107.87 g/mol. Justify your answer.

Answers

This problem is asking for the consumption of silver ions when silver nitrate is reacted with copper. In such a case, since no masses are given, we can use the following from similar problems:

Mass of empty beaker: 110.000 g

Mass of beaker with silver nitrate (after all additions) and copper: 331.634 g.

Mass of beaker with silver: 113.395 g.

This means we can write the following chemical equation:

[tex]Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag[/tex]

And thus calculate the mass of silver nitrate that will produce the following mass of silver:

[tex]m_{Ag}^{produced}=113.395g-110.000g=3.395g[/tex]

Next, we use the 2:2 mole ratio of silver to silver nitrate (silver ions source):

[tex]3.395gAg*\frac{1molAg}{107.87gAg}*\frac{2molAgNO_3}{2molAg} *\frac{169.87gAgNO_3}{1molAgNO_3} = 5.35gAgNO_3[/tex]

The step will be defined for the given mass of available silver nitrate which will be compared to 5.35 g (consumed mass) to see if they are the same (all consumed) or different (partial consumption).

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Fill in the the correct term to complete the sentence provided. The ______ produces chemical changes to provide energy.

Answers

Answer:

chemical reaction

Explanation:

The chemical reaction produces chemical changes to provide energy. Chemical reactions often involve changes in energy due to the breaking and formation of bonds.

Which of the following do not have angular momentum? Choose all that apply: O A. A spinning planet O B. A boy sleeping in bed O C. A ball sitting in a garbage can O D. A Ferris wheel in motion​

Answers

Answer:

The answer is A and B

Explanation:

20 points! Please Help!!

Based on what you have read what is the opportunity cost of the glass-making company's decision?
a higher quaity tem
a greater proft
a loss of equipment
a longer production time​

Answers

Answer:

a greater profit......

8) What mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride?​

Answers

Answer:

38.3 g

Explanation:

8) What mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride?​

first write, then balance the equation

Fe + Cl2-------------> FeCl3

2Fe + 3Cl2----------> 2FeCl3

2 moles of Fe require 3 moles of Cl2

the atomic mass of Fe is 56

20/56= 0.36 moles of Fe

this requires o.36 X 3/2 = 0.54 moles of Cl2

Cl2 has a molar mass of 35.5 X 2=71

1 mole of Cl2 is 71g

0.54 moles is 0.54 X 71 g= 38.3 g

The mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride is 38.3 g.

What is mass?

Mass is defined as a numerical representation of the fundamental characteristic of all matter, inertia.

It can also be defined as a dimensionless number used to describe the mass of a particle or item.

[tex]\rm 2Fe + 3Cl_2\rightarrow2FeCl_3[/tex]

As per the reaction 3 mole of chlorine is required for 2 mole of fluorine.

Atomic mass of fluorine = 56

Moles of Fe = 20 / 56

                    =  0.36 moles

This require 0.36 x 3/2 = 0.54 moles of Cl₂

Molar mass of Cl = 35.5

So for Cl₂ = 2 x 35.5 = 71 moles

For 1 mole of Cl₂ = 71 moles is needed

So, for 0.54 moles = 71 x 0.54

                               = 38.3 g

Thus, the mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride is 38.3 g.

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PLEASE ANSWER WITHIN THIS HOUR!
Which of the following does NOT describe the epidermis?

A. It is waterproof.
B. It houses the sweat and oil glands.
C. It is the outermost layer of the skin.
D. Its surface consists of dead cells that continually shed off.
Thank you!

Answers

Answer:

it doesn't house the sweat and oil glands

Explanation:

the epidermis doesn't house the oil and sweat glands but the dermis does

Be sure to answer all parts. Select the anti periplanar geometry for the E2 reaction of (CH3)2CHCH2Br with base. mc2x mc2xd1 mc2xans mc2xd2 Then draw the product that results after elimination of HBr. draw structure ...

Answers

The anti periplanar geometry for the E2 reaction of (CH3)2CHCH2Br with base is shown in the image attached as well as the structure of the product formed in the reaction.

In organic chemistry, an antiperiplanar conformation is one in which the groups point up and down at a dihedral angle of 180° away from one another. In the image attached, the antiperiplanar conformation of (CH3)2CHCH2Br is shown.

Recall that an E2 reaction is a synchronous elimination reaction where to atoms leave at the same time. The product of this reaction is also shown in the image attached.

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A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 400. mL of a solution that has a concentration of Na ions of 1.00 M

Answers

Answer:

21.86 grams

Explanation:

It is important to note that for every mol of Na3PO4 there is, 3 mols of Na ions are produced.

Na+=1m(0.4l), so mols of Na3PO4= 0.4/3= 0.13333... mols

the molar mass of Na3PO4 is 163.94 grams/mol. 0.1333*163.94=21.86 grams of Na3PO4.

Which of these is the condensed structural formula for an alkane with four carbon
atoms?
O CH3CH2CH2CH3
H
HLH
1C
H
C2
LH
I
C
HTH Н
H
0-I
I

H
OCH3CHCHCH3
OC-C-C-C

Answers

Answer:

First option

Explanation:

The option that says CH3CH2CH2CH3 is the correct option (I hope that I am right because the order of the answers is not very clear :/)

HELP PLEASE I WILL GIVE BRAINLIEST PLEASE HELP ME

Explain the law of conservation of mass. Give an example of how mass is conserved using numbers to justify your answer.

Answers

Answer:

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction.

For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.

Another example, solar panels don't create solar energy. They harness energy from the sun and transform it into another type of energy (electricity).

If aqueous solutions of Na2CO3 and BaCl2 are mixed, which insoluble precipitate is formed?

Answers

Answer:

barium chloride (BaCl2) is added to sodium carbonate (Na2CO3). The result is a white precipitate.

Explanation:

Is there a need for adhesives?

Answers

Answer:

yes

Explanation:

what would happen if the next time you needed tape or glue you remember, oh wait theres none at the house, thats just an example of why you would indeed need adhesives

Determine the wavelength of a radio station transmitting a broadcast at 520 Megahertz.

Answers

The wavelength of the radio station broadcasting at 520 megahertz is 0.58m.

HOW TO CALCULATE WAVELENGTH:

The wavelength of a wave can be calculated by dividing the speed of the wave by its frequency as follows:

λ = v/f

Where;

v= velocity of the wave (3 × 10⁸m/s)f = frequency (Hz)

According to this question, a radio station is transmitting a broadcast at 520 Megahertz. The wavelength is calculated as follows:

λ = 3 × 10⁸ ÷ 5.2 × 10⁸

λ = 0.577 × 10⁸-⁸

λ = 0.58m

Therefore, wavelength of the radio station broadcasting at 520 megahertz is 0.58m.

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Why is there an octet rule in writing Lewis structures?​

Answers

Answer:

Before we can sketch the Lewis structures of molecules, we must first understand the octet rule. The octet rule asserts that when atoms combine to create compounds, electrons are gained, lost, or shared among them, resulting in a stable electron configuration defined by eight valence electrons as a result. These rules are used in conjunction with the main-group components of the second period.

Explanation:

Hope it helps:)

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