For the equilibrium PCl5(g)⇌PCl3(g)+Cl2(g), the equilibrium constant Kp is 0.497 at 500K. A gas cylinder at 500K is charged with PCl5(g) at an initial pressure of 1.66atm. Determine the equilibrium pressure of all species at this temperature.

Answer:

25 mL

Explanation:

The water level increased from 20mL to 45mL

That is the volume of the metal

45 - 20 = 25

The volume of the metal was 25 mL

Density = mass / volume

Density = 150 / 25

Density = 6 grams / mL

The branch of science which deals with chemical bonds is called chemistry.

The correct answer to the question is rancidity.

The process of decomposition of the edible items in presence of air which gives a bad odor is called rancidity.

The canned baked items are less prone to rancidity because they have preservation and nitrogen gas in them which prevent them from decomposition.

When the food reacts with the air it starts to decomposition due to oxidation.

Hence, canned baked last longer than the can in the air.

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Answer:

help them

Explanation:

Answer:

Roll over the ground as fast as possible and cover the person as soon as possible.

Explanation:

When you run, the body on fire catches oxygen which stimulates a combustion reaction hence causing the fire to grow bigger.

Hope this helps! :)

And if possible, please mark this answer brainliest so I can get to the next rank :)

Answer:

Dimethylmethane and propane

Explanation:

Answer:

Higher pressure, is the right answer.

Explanation:

The A will have a higher pressure. Since we have given the volume and temperature is same in both containers A and B. Below is the calculation for proof that shows which container has the higher pressure while keeping the volume and temperature the same.  

[tex]So, \ V_A = V_B \\\frac{n_A T_A}{P_A} = \frac{n_B T_B}{P_B} \\Here, \ T_A = T_B \\P_A = \frac{n_A}{n_B} \times P_B \\\frac{n_A}{n_B} > 1 \\\frac{P_A}{P_B} > 1 \\P_A > P_B \\[/tex]

Therefore, the container “A” will have higher pressure.

Container A will have a higher pressure than container B.

According to the approximations of ideal gas conditions, the pressure of a gas is directly proportional to the number of molecules of a gas at constant temperature and volume.

Having this in mind, at constant temperature and volume, container A has more gaseous molecules than B, then container A will have a higher pressure than container B.

Missing parts;

If two separate containers A and B have the same volume and temperature, but container A has more gaseous molecules than B, then container A will have: A) Higher pressure B) Lower pressure C) A greater universal gas constant D) A smaller universal gas constant

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Answer:

d

Explanation:

when an atom lose an electron its radius reduces

Hello. You did not enter answer options. The options are:

a. The OH group was removed from the reactante

b. The OH group was replaced by an H atom.

c. Two atoms were removed from the reactant.

d. An H atom abd a OH group have been removed drom the reactant.

In addition, you forgot to add an image that complements the question. The image is attached below.

Answer:

d. An H atom abd a OH group have been removed drom the reactant

Explanation:

As you can see in the image, the reagent is an alcohol molecule. For the transformation of the alcohol molecule into an alkene molecule, it is necessary that an intramolecular dehydration occurs, that is, it is necessary that a water molecule (two H atoms and an O atom) go out from inside the alcohol and that is exactly what happened, that is, we can say that an H atom and an OH group were removed from the reagent to form the alkene.

Answer:

No it is not soluble

Explanation:

if you were to look at the solubilibity table its not there

Answer:

1900 mmHg.

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 500 mL

Initial pressure (P1) = 760 mmHg

Final volume (V2) = 200 mL

Final pressure (P2) =?

Temperature = constant.

Since the temperature is constant, we shall use the Boyle's law equation to obtain the new pressure as illustrated below:

P1V1 = P2V2

760 × 500 = P2 × 200

Divide both side by 200

P2 = (760 × 500) / 200

P2 = 1900 mmHg

Therefore, the new pressure is 1900 mmHg.

Answer:

The units of both types of energy are Joule (kg × m² × s⁻²).

Explanation:

Step 1: Show the units of kinetic energy

The equation for kinetic energy is:

K = 1/2 × m × v²

where,

m: mass

v: speed

The units are:

K = 1/2 × m × v²

[K] = kg × (m/s)²

[K] = kg × m² × s⁻² = J

Step 2: Show the units of gravitational potential energy

The equation for gravitational potential energy is:

G = m × g × h

where,

m: mass

g: gravity

h: height

The units are:

G = m × g × h

[G] = kg × m/s² × m

[G] = kg × m² × s⁻² = J

Answer:

Explanation:

Relation between ΔG₀ and K ( equilibrium constant ) is as follows .

lnK =  -  ΔG₀ / RT

[tex]K = e^{-\frac{\triangle G_0}{RT}[/tex]

The value of R and T are same for all reactions .

So higher the value of negative ΔG₀ , higher will be the value of K  .

Mg(s) + N₂0(g) → MgO(s) + N₂(g)

has the ΔG₀ value of -673 kJ which is highest negative value . So this reaction will have highest value of equilibrium constant K .

Explanation:

oxygen has a negative charge

sodium has a positive charge

opposites attract

Answer:

Chemical Change

Explanation:

Because it dissolves with the help of saliva , then into stomach and excreted in a different form

Answer:

Yess its a chemical change

:*

Explanation:

Answer:

Because these lights work with a combination of gases that emits a yellow-orange light that reacts with the paint of cars.

Explanation:

The mercury or sodium vapor lights work with a very interesting gas structure that when reacting with each other, emit yellow-orange lights that react with the color of the cars making them appear to have other colors.

When these lights are placed in parking lots, the white cars will turn orange. This is because the white paint used in cars contains particles that emit a yellow-orange spectrum. However, cars of other colors do not have these particles and therefore become black under these lights.

Answer:

The peroxide initiates the free radical reaction

Explanation:

The addition of HBr to alkene in the presence of peroxides occurs via a free radical mechanism.

The organic peroxide acts as the initiator of the free radical reaction. The organic free radical interacts with HBr to produce a bromine free radical which now interacts with the alkene and the propagation steps continue until it is terminated by the coupling of two free radicals.

The peroxide effect leads to anti-Markovnikov addition.

Answer:

13

Explanation:

From the dilution formula;

C1V1 = C2V2

C1= concentration of the stock solution = 0.2 M

V1 = volume of the stock solution = 50.0 ml

C2= concentration of the diluted solution= the unknown

V2= volume of diluted solution= 100 ml

C2= C1V1/V2

C2= 0.2 × 50/100

C2= 0.1 M

But

pOH= -log[OH^-]

But [OH^-] = 0.1 M

pOH= -log [0.1]

pOH= 1

Since;

pH +pOH = 14

pH= 14 - pOH

pH= 14- 1

pH= 13

Answer:

42.75 grams of SiCl2Br2 must be weighed out

Explanation:

Here is the complete question:

An experiment requires that enough SiCl2Br2 be used to yield 13.2g of bromine . How much SiCl2Br2 must be weighed out?

Explanation:

First, we will determine the Molar mass of SiCl2Br2,

Si = 28.08, Cl = 35.45, Br = 79.90

Molar mass of SiCl2Br2 = 28.08 + 35.45(2) + 79.90(2)

= 258.78

Hence, the molar mass of SiCl2Br2 is 258.78 g/mol

If 79.90 grams of bromine is present in 258.78 grams of SiCl2Br2

Then, 13.2 grams of bromine will be present in [tex]x[/tex] grams of SiCl2Br2

[tex]x[/tex] = (13.2× 258.78) / 79.90

[tex]x[/tex] = 42.75 grams

Hence, 42.75 grams of SiCl2Br2 must be weighed out.

Answer:

1.804295

Explanation:

Hope this helps <3

Answer: the molarity of the solution in volumetric flask "B' is 0.0100 M

Explanation:

Given that;

the Molarity of stock solution M₁ = 1.25M

The molarity os solution in volumetric flask A (M₂) = M₂

Volume of stock solution pipet out (V₁) = 5.00mL

Volume of solution in volumetric flask A V₂ = 25.00mL

using the dilution formula

M₁V₁ = M₂V₂

M₂ = M₁V₁ / V₂

WE SUBSTITUTE

M₂ =  ( 1.25 × 5.00 ) / 25.00 mL

M₂ = 0.25 M

Now volume of solution pipet out from volumetric flask A V₂ = 2.00 mL

Molarity of solution in volumetric flask B (M₃) = M₃

Volume of solution in volumetric flask B V₃ = 50.00m L

Using dilution formula again

M₂V₂ = M₃V₃

M₃ = M₂V₂ / V₃

WE SUBSTITUTE

M₃ = ( 0.25 × 2.0) / 50.0

M₃ = 0.0100 M

Therefore the molarity of the solution in volumetric flask "B' is 0.0100 M

The concentration of the final solution is 0.01 M.

This is a problem of serial dilution. We have to first obtain the concentration of  the solution in the new flask.

C1V1 = C2 V2

C1 = concentration of stock solution = 1.25 M

V1 = volume of stock solution =  5.00 mL

C2 = concentration of solution in the new flask = ?

V2 = volume of solution in flask B in the new flask = 25.00 mL

C2 = C1V1 /V2

C2 = 1.25 M ×  5.00 mL/ 25.00 mL

C2 = 0.25 M

Again we need to find the concentration when this solution is further diluted;

C1 = 0.25 M

V1 = 2.00 mL

C2 = ?

V2 = 50.00 mL

C2 = C1V1/V2

C2 = 0.25 M ×  2.00 mL/50.00 mL

C2 = 0.01 M

The concentration of the final solution is 0.01 M.

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Answer:

Electrons are transferred in an ionic bond, whereas they are unequally shared in a polar covalent bond, are equally blank in a nonpolar covalent bond.

Explanation:

An ionic bond involved the transfer of electron(s) from one atom to another. For instance, NaCl is formed by a transfer of one electron from sodium to chlorine.

A polar covalent bond is formed by an unequal sharing of electrons between atoms of different electro negativities. This is the case in polar HCl.

Non polar covalent bonds are formed when electrons are equally shared between two or more atoms such as in CH4.

the answer to it is C...

Answer:

C.

Explanation:

All other questions are opinion-based and can't have a definite answer.

Answer:

m = 0.659 ounce

Explanation:

It is given that,

The thickness of a Teflon coating is, d = 1 mm

Area of the coating, A = 36 inch²

The density of Teflon, d = 0.805 g/mL

We need to find ounces of Teflon are needed.

Firstly, find the volume of the Teflon needed,

1 inch² = 6.4516 cm²

36 inch² = 232.258 cm²

Density,

[tex]\rho=\dfrac{m}{V}[/tex]

V is volume of the Teflon needed, V = Ad

So,

[tex]m=\rho V\\\\m=0.805\ g/cm^3\times 232.258\ cm^2 \times 0.1\ cm\\\\m=18.69\ g[/tex]

Also, 1 gram = 0.035274 ounce

18.69 gram = 0.659 ounce

So, 0.659 ounces of Teflon are needed.

Answer:

Hey!

0.867 + 3.72 + 18.0045 = 22.5915

Explanation:

22.5915 ROUNDED TO 2 significant figures...

2 s.f = 23

(3 s.f = 22.6)

SO ROUNDING TO 2 s.f is easier and more accurate...

ANSWER = 23 (2 s.f)

HOPE THIS HELPS!!

The calculation, rounding your answer to the proper number of significant figures would be 22.60.

0.867 +3.72 + 18.0045 =22.60

In positional notation, significant figures refer to the digits in a number that is trustworthy and required to denote the amount of something, also known as the significant digits, precision, or resolution.

As given in the problem we have to perform the calculation, by rounding the answer to the proper number of significant figures.

0.867 +3.72 + 18.0045 =22.5915

                                      =22.59

                                      =22.60

Thus, the calculation, rounding your answer to the proper number of significant figures would be 22.60.

To learn more about significant figures here, refer to the link;

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#SPJ2

The question is incomplete; the complete question is;

The normal boiling point of acetic acid is 118.1°C. If a sample of the acetic acid is at 125.2°C, predict the

signs of ∆H, ∆S, and ∆G for the boiling process at this temperature.

A. ∆H > 0, ∆S > 0, ∆G < 0

B. ∆H > 0, ∆S > 0, ∆G > 0

C. ∆H > 0, ∆S < 0, ∆G < 0

D. ∆H < 0, ∆S > 0, ∆G > 0

E. ∆H < 0, ∆S < 0, ∆G > 0

Answer:

∆H > 0, ∆S > 0, ∆G < 0

Explanation:

If we look at the question carefully, we will observe that it deals with a phase change from liquid to vapour phase.

Energy is required to break the intermolecular bonds in the liquid as it changes into vapour hence the process is endothermic, ∆H>0.

Also, the entropy of the vapour phase is greater than that of the liquid phase hence there is a positive change in entropy, ∆S>0.

Lastly, the process is spontaneous, hence the change in free energy ∆G is less than zero.

Answer:

H2 > N2 > Ar > CO2

Explanation:

Graham's law explains why some gases efuse faster than others. This is due to the difference i their molar mass. Generally; The rate of effusion of gaseous substances is inversely proportional to the square rot of its molar mass.

This means gases with low molar masses would have higher efusion rate compared to gases with higher molar masses.

So now we just need to compare the molar masses of the various gases;

Ar - 39.95

CO2 - 44.01

H2 - 2

N2 - 28.01

To obtain the order in increasing rate, we have to order the gases in decreasing molar mass. This order of increasing rate is given as;

H2 > N2 > Ar > CO2

Answer:

74.456.6.4.7.5.3.33-6.57

Explanation:

Answer:

6.37 × 10²³ molecules

Explanation:

The molar mass of NaNO₃ = (23 × 1) + (14 ×1) + (16 × 3) = 23 + 14 + 48 = 85 g/mol

Since the fertilizer contains 17.3% sodium nitrate, The number of sodium nitrate in 0.520 kg of fertilizer = 17.3% × 0.520 kg = 0.173 × 520 g = 89.96 g

Number of moles of NaNO₃ in 0.520 kg of fertilizer =  89.96 g / 85 g/mol = 1.0584 moles

Number of molecules of NaNO₃ in 0.520 kg of fertilizer =  1.0584 moles × 6.02 × 10²³ = 6.37 × 10²³ molecules

Answer:

c) Cohesive forces stronger than adhesive forces reduce the height of the liquid in the capillary tube, whereas adhesive forces stronger than cohesive forces increase the height of the liquid.

Explanation:

Two types of forces bring about capillary action.

One is cohesion, which is the intermolecular attraction between like molecules (that is, the liquid molecules). The second force, called adhesion, is an attraction between unlike molecules, such as those in a liquid and in the sides of a glass tube.

If adhesion is stronger than cohesion, the contents of the tube will be pulled upward. This process continues until the adhesive force is balanced by the weight of the liquid in the tube.

Answer:

4.3 × 10⁻⁵ M s⁻¹

Explanation:

Step 1: Given data

Step 2: Write the balanced reaction

NO + O₃ ⇒ NO₂ + O₂

Step 3: Calculate the reaction rate

The rate law is:

rate = k × [NO] × [O₃]

rate = 2.20 × 10⁷ M⁻¹s⁻¹ × 3.3 × 10⁻⁶ M × 5.9 × 10⁻⁷ M

rate = 4.3 × 10⁻⁵ M s⁻¹