In the titration, 15 mL of CsOH solution is neutralized by 38.2 mL of 0.250 M HBr solution. What is the molarity of the CsOH solution?

Molarity of acid=2.5M

pH=5.1.

ka=?

Now

We need to write an eqn to show the dissociation of the acid

HA + H2O === H3O+ + A-

Writing The Equilibrium(Or Acid dissociation constant) of this reaction

Ka =[H3O+] {A-]/ {HA].

The concept behind this is

concentration of Products divided by those of reactants. Water is not written because its a pure liquid and does not affect the Equilibrium constant.

Now If you have any Idea on ICE tables..

You'd know that the concentration of acid will decrease by 2.5-x

Whilst the products...will increase by x each

Note: This is when the ratio of their Moles are in 1:1

ka= x.x/2.5-x

Since the Moles of A- and H3O+ are in 1:1... Their concentrations at equilibrium will be the same

so

Ka= x²/2.5-x

Now what is x??

x is the Hydrozonium ion concentration.

we can get it from the pH formula

pH= -log (H3O+)

Making H3O+ subject by applying Logarithm Rules

H3O+ = 10^-ph

x=10^-5.1

=7.94x10^-6.

Now back to Ka

Ka= x²/2.5-x

Ka= (7.94x10^-6)²/2.5-(7.94x10^-6)

Ka= (7.94x10^-6)²/2.4999

Ka= 2.52x10^-11.

Was a Fun One

The ionization constant of this weak acid is [tex]2.52*10^{-11}[/tex]. The values can be substituted in dissociation formula.

What information do we have?
Molarity of acid=2.5M

pH=5.1

To find:

ka=?

[tex]HA + H_2O < === > H_3O^+ + A^-[/tex]

The value of dissociation constant will be:

[tex]Ka =[H_3O^+] [A^-]/ {HA][/tex]

The Moles of A- and H3O+ are in 1:1.Their concentrations at equilibrium will be the same.

[tex]Ka= x.x/2.5-x\\\\Ka= x^2/2.5-x\\\\pH= -log (H_3O^+)\\\\H_3O^+ = 10^{-pH}\\\\x=10^{-5.1}\\\\x=7.94*10^{-6}[/tex]

[tex]Ka= x^2/2.5-x\\\\Ka= (7.94*10^{-6})^2/2.5-(7.94*10^{-6})\\\\Ka= (7.94*10^{-6})^2/2.4999\\\\Ka= 2.52*10^{-11}\\\\[/tex]

Thus, ionization constant of this weak acid is [tex]2.52*10^{-11}[/tex].

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Answer:

643g of methane will there be in the room

Explanation:

To solve this question we must, as first, find the volume of methane after 1h = 3600s. With the volume we can find the moles of methane using PV = nRT -Assuming STP-. With the moles and the molar mass of methane (16g/mol) we can find the mass of methane gas after 1 hour as follows:

Volume Methane:

3600s * (0.25L / s) = 900L Methane

Moles methane:

PV = nRT; PV / RT = n

Where P = 1atm at STP, V is volume = 900L; R is gas constant = 0.082atmL/molK; T is absolute temperature = 273.15K at sTP

Replacing:

PV / RT = n

1atm*900L / 0.082atmL/molK*273.15 = n

n = 40.18mol methane

Mass methane:

40.18 moles * (16g/mol) =

Answer:

The thermal efficiency of an engine is [tex]0.15[/tex] that is 15%

Explanation:

Specific heat of a gas at constant volume is

[tex]C_{v}=\frac{fR}{2}[/tex]

here, [tex]f=[/tex]degree of freedom

[tex]R=[/tex]universal gas constant

Thermal efficiency of a cycle is

[tex]\frac{total workdone}{gross heat absorbed}[/tex]

Gross heat absorbed is amount of heat that absorbed.

ω[tex]=P_{o} V_{o}[/tex]

[tex]Q_{AB}=[/tex]Δ[tex]V_{AB}+[/tex]ω[tex]_{AB}[/tex][tex]=nC_{v}(T_{f}-T_{i} )[/tex]

       [tex]=n\frac{f}{2}(RT_{f}-RT_{i} )[/tex][tex]=\frac{f}{2}(P_{o}V_{o} )[/tex]

[tex]Q_{BC}=n(\frac{f}{2}+1 )R(T_{f}-T_{i} )[/tex]

       [tex]=(\frac{f}{2} +1)(4P_{o}V_{o}-2P_{o}V_{o} )[/tex]=[tex]=(\frac{f}{2}+1)2P_{o}V_{o}[/tex]

[tex]Q_{CD}=-ve and Q_{DA}=-ve[/tex]    these 2 are not the part of gross heat

η[tex]=\frac{P_{o}V_{o} }{(\frac{3f}{2}+2 )(P_{o}V_{o})}[/tex]

  [tex]=\frac{1}{(\frac{3f}{2}+2 )}[/tex]

For monoatomic gas [tex]f=3[/tex]

η[tex]=\frac{2}{13}[/tex]

  [tex]=0.15[/tex]

Answer:

22 neutrons

Explanation:

If so please sorry

Answer:

Ca - 66%, P - 34%

Explanation:

So, this is the formula we can use to find the amount of each element:

Element count * Atomic mass = Mass

Plug in our elements for this:

Ca - 3*40.078=120.234

P - 2*30.973=61.946

Now, to find the percentage of mass, we must find total mass, and divide the two elements mass count by this total mass:

120.234+61.946=182.18

Now divide each element mass by the total mass:

Ca - 120.234/182.18=0.6599(Round to 0.65)

P - 61.946/182.18=0.34002(Round to 0.34)

Then multiply both numbers by 100 to get the percentage:

Ca - 65%

P - 34%

So these our your two answer!

Hope this helps!

Answer:

false im pretty sure.

Answer:

We will need two potassium ions to balance the charge on the sulfate ion, so the proper chemical formula is K 2SO 4.

Explanation:

hope this helps

Answer: D

Explanation:

liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Answer:

D. A liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

Answer:

0.921 moles

Explanation:

1.91 M means 1.91 moles/liter

482 mL = 0.482 L

0.482 L × 1.91 moles/liter = 0.92062 moles

Answer: 2)gas syringe

Explanation:

the volume of a gas is usually measured with a gas syringe (or sometimes with an upside-down measuring cylinder)

Answer:

top pan balance

Explanation:

Answer:

B. strong base titration with a strong acid

[tex]\huge\color{yellow}\boxed{Answer:}[/tex]

My answer is C.Its particles slide past one another

[tex]\huge\color{yellow}\boxed{toshiro hitsugaya}[/tex]

When the  6 liters volume of the substance takes up 12 liter container, we conclude that the substace is highly compressible.

Compressibility is the measure of the relative volume change of a solid or a fluid with respect to pressure change.

Gases are the most compressible susbtance because most of the volume of a gas is composed of the large amounts of empty space between the gas particles.

Therefore, when the  6 liters volume of the substance takes up the entire volume of 12 liter container, we can conclude that the substace is highly compressible.

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Answer:

2-pentene

Explanation:

The name of the alkene is 2 pentene. The correct option is B, 2-pentene.

Alkenes with the chemical formula [tex]C_5H_10[/tex] are known as pentene. Within its molecular structure, each has one double bond.

The given alkene [tex]CH_3CH = CHCH_2CH_3[/tex] is 2-pentene because the double bond is present in the second carbon and it's pentene because there are five carbons present.

Thus, the correct option is B. 2-pentene.

Learn more about 2-pentene

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Answer: more than 70,00 and most of that population is living on the streets

Answer:

Our bodies convert chemical energy in our food into mechanical energy for us to move.

An electric fan transforms electrical energy into kinetic energy

Reword it tho

Hope this helps!!

Answer: First box----Hail

             Second Box-------Snow

             Thrid Box-------Sleet

              Forth Box-----Rain

Hope that helped! :)

Answer:

0.086

Explanation:

The formula for calculating the fraction of a covalent bond can be expressed as:

= exp (-0.25ΔE²)

[tex]= exp[-0.25(E_{Al}-E_{p})^2]---(1)[/tex]

from the equation above;

[tex]E_{Al}[/tex] = the electronegativity of aluminum

[tex]E_P[/tex] = electronegativity of phosphorus

Using the data from periodic table figures;

[tex]E_{Al}[/tex] = 1.5

[tex]E_P[/tex] = 2.1

∴

fraction of the covalent = exp[-0.25(1.5 - 2.1)²]

fraction of the covalent = exp(-0.09)

fraction of the covalent = 0.914

Now, the fraction of ionic bond will be = 1 - the fraction  of covalent bond

= 1 - 0.914

∴

the fraction of bond that is ionic = 0.086

Answer: A.) 2 is the answer.

Explanation:

Answer:

0.004235 M

Explanation:

The neutralization reaction of this question is given as follows:

Mg(OH)2 + 2HCl → MgCl2 + 2H2O

Using the formula below:

CaVa/CbVb = na/nb

Where;

Ca = concentration of acid (M)

Cb = concentration of base (M)

Va = volume of acid (mL)

Vb = volume of base (mL)

na = number of moles of acid = 2

nb = number of moles of base = 1

From the information provided in this question;

Ca = ?

Cb = 0.00125 M

Va = 425 mL

Vb = 720 mL

na (HCl) = 2

nb = (Mg(OH)2) = 1

Using the formula; CaVa/CbVb = na/nb

Ca × 425/0.00125 × 720 = 2/1

425Ca/0.9 = 2

472.2Ca = 2

Ca = 2/472.2

Ca = 0.004235 M

Answer:

C₅H₈O₂

Explanation:

methyl methacrylate = 100 amu

6.91g CO₂ = 0.157 moles

2.26g H₂O = 0.125 moles

0.157 ÷ 0.125 = 1.256

{(CO₂)₁.₂₅₆ + (H₂O)₁} × 4 = (CO₂)₅ + (H₂O)₄

C₅H₈O?

C₅ = 60.05 amu H₈ = 8.064 amu

60.05 + 8.064 = 68.114 amu

100 amu - 68.114 amu = 31.886 amu

O = 16 amu

O = 2

The molecular formula of methyl methacrylate is C₅H₈O₂. The correct option is A, C₅H₈O₂.

What is methyl methacrylate?

Methyl methacrylate (MMA) is a colorless liquid monomer with a distinctive fruity odor. It is an organic compound that belongs to the family of acrylic esters.

We have to determine the empirical formula of methyl methacrylate first and then multiply it by the integer n to determine the molecular formula. Empirical formula:

CO₂ and H₂O are the combustion products of methyl methacrylate.

C₅H₈O₂ + (9n / 2)

O₂ → 5CO₂ + (n)H₂O

There are 5 C atoms and (8 + 2n), H atoms in the left and 5 C atoms, and n H atoms in the right.

5C = 5C, and 8 + 2n = nH.

n = 6

Molecular formula calculation is dividing the molecular weight by the empirical formula weight to determine the multiplication factor.

C₅HₙO₂ (empirical formula) has a weight of:

(5 x 12.011) + (8 x 1.008) + (2 x 15.999) = 100.12 g/mol

The actual molecular weight of methyl methacrylate is 100 g/mol.

Therefore, the molecular formula is (C₅H₈O₂) x 1, which is C₅H₈O₂, option A.

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Answer:

0.766atm

Explanation:

Boyles law

P1V1=P2V2

1×635=P2×829

P2=635/829

P2=0.766atm

Answer:

The answer is "Tetrahedral".

Explanation:

The carbon atom of approximately [tex]109.5^{\circ}[/tex] with four attachments. Its general form is one of a tetrahedron: a polyhedron consisting of 4 triangular sides, six straight edges, and four vertex corners from all faces equilateral triangles. The triangular pyramid is often referred to as the triangular pyramid.

Answer:

exothermic

Explanation:

Answer:

well please answer me it's question too after you get it

Explanation:

i am also stucked in that question

No. of molecules of any substance is one mole

= Avogadro's Number = (6.022 x 10^23)

So, no. of molecules in 7.2 moles of sodium fluoride

= 7.2 × (6.022 x 10^23)

= 4.33584^24

Answer:

It's

Explanation:

Pbo + c

= pb + co2

While balancing it becomes

2pbo + c = 2pb + co2

(I was also doing same qn)

Answer:

Inactive metals are inert metals that doesn’t react with most of the chemicals.They are highly resistant to oxidation and corrosion when exposed to moisture.

Explanation:

Answer:

B. It gains energy in a quantized amount. ​

Answer:

[tex]T_2=894.45K=621.30\°C[/tex]

Explanation:

Hell there!

In this case, according to the given information, it turns out possible for us to calculate the new temperature by applying the Charles' law as a directly proportional relationship between temperature and volume:

[tex]\frac{V_2}{T_2} =\frac{V_1}{T_1}[/tex]

Thus, we solve for the final temperature, T2, as shown below (make sure T1 is in Kelvins):

[tex]T_2=\frac{V_2T_1}{V_1} \\\\T_2=\frac{(25+273.15)K*45L}{15L}\\\\T_2=894.45K=621.30\°C[/tex]

Regards!