Fassst. A or b or c or d plzzz

The change in free energy can help us to discover whether a reaction can be sponteanous or not. The change in free energy fro this reaction is -1.51 kJ/mol.

The change in free energy is referred to as that which determines the spontenity of a chemical reaction. For a spontenous reaction the change in free energy must be negative.

Now;

ΔG = -RTlnK

R = gas constant

T = temperature

K = equilibrium constant

So;

ΔG = -(8.314 * 298 * ln 436)

ΔG = -1.51 kJ/mol

Learn more about free energy: https://brainly.com/question/15319033

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:

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:

Path length is the overall distance traveled following the path of where the object travel. ... Displacement is the distance from the starting point of the object to its final point irregardless where it travels.

Answer:

17.4 L

Explanation:

Step 1: Given data

Step 2: Calculate the volume occupied by 0.775 moles of oxygen at standard temperature and pressure (STP)

At STP, 1 mole of an ideal gas occupies 22.4 L.

0.775 mol × 22.4 L/1 mol = 17.4 L

Answer:

436.8 mmHg.

Explanation:

From the question given above, the following data were obtained:

Total pressure (Pₜ) = 0.93 atm

Pressure of N₂ (Pₙ₂) = 270 mmHg

Pressure of O₂ (Pₒ₂) =?

Next, we shall convert the total pressure to mmHg . This can be obtained as follow:

1 atm = 760 mmHg

Therefore,

0.93 atm = 0.93 × 760 mmHg / 1 atm

0.93 atm = 706.8 mmHg

Finally, we shall determine the pressure of the O₂. This can be obtained as follow:

Total pressure (Pₜ) = 706.8 mmHg

Pressure of N₂ (Pₙ₂) = 270 mmHg

Pressure of O₂ (Pₒ₂) =?

Pₜ = Pₙ₂ + Pₒ₂

706.8 = 270 + Pₒ₂

Collect like terms

706.8 – 270 = Pₒ₂

436.8 = Pₒ₂

Pₒ₂ = 436.8 mmHg

Thus, the pressure of O₂ is 436.8 mmHg

Answer:

The answers to your questions are given below.

Explanation:

1. The symbol of Zinc is Zn

2. Determination of the proton number

Atomic number is simply defined as the number of protons in the nucleus of an atom. Mathematically, it is expressed:

Atomic number = proton number

Atomic number = 30

Therefore,

Proton number = 30

3. Determination of the neutron number

Mass Number = 65

Proton number = 30

Neutron number =?

Mass number = Proton + Neutron

65 = 30 + Neutron

Collect like terms

65 – 30 = Neutron

35 = Neutron

Thus,

Neutron number = 35

4. Determination of the electron number

Since the element is in it's ground state (i.e it has no charge), thus, the number of protons of the element is the same as number of electrons i.e

Electron number = proton number

Proton number = 30

Thus,

Electron number = 30

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:

48%

Explanation:

Based on Gay-Lussac's law, the pressure is directly proportional to the temperature. To solve this question we must assume the temperature increases and all CO2 remains without reaction. The equation is:

P1T2 = P2T1

Where Pis pressure and T absolute temperature of 1, initial state and 2, final state of the gas:

P1 = 10.0atm

T2 = 1420K

P2 = ?

T1 = 730K

P2 = 10.0atm*1420K / 730K

P2 = 19.45 atm

The CO2 reacts as follows:

2CO2 → 2CO+ O2

Where 2 moles of gas react producing 3 moles of gas

Assuming the 100% of CO2 react, the pressure will be:

19.45atm * (3mol / 2mol) = 29.175atm

As the pressure rises just to 24.1atm the moles that react are:

24.1atm * (2mol / 19.45atm) = 2.48 moles of gas are present

The increase in moles is of 0.48 moles, a 100% express an increase of 1mol. The mole percent that descomposes is:

0.48mol / 1mol * 100 = 48%

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:

The cell wall surrounds the plasma membrane and provides the cell tensile strength and protection. ... The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.

hope It Helps U

Please Mark me As brainlist

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:

false im pretty sure.

Answer: sorry I didnt know the answer it wont let me get off

Explanation:

Answer: ³²P

Explanation:

The radionuclide in question is known as Phosphorus-32. It is an isotope of Phosphorus that is radioactive and has one more neutron than the normal phosphorus does.

Phosphorus does not exist in nature and is created artificially by bombarding the normal stable phosphorus with neutrons. Due to its radioactive nature, it has proven to be useful in the medical industry where it has been used to detect eye tumors as well as in treating some diseases.

Answer:

[tex]819 \: g = 819 \times {10}^{ - 3} \: kg = 0.819 \: kg \\ 0.819 \: kg - 0.497 \: kg \\ = 0.322 \: kg[/tex]

Answer:

Your answer is C

Explanation:

When an acid and base react, the acidic hydrogen ion and the basic hydroxide ion in each acid and base neutralize each other and form water. Meanwhile the conjugate base and conjugate acid (the leftover compounds) react to form an ionic molecule, or a salt. (In chemistry, when an anion and a cation form an ionic bond the new molecule is called a salt). Hope this helps!

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: First box----Hail

             Second Box-------Snow

             Thrid Box-------Sleet

              Forth Box-----Rain

Hope that helped! :)

I believe that this statement is true

Answer:

1.1

0.050*0.005

0.00025

Explanation:

Answer:

[tex]C_8H_{10}O_2N_4[/tex]

Explanation:

Hello there!

In this case, according to the given information about the empirical formula of this compound, we can infer that these mole ratios can be rounded to the following whole numbers in order to find the empirical formula:

[tex]C_4H_5ON_2[/tex]

Whose molar mass is 97.09 amu and thus, the ratio of the molecular to the empirical molar mass is:

[tex]200/97.09=2.1[/tex]

Which is almost a factor of 2; and therefore, the resulting molecular formula is:

[tex]C_8H_{10}O_2N_4[/tex]

Regards!

Answer:

0.766atm

Explanation:

Boyles law

P1V1=P2V2

1×635=P2×829

P2=635/829

P2=0.766atm

Answer:

45 and 20 c2 Or4

Explanation:

Answer:

[tex]P_{tot}=465.27torr[/tex]

Explanation:

Hello there!

In this case, according to the given information, it will be possible for us to use the Dalton's law, in order to solve this problem. However, we first need to calculate the mole fraction of oxygen by firstly calculating the moles of each gas:

[tex]n_{H_2}=\frac{14.0g}{2.02g/mol} =6.93mol\\\\n_{N_2}=\frac{84.0g}{28.02g/mol}=3.00mol\\\\n_{O_2}=\frac{64.0}{16.00g/mol} =2.00mol[/tex]

Next, we calculate such mole fraction as follows:

[tex]x_{O_2}=\frac{2}{6.93+3+2} =0.168[/tex]

Then, given the following equation:

[tex]P_{O_2}=P_{tot}*x_{O_2}[/tex]

So we solve for the total pressure as follows:

[tex]P_{tot}=\frac{P_{O_2}}{x_{O_2}} \\\\P_{tot}=\frac{78.00torr}{0.168} \\\\P_{tot}=465.27torr[/tex]

Regards!

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!

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