Air consists mainly of four gases. One sample taken from Honolulu exerts a total pressure of 760.0 mmHg. Nitrogen exerts 585.2 mmHg, oxygen exerts 144.4 mmHg, and argon exerts 6.8 mmHg. What pressure in mmHg is exerted by water vapor?

Explanation:

hope the picture above make sense:)

We have that the statement that explains why NaCl dissolves in water even though the process is endothermic the given as,

Option A

Generally ,Sodium chloride  is crystalline salt, when  its dissolved is H20 , it dissociates its ion, the ions are scattered through out the solution which results in increased  in randomness .

Therefore, the entropy increases when NaCl dissolves in water,

Option A

For more information on Heat visit

https://brainly.com/question/15267055

Explanation:

Hope u can understand my handwriting:)

Answer:

2 atm

Explanation:

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

Initial volume (V₁) = 16.0 L

Initial pressure (P₁) = 0.5 atm

Final volume (₂) = 4 L

Final pressure (P₂) =?

The final pressure of the gas can be obtained by using the Boyle's law equation as illustrated below:

P₁V₁ = P₂V₂

0.5 × 16 = P₂ × 4

8 = P₂ × 4

Divide both side by 4

P₂ = 8 / 4

P₂ = 2 atm

Thus, the final pressure of the gas is 2 atm

Answer:

79.0 K

Explanation:

Assuming the gas behaves like an ideal gas, we can solve this problem by using the following formula:

Where:

We input the data:

And solve for T:

Answer:

is has around 1/5 lyrics of water

Answer:

[tex]1 \: mole \: = \: 6.02 \times {10}^{23} \: molecules \\ 0.350 \: moles \: = \: (0.350 \times 6.02 \times {10}^{23} ) \: molecules \\ = 2.107 \times {10}^{23} \: molecules[/tex]

Answer:

The solubility of gases depends on the pressure: an increase in pressure increases solubility, whereas a decrease in pressure decreases solubility. This statement is basically Henry's Law, which states that the solubility of a gas in a liquid is directly proportional to the pressure of that gas above the surface of the solution. This can be expressed in the equation:

s=k×Pgas

where s is solubility in M

k is Henry's constant in M/atm

P is the vapor pressure of the gas over the solution

Another way of explaining this is that higher pressures lead to greater force in collisions between the gas particles above the solution and the solution itself. Their average kinetic energy is greater, and their average speeds are greater.  So it is more likely that some of the particles will go into the solution and get dissolved.

Answer:

I WILL ACHIEVE GREATNESS

Explanation:

Answer:

.

Explanation:

Answer:

3. You should walk fast in moving out.

4. You should stay in the evacuation center. Avoid going back to your car, aftershocks may occur.

5. Do not run

Answer:

3. B

4. D

5. A

Explanation:

You are welcome

Answer:

Atoms react with atoms of other elements to form compounds because , every atom wants to attain noble gas configuration . Atoms interact with one another by transferring or sharing electrons that are furthest from the nucleus. These outer electrons govern the chemical properties of the element.

Explanation:

~Hope this helps

Answer:

hope you understand and your answer is correct

Answer: The event air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down would most likely take place over the next few minutes.

Explanation:

A process in which heat is evolved is called an exothermic process.

When hot metal plate at [tex]150^{o}C[/tex] is placed in air at room temperature then heat is given off by the metal plate due to which there will occur a decrease in kinetic energy of its molecules.

As a result, molecules in the metal will slow down.

Whereas heat is absorbed by the air molecules from the metal due to which kinetic energy of air molecules will increase.

Thus, we can conclude that the event air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down would most likely take place over the next few minutes.

When Magnesium comes in contact with Oxygen, it reacts with Oxygen causing a layer of Magnesium Oxide on the metal. If Magnesium is burnt, it will cause a bright white light creating Magnesium Oxide.

The initial appearance of Magnesium is a ribbon with a layer of Magnesium Oxide.

Happy to help :)

If you need any more help feel free to ask

Answer:

that is answer

Explanation:

symbol - elements - mass percent

S. - sulfur. - 21.945%

F. - fluorum. - 78.047%

Answer:

3rd

Explanation:

The coeffecients should be 2, 1, 2.  

Answer:

I think c biological processes

Answer:

3.84 J/g°C

Explanation:

Using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat (J)

m = mass of substance

c = specific heat of copper

∆T = change in temperature (°C).

Based on the provided information;

Q = 43783J

m = 24g

∆T = 500°C - 25°C = 475°C

c = ?

Using Q = m × c × ∆T

43783 = 24 × c × 475

43783 = 11400c

c = 43783 ÷ 11400

c = 3.84 J/g°C

Answer:

C

Explanation:

the sum of calories is 100. When 50 calories are lost, 50 calories is the remainder.

Answer:

2Na (s) +  Cl2 (g) -->2NaCl (s) + heat

Explanation:

Answer:

See Explanation

Explanation:

We can write the molecular orbital configuration of molecules in the same way as we write the orbital electron configuration of atoms. The valence electrons in the molecule are filled into molecular orbitals of appropriate energy in accordance to the Aufbau principle.

For CO;

σ2s2, σ*2s2, Π2py2, Π2pz2, σ2px2

For NO;

σ2s2, σ*2s2, Π2px2, Π2py2, σ2pz2, Π*2px1

For CN-;

σ2s2, σ*2s2, Π2px2, Π2py2, σ2pz2

These are the ground state electron configurations of these molecules.

Answer:

42.24 psi.

Explanation:

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

Initial pressure (P₁) = 29.72 psi

Initial volume (V₁) = 10.22 L

Final volume (V₂) = 7.19 L

Final pressure (P₂) =?

The final pressure can be obtained by applying the Boyle's law equation as follow:

P₁V₁ = P₂V₂

29.72 × 10.22 = P₂ × 7.19

303.7384 = P₂ × 7.19

Divide both side by 7.19

P₂ = 303.7384 / 7.19

P₂ = 42.24 psi

Therefore, the final pressure is 42.24 psi

Explanation:

E=(98-15)×400×4.2

E=139440J

t=E/P

E=139440/500=278.88s

hope it helps❣️

don't forget to mark me as brainliest and follow❣️

Answer:

true

Explanation:

Answer:

i think A is the correct answer

Answer:

i have the same paper im working on now taking me forever u got the answers?

Explanation:

Answer: The enthalpy change during this reaction is 77505.56 J.

Explanation:

Given: [tex]T_{1} = 14^{o}C[/tex],         [tex]T_{2} = 87^{o}C[/tex]

Mass = 254 g,       Specific heat = [tex]4.18 J/g^{o}C[/tex]

Formula used to calculate the enthalpy change is as follows.

[tex]q = m \times C \times (T_{2} - T_{1})[/tex]

where,

q = enthalpy change

m = mass of substance

C = specific heat capacity

[tex]T_{1}[/tex] = initial temperature

[tex]T_{2}[/tex] = final temperature

Substitute the values into above formula as follows.

[tex]q = m \times C \times (T_{2} - T_{1})\\= 254 g \times 4.18 J/g^{o}C \times (87 - 14)^{o}C\\= 77505.56 J[/tex]

Thus, we can conclude that the enthalpy change during this reaction is 77505.56 J.

Answer:

1) 1.5 kg

2) 0.6 kg

Explanation:

[tex](3)(30) = 60m, m = 90/60 = 1.5[/tex] kg

[tex](0.8)(15) = 20m, m = 12/20 = 0.6[/tex] kg

Answer:

[Ba²⁺] = 1.58 × 10⁻³ M

[Cl⁻] = 3.16 × 10⁻³ M.

Explanation:

Step 1: Calculate the molar concentration of BaCl₂

We have 3.50 mL (V₁) of a 0.00450 M (C₁) BaCl₂ solution and we dilute it to a final volume of 10.00 mL (V₂). We can calculate the final concentration of BaCl₂ by using the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁ / V₂

C₂ = 0.00450 M × 3.50 mL / 10.00 mL = 1.58 × 10⁻³ M

Step 2: Calculate the molar concentrations of the Ba²⁺ and Cl⁻ ions

Let's consider the dissociation of BaCl₂.

BaCl₂(aq) ⇒ Ba²⁺(aq) + 2 Cl⁻(aq)

The molar ratio of BaCl₂ to Ba²⁺ is 1:1. The molar concentration of Ba²⁺ is 1/1 × 1.58 × 10⁻³ M = 1.58 × 10⁻³ M.

The molar ratio of BaCl₂ to Cl⁻ is 1:2. The molar concentration of Cl⁻ is 2/1 × 1.58 × 10⁻³ M = 3.16 × 10⁻³ M.