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3 years ago

I WILL GIVE OUT BRAINLIEST IF CORRECT

Chemistry

2 answers:

aivan3 [116]3 years ago

8 0

The answer is D.

The reason that I say the answer is D is because it includes information about how pumping the air into the ball is a closed system meaning that the Kinetic energy is going to collide due to being forced into the ball, and once the space is full, then it has collided.

_______________________________________________________

Hope this helps.

-Northstar

ololo11 [35]3 years ago

7 0

Answer:

the answer is D my friend

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Enter your answer in the provided box. The vapor pressure of ethanol is 1.00 x 10² mmHg at 34.90°C. What is its vapor pressure a

zavuch27 [327]

Answer:

2,54x10² mmHg

Explanation:

To solve this problem you can use Clausius-Clapeyron equation that serves to estimate vapor pressures or temperatures:

$Ln(\frac{P_{2}}{P_{1}} ) =\frac{ deltaH_{vap}}{R} (\frac{1}{T_{1}}-\frac{1}{T_{2}} )$

Where:

P1 is 1,00x10² mmHg

ΔHvap is 39,3 kJ/mol

R is gas constant 8,314x10⁻³ kJmol⁻¹K⁻¹

T1 is 34,90°C + 273,15 = 308,05 K

T2 is 54,81°C + 273,15 = 327,96 K

Thus:

$Ln(\frac{P_{2}}{1,0x10^{2}mmHg}) =\frac{39,3kJ/mol}{8,314x10^{-3}kJ/molK} (\frac{1}{308,05K}-\frac{1}{327,96K} )$

Thus, P2 is 2,54x10² mmHg

I hope it helps!

3 0

4 years ago

What is Dark Matter? someone pls tell me. grand reward

Nutka1998 [239]

Answer:

Dark matter is nonluminous material that is postulated to exist in space and that could any of Several form including weakly interacting particles.

Explanation:

dark matter is basically composed of particles that do not absorb, reflect or emit light, so they can't be detected by observing electromagnetic radiation.

5 0

2 years ago

List two products derived from ethylene

laiz [17]

Ethylene is the starting material for the preparation of a number of two-carbon compounds including ethanol (industrial alcohol), ethylene oxide (converted to ethylene glycol for antifreeze and polyester fibres and films), acetaldehyde (converted to acetic acid), and vinyl chloride (converted to polyvinyl chloride).

8 0

2 years ago

Grignard reagents are air-and moisture-sensitive. List at least threereactants, solvents, and/or techniques that were utilized i

Evgesh-ka [11]

<h2>Diethylether (DTH) andTetrahydrofuran (THF).</h2>

Explanation:

Grignard reactions reacts with water forming alkanes.
The water present causes the reagent to decompose rapidly.

So, the solvents which are utilized in the experimental procedure to minimize exposure of the grignard reagents to air and/ormoisture are solvents such as anhydrous diethyl ether or tetrahydrofuran(THF), poly(tetramethylene ether) glycol (PTMG).

The reason for the use of these solvents is the oxygen present in these solvents stabilizes the magnesium reagent.

THF (Tetrahydrofuran) is a stable compound.

4 0

4 years ago

How much potassium nitrate has to dissolve in water to absorb 105 kj of heat? there are 4.184 kj/kcal. also note the answer is t

joja [24]

Lattice energy of potassium nitrate (KNO3) = -163.8 kcal/mol

Hydration energy of KNO3 = -155.5 kcal/mole

Heat of solution is the amount of heat absorbed by water when 1 mole of KNO3 is dissolved in it

Heat of solution = Hydration energy - Lattice energy

= -155.5 -(-163.8) = 8.3 kcal/mol

1 kcal/mol = 4.184 kJ/mole

Therefore, 8.3 kcal/mole = 4.184 * 8.3 = 34.73 kJ/mol

Now, 34.73 kJ of heat is absorbed when 1 mole of KNO3 is dissolved

The given 105 kJ of heat would correspond to : 105/34.73 = 3.023 moles of KNO3

Molar mass of KNO3 = 101.1 g/mole

Mass of KNO3 = Molar mass * moles

= 101.1 * 3.023 = 305.63 g = 0.3056 kg

8 0

4 years ago