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ycow [4]
3 years ago
13

A gas sealed in a drum container occupies 7.70 L at a sizzling 325C degrees. What will the volume be if the drum is quickly chi

lled at 9C degrees.
Chemistry
1 answer:
grigory [225]3 years ago
3 0

The volume of the drum after chilled quickly is 3.6 L.

<u>Explanation:</u>

As per the Charles Law, for any gas at constant pressure, volume of the gas is in direct proportion with the temperature measured in Kelvin. As the temperature increases, the gas expands and vice versa.

$\frac{V1}{T1} = \frac{V2}{T2} \\

After chilling the drum, the volume will get reduced and it can be found as,

V2 = $\frac{V1T2}{T1}

     = $\frac{7.7 L \times 282 K}{598 K}

      = 3.6 L

Here the drum is chilled quickly, that is temperature is reduced and so the volume also decreases.

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4. Which of the following statements is true?
Aleksandr [31]

4) The answer is: Chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not.

Differences between nuclear and chemical reactions:

1) The electrons of an atom participates in a chemical reaction and protons in nuclear reaction.

2) Chemical reactions involve the rearrangement of electrons, because there is transfer, loss, gain and sharing of electrons in chemical reactions.

3) Nuclear reactions can produce new elements, because number of protons and neutrons is changed, chemical reactions donot produce new element.

4) Chemical reactions require heat or an input of energy to occur, this is activation energy.

5) Isotopes of the same element behave differently in a nuclear reaction, because isotopes have different number of neutrons, so products of a nuclear reaction is different.

6) The answer is: nuclear change.

Transmutation is a process that involves a change in the nucleus of an atom. It can be natural or artificial.  

For example: 14/7 N + 4/2 He --> 17/8 O + 1/1 H.  

This example is the first artificial nuclear transmutation described by Rutherford in 1919.  

Artificial transmutation can be expressed by nuclear reaction:  

Target Nuclide + Bombardment Particle → New Nuclide + Ejected Particle.  


5 0
3 years ago
The cap-like ________ covers the head of the sperm and releases enzymes that will help the sperm penetrate the egg.
Licemer1 [7]

The cap-like acrosome covers the head of the sperm and releases enzymes that will help the sperm penetrate the egg.

<h3>What is acrosome?</h3>

The acrosome is a unique membrane organelle found over the anterior region of the sperm nucleus that has been largely preserved throughout evolution. This acidic vacuole includes a number of hydrolytic enzymes that, when produced, aid sperm penetration of the egg covers.

<h3>What is acrosome made of?</h3>

The acrosome is formed from the Golgi complex of the spermatid. The acrosome is made up of a protein matrix core and multiple hydrolytic and glycolytic enzymes that are essential for fertilization.

To know more about acrosome visit:

brainly.com/question/16245783

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7 0
2 years ago
Please help!!! Thank you
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8 0
3 years ago
Acetylene gas (c2h2) reacts with oxygen gas (o2) to produce carbon dioxide (co2) and water vapor (h2o). how many liters of c2h2
MissTica
According to the balanced equation of the reaction:

2C2H2 + 5O2 → 4CO2 + 2H2O

So we can mention all as liters,

A) as we see that 2 liters of C2H2 react with 5 liters of oxygen to produce 4 liters of CO4 and 2 liters of H2O 

So, when we have 75L of CO2

and when we have 2 L of C2H2 reacts and gives 4 L of CO2

 2C2H2 → 4CO2 

∴ The volume of C2H2 required is:

                    = 75L / 2

                    = 37.5 L

B) and, when we have 75 L of CO2


and 4CO2 → 2H2O 

∴ the volume of H2O required is: 
                               
                            = 75 L /2
                            = 37.5 L 


C) and from the balanced equation and by  the same way:

when 5 liters O2  reacts to give 4 liters of CO2

and we have 75 L of CO2:

5 O2 → 4 CO2 

   ??  ←  75 L

∴ the volume of O2 required is:

                              = 75 *(5/4)

                              = 93.75 L



D) about the using of the number of moles the answer is: 

no, there is no need to find the number of moles as we called everything in the balanced equation by liters and use it as a liter unit to get the volume, without the need to get the number of moles.
6 0
3 years ago
Read 2 more answers
What frequency is radiation with a wavelength of 5.00 x 10^-6 cm? In what region of the electromagnetic spectrum is this radiati
astra-53 [7]

Answer:

f = 6 × 10^15 Hz in the ULTRAVIOLET (UV) region

Explanation:

Using λ = v/f

Where;

λ = wavelength (m)

v = speed of light (3 × 10^8m/s)

f = frequency (Hz)

According to this question, λ = 5.00 x 10^-6 cm

= 5.00 x 10^-8 m

λ = v/f

f = v/λ

f = 3 × 10^8 ÷ 5.00 x 10^-8

f = 0.6 × 10^(8+8)

f = 0.6 × 10^16

f = 6 × 10^15 Hz

In the electromagnetic spectrum (EM), a frequency of 10^15 is found in the ULTRAVIOLET region. This means that this radiation with a wavelength of 5.00 x 10^-6 cm and frequency of 6 × 10^15 Hz is in the ULTRAVIOLET region of the EM spectrum.

7 0
3 years ago
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