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neonofarm [45]
2 years ago
12

a sample of ideal gas at room temperature occupies a volume of 12.0 L at a pressure of 392 torr. if the pressure changes to 1960

torr, with no change in temperature or moles of gas, what is the new volume, V2?
Chemistry
1 answer:
Setler79 [48]2 years ago
3 0
852 x 40.0= 4260 x v2 
<span>v2= 8 L </span>

<span>b) 852 x 40 = p2 x 69.0 </span>
<span>p2= 494 torr</span>
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Expressed in scientific notation(6.0 x 104) (3.1 x 10-1) =
levacccp [35]
The answer would be 1.86 x 10^4
4 0
3 years ago
Lab safety is not only important in the classroom, but it is also important to follow
defon

Answer:

Follow safety measures and safety rules to avoid any accident.

Explanation:

1. Follow all safety measures is needed from adults when they conducting any experiment at home in order to prevent any damage occurs due to that experiment.

2. Safety rules should always be followed when conducting an experiment at any place such as at home, class room and laboratory etc in order to avoid any accident.

3. Some chemicals are very dangerous because they are flammable and catch fire when allow it to the heat source. Some chemicals also cause suffocation by absorbing all the oxygen from the environment and as a result death occurs.

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4 0
3 years ago
A sample of gas has a volume of 2.00 L and a pressure of 0.750 kPa when its
Gennadij [26K]

Answer:

The final temperature is 397 K.

Explanation:

Boyle's law relates volume and pressure by expressing:

"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

P * V = k

where k is a constant.

Charles's Law consists of the relationship between the volume and the temperature of a certain amount of ideal gas, which is kept at a constant pressure. This law states: "At constant pressure, the volume that a gas sample occupies is directly proportional to the temperature"

So, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio between the volume and the temperature will always have the same value:

\frac{V}{T}=k

Finally, Gay-Lussac's law establishes the relationship between pressure and temperature of a gas when the volume is constant. This law states that the pressure of a fixed volume of a gas is directly proportional to its temperature. That is, if the volume of a certain quantity of ideal gas at moderate pressure is kept constant, the quotient between pressure and temperature remains constant.

\frac{P}{T}=k

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law. So, you have:

\frac{P*V}{T}=k

Supposing you have a gas that is at a pressure P1, at a volume V1 and at a temperature T1 at the beginning of the experiment, by varying the temperature to a new value T2, then the pressure will change to P2 and the volume to V2, and will fulfill:

\frac{P1*V1}{T1}=\frac{P2*V2}{T2}

In this case, you have:

  • P1= 0.750 kPa
  • V1= 2 L
  • T1= 25°C= 298 °K (being 0°C=273°K)
  • P2= 0.500 kPa
  • V2= 4 L
  • T2= ?

Replacing:

\frac{0.750 kPa* 2 L}{298 K}=\frac{0.500 kPa*4 L}{T2}

and solving you get:

T2=\frac{0.500 kPa*4 L}{\frac{0.750 kPa* 2 L}{298 K}}

T2= 397 K

<u><em>The final temperature is 397 K.</em></u>

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2 years ago
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Answer:

decanting

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solvent

Explanation:

Gravity filtration consists of a pump and a filter (to be placed outside the basin, above the water level). The pump is placed in the water. Connected by a hose to the filter, water is sucked up to the device.

In the gravity-type configuration, water is sucked into the filter, which causes an imbalance between the levels of the basin and the filter: this imbalance causes the movement of water - with the dirt - from the basin to the filter via the main drain and the skimmer.

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1. Which of the following species exhibit tetrahedral geometry?
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Answer:

a

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