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Nookie1986 [14]
3 years ago
11

Will mark as Brainliest.

Chemistry
1 answer:
Alex777 [14]3 years ago
6 0
We can use combined gas law,
 PV/T = k (constant)

Where, P is the pressure of the gas, V is volume of the gas and T is the temperature of the gas in Kelvin.
For two situations, we can use that as,
P₁V₁/T₁= P₂V₂/T₂

P₁ = 795 mm Hg
V₁ =  642 mL
T₁ = (273 + 23.5) K = 296.5 K
P₂ = ? 
V₂ = 957 mL
T₂ = (273 + 31.7) K = 304.7 K

From substitution,
795 mm Hg x 642 mL / 296.5 K = P₂ x 957 mL / 304.7 K
                                              P₂ = 548.072 mm Hg                                              

760 mmHg = 1 atm
548.072 mm Hg = 1 atm x (548.072 mmHg / 760 mmHg)
                           = 0.721 atm


Pressure of Oxygen gas is 0.721 atm.


Answer is "A"

Here, we made an assumption that oxygen gas has an ideal gas behavior.
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1. sweep it instead

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Explanation:

4 0
3 years ago
Write the electron configuration for Silicon
morpeh [17]

Answer:

Si₁₄ = 1s² 2s² 2p⁶ 3s² 3p²

Explanation:

Silicon is present in group 14 of periodic table.

It is blue-gray color metalloid.

Its atomic mass is 28 g/mol.

It is mostly used to make allow.

The most important alloy are Al-Si and Fe-Si. These are used to make different machine tools, transformer plates, engine etc.

Its atomic number is 14 and electronic configuration can be written as,

Electronic configuration:

Si₁₄ = 1s² 2s² 2p⁶ 3s² 3p²

The noble gas electronic configuration or abbreviated electronic configuration can also be written.

Si₁₄ = [Ne] 3s² 3p²

The atomic number of neon is 10. Its electronic configuration is,

Ne₁₀ = 1s² 2s² 2p⁶

That's why we write [Ne] for 1s² 2s² 2p⁶ in abbreviated electronic configuration of Si.

5 0
3 years ago
Explain why doesn’t the total pressure increase when more gas is added to the chamber?
german

Pressure is inversely proportional to volume. Therefore, the effect of pressure change is opposite to the effect of volume change. So when more gas is added to the chamber the total pressure of the chamber doesn't increase.

<h3>What are the different relations between pressure and volume?</h3>
  • As the volume changes, the concentrations and partial pressures of both reactants and products change.
  • As the volume decreases, the reaction shifts to the reaction side with fewer gas particles.
  • As the volume increases, the reaction shifts to the side of the reaction containing more gas particles.
  • As the pressure increases, the equilibrium shifts towards reactions with fewer moles of gas.
  • As the pressure decreases, the equilibrium shifts to the side of the reaction with higher moles of gas.
  • Moreover, the pressure change in the system due to the addition of the inert gas is not limited to this.

To know more about Pressure and Volume visit:
brainly.com/question/5018408

#SPJ4

4 0
2 years ago
Help help help help help
luda_lava [24]

The sum is 34.688 m.

If m is a variable, then the m would be attached to 34.688.

7 0
3 years ago
Read 2 more answers
Is atomic weight identical to atomic mass
Oksana_A [137]
Atomic weight is Ar of the atom (what you see on the periodic table)

atomic weight<span> is relative </span>atomic mass, so yeah same thing
3 0
4 years ago
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