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.
Convection currents in air
Explanation:
The convection currents in air tends to blow out winds towards the water at night.
Convection is a mode of heat transfer commonly found in fluids.
It involves the movement of the particles due to differences in temperature and density of the air.
- The land and water heats at different rate.
- The land absorbs and loses heat quickly because it is a good conductor of heat.
- At night, the shore area is cold.
- The air around is very dense and close to the surface.
- This air mass moves towards the surface of the ocean.
- The ocean has high specific heat capacity and takes a long time to heat and cool.
- At night, as it is loosing heat, the air around warms up and rises shifting land ward.
- This movement of cold and dense air from land and the attendant movement of warm air to the land sets up convection currents in the air.
learn more:
Heat transfer in the sun brainly.com/question/1140127
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Answer: The oxygen gas has a pressure of 4 atm if my volume decreases to 1 L.
Explanation:
Given: = 2 L, = 2 atm
= 1 L, = ?
Formula used to calculate the new pressure is as follows.
Substitute the values into above formula as follows.
Thus, we can conclude that the oxygen gas has a pressure of 4 atm if my volume decreases to 1 L.
Gravity
Explanation:
The unpowered cars as shown gets their potential energy from their acceleration due to gravity and the height above the ground of the hill.
Potential energy is the energy due the position or a body. It is energy primarily at rest of a body.
Potential energy = m x g x h
Where:
m = mass
g = acceleration due to gravity
h = height of the hill.
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Potential energy brainly.com/question/10770261
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Plants go through these two main stages:
The gametophyte produces the male and female gametes by mitosis in distinct multicellular structures or figures. When the male and female gametes fuse they forms the diploid zygote, which develops into the sporophyte.