Let's assume that O₂ is an ideal gas.
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 = <span>795 mm Hg
</span>V₁ = <span> 642 mL
</span>T₁ = (273 + 23.5) K = 296.5 K
P₂ = ?
V₂ = <span>957 mL
</span>T₂ = (273 + 31.7) K = 304.7 K
By applying the formula,
795 mm Hg x 642 mL / 296.5 K = P₂ x 957 mL / 304.7 K
P₂ = 548.07 mm Hg
P₂ = 548 mm Hg
760 mmHg = 1 atm
548 mm Hg = 1 atm x (548 mmHg / 760 mmHg) = 0.721 atm
Pressure of gas = 548 mm Hg = 0.721 atm
its A, calcium chloride has a higher boiling point than sucrose
Solution: There are major three phases of substance, namely solid, liquid and gas.
Here, solid substances have definite shape, they are rigid and can not change their volume or shape if kept in any container.
Liquid substances do not have any shape of their own, they take shape of the container in which they are kept. They are compressible in nature.
Gaseous substances also do not have their own shape, the molecules of gas continuously move in the container in which they are stored. Gases are highly compressible in nature.
Here, a substance when placed in a 100-mL square box have spherical shape and 50 mL volume. The shape and volume of the substance do not change when it is placed in a 100-mL circular tube, that means it does not change the shape with change of container and the state of substance will be solid.
<h2>The answers are
and
</h2>
Explanation:
Given -
a) The molecular formula of ethylene glycol -
∴ The empirical formula of ethylene glycol will be -
Given -
b) The molecular formula of per-oxo-disulfuric acid (a compound used in bleaching agents) -
∴ The empirical formula of per-oxo-disulfuric acid will be -
Hence, the answers are and .
The elements of heavy metals are used to absorb electrons in electron-dense stains.
<h3>
What are heavy metals?</h3>
A heavy metals are generally defined as metals with relatively high densities, atomic weight and atomic number.
They toxic and poisonous in nature. They occurs naturally and are very essential to life.
Arsenic, cadmium, lead, copper, nickel and mercury are the most commonly used heavy metals.
Electron staining means to absorb heavy metals of high scattering power to biological specimens which exhibit a small scattering power for electrons.
Thus, the elements of heavy metals are used to absorb electrons in electron-dense stains.
To learn more about heavy metals, refer to the link below:
brainly.com/question/3937595
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