Question

$\sf \red{ \underline{question \ \: : }}$
A sample of oxygen occupies 47.2 liters under a pressure of 1240 torr at 25°C. What volume would it occupy at 25°C if the pressure were decreased to
730 torr?

(a) 27.8 L
(b) 29.3 L
(c) 32.3 L
(d) 47.8 L

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Correct and first answer will be marked as brainliest
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Answer 1

$\huge\mathcal{\boxed{\fcolorbox{red}{aqua}{TO\:SEARCH;-}}}$

• The volume that would occupied at 25°C if the pressure were decreased to 730 torr .

$\huge\mathcal{\boxed{\fcolorbox{red}{aqua}{SOLUTION;-}}}$

CASE - 1 ;-

$\begin{cases} {V_1 = 47.2 L} \\ {P_1 = 1240 torr = 1240 mm Hg} \\ {T_1 = 25^{\circ}C = 298 K} \end{cases}$

CASE - 2 ;-

$\begin{cases} {V_2 = ?} \\ {P_2 = 730 torr = 730 mm Hg} \\ {T_2 = 25^{\circ}C = 298 K} \end{cases}$

✴️ We have know that,

$\huge{\color{aqua}\star}$ $\sf\purple{\dfrac{P_1\:V_1}{T_1}\:=\:\dfrac{P_2\:V_2}{T_2}\:}$

$\sf{\leadsto\:\dfrac{P_1\:V_1}{\cancel{T_1}}\:=\:\dfrac{P_2\:V_2}{\cancel{T_2}}\:}$

$\bf{\Big[\:\because\:T_1\:=\:T_2\:=\:25°\:\Big]}$

$\sf{\leadsto\:V_2\:=\:\dfrac{P_1\:V_1}{P_2}\:}$

$\sf{\leadsto\:V_2\:=\:\dfrac{1240\times{47.2}}{730}\:}$

$\sf{\leadsto\:V_2\:=\:\dfrac{58528}{730}\:}$

$\sf\green{\leadsto\:V_2\:=\:80.17\:L}$

So, change in volume is,

→ $\bf{V_2\:-\:V_1}$

→ $\bf{80.17\:-\:47.2}$

→ $\bf\red{32.97\:L\:\approx\:32.3\:L}$

∴ (c) 32.3 L volume that the sample occupied at 25°C if the pressure were decreased to 730 torr .

Answer 2

Answer:

Humus forms as a result of the complicated interplay between inorganic conversions and organic creatures such as microbes, nematodes, and earthworms. Humus formation is carried out in two steps. First, the organic substances and minerals in the soil disintegrate. Next, totally new combinations of these broken-down products develop. This leads to the initial stages of humus. Humus formation is a biological process. Only 4-12 inches (10-30 centimeters) of humus-containing soil are available in the Earth’s upper crust. This thin layer of earth is all that exists to provide nutrition to all human life. The destiny of mankind depends on these 12 inches!