The one deci cubic meter of unknown gas with weight of 1.25 grams as the possible formula is N₂.
NTP stands for normal temperature pressure. At NTP, pressure is equal to 1 a t m and temperature is equal to 293 K. Under these conditions, the volume of 1 mole of gas is 24.0548 liters.
To obtain the possible formula:
Given,
Weight of gas = 1.25g
V = 1L
At N.T.P,
Volume of gas = 22.4 L for 1mole
24 L of gas⟶1 mole of Gas
1 L of gas ⟶ 1/ 22.4
A mole of Gas⟶0.0446mole
= 0.0446 mole
we know, n = x/Mmole
= mass/ molar mass
M = x/n
= 1.25/0.0446
=28.0228.02 ≃ 28 gram
Thus, the possible formula is N₂, since nitrogen has an atomic mass of 28.
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