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Answer:
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Answer:-
Phosphorus
Explanation:-
In the third period among the elements given, phosphorus is at the most right side among them in the periodic table.
We know that as we go from left to right in the periodic table, the atomic size decreases due to the increase in nuclear charge.
Hence phosphorus is the smallest among them
Answer:
14 moles
Explanation:
For an Ideal gas,
PV = nRT...................... Equation 1
Where P = Pressure, V = Volume, n = number of mole, R = Molar gas constant.
make n the subject of the equation
n = PV/RT.................. Equation 2
Given: P = 14.297 atm, V = 22.9 L = 22.9 dm³, T = 12 °C = (12+273) K = 285 K.
Constant: R = 0.082 atm.dm³/K.mol
Substitute these values into equation 2
n = (14.297×22.9)/(285×0.082)
n = 327.4013/23.37
n = 14.009
n ≈ 14 moles
