You are given a small bar of an unknown metal. You find the density of the metal to be 10.5 g/cm3. An X-ray diffraction experime
nt measures the edge of the unit cell as 409 pm. Assuming that the metal crystallizes in a face-centered lattice, what is the metal most likely to be?
A) Pt
B) Pb
C) Rh
D) Ag
E) None of these
A) Pt
B) Pb
C) Rh
D) Ag
E) None of these
2 answers:
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Answer : The number of moles of gas present in container are 1.697 mole.
Explanation :
Using ideal gas equation,
where,
P = pressure of gas = 74 mmHg = 0.097 atm
conversion used : (1 atm = 760 mmHg)
V = volume of gas = 500.0 L
T = temperature of gas =
n = number of moles of gas = ?
R = gas constant = 0.0821 L.atm/mole.K
Now put all the given values in the ideal gas equation, we get the number of moles of gas in the container.
Therefore, the number of moles of gas present in container are 1.697 mole.