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Answer:
the pressure P= 40.03 bar
Explanation:
The Van der Waals equation states that
P= R*T/(V-b) - a/V²
where
T= absolute temperature = 295 K
V= molar volume = 0.590 L/mol
R= ideal gas constant = 0.082 atm*L/mol*K
a= van der Waals parameter = 1.355 bar⋅dm⁶/mol² * (0.987 atm/bar) * (1 L²/dm⁶) = 1.337 atm ⋅L²/mol²
b= van der Waals parameter = 0.032 dm³/mol *(1 L/dm³) = 0.032 L/mol
then replacing values
P= R*T/(V-b) - a/V² = 0.082 atm*L/mol*K*295 K/( 0.590 L/mol-0.032 L/mol) - 1.337 atm ⋅L²/mol²/(0.590 L/mol)² = 39.51 atm
P= 39.51 atm / (0.987 atm/bar) = 40.03 bar
Answer:
2.48626 x 10^24
Explanation:
We multiple 4.13 by avogadro's number to get that.
Be-beryllium have 2 electrons and it is in the 2 nd period
C.
This is also the only change by which crystals may be produced.
