Answer:
Total partial pressure, Pt = 821 mm Hg
Partial pressure of Helium, P1 = 105 mm Hg
Partial pressure of Nitrogen, P2 = 312 mm Hg
Partial pressure of Oxygen, P3 = ? mm Hg
According to Dalton's law of Partial pressures,
Pt = P1 + P2 + P3
So, <u>P3 = 404 mm Hg</u>
((|Vtrue-Vobserved|) / (Vtrue)) x 100
1.77777%error
Answer:
NO OF NEUTRON =MASS NO -ATOMIC NO
=39-19
=20
bcz atomic no is equal to no of electrons
mark as brainliest
my answer here would be A. Hope this helps
