8.86 In problem 8.85, the balloon reached an altitude of 1000 m, where the pressure was 658 mmHg and the temperature was
-8°C. What was the volume, in liters of the balloon at these
conditions, if the amount of gas does not change? (8.5)

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

it's all four options.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer