Answer:
113 mL
Explanation:
Let's apply the Ideal Gases Law for this propose:
P . V = n . R .T → (n. R . T) / P = V
We need to convert the T° to Absolute T° and pressure from mmHg to atm
T° K = 30°C + 273 = 303K
485 mmHg . 1atm / 760 mmHg = 0.638 atm
Let's replace the information obtained:
V = (n . 0.082 . 303K) / 0.638 atm
n = number of moles → 0.128 g . 1mol / 44g = 0.00291 moles
V = (0.00291 moles . 0.082 . 303K) / 0.638 atm → 0.113 L
The value can be written as 113 mL
