-33⁰C
Step-by-step explanation:
Charles Law states V/T initial = V/T final
T must be in Kelvin.
100/300 = 80/x
(27⁰C + 273 = 300
100x = (300)(80)
100x = 24,000
x = 240⁰K
240 - 273 = -33⁰C
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