The melting point and boiling point for this compound may be 60°C and 120°C .
The question is incomplete, the complete question is;
A compound is a liquid at 200°F. Which pair represents the correct melting point and boiling point for this compound?
10°C and 90°C
100°C and 250°C
-40'C and 80°C
60°C and 120°C
-20°C and 70°C.
Now using the formula;
F - 32/9 = °C /5
Making °C the subject of the formula;
°C = 5 (F - 32/9)
°C = 5 (200 - 32/9)
°C = 93.3°C
Since the compound is still liquid at 93.3°C, we can say that the melting point and boiling point for this compound may be 60°C and 120°C
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