the empirical formula of a compound is CH, at 200 Celsius, 0.145g of this compound occupies 97.2mL at a pressure of 0.74 atm. what is the molecular formula of the compound?
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CH = 13.0187 g/mol
PV = nRT
n = PV / RT = (0.74 atm) x (0.0972 L) / ((0.08205746 L atm /K mol) x (200 + 273)) =
0.001853185 mol
(0.145 g) / (0.001853185 mol) / (13.0187 g/mol) = 6.010
Round to the nearest whole number and multiply by the empirical formula:
C6H6 is the molecular formula
PV = nRT
n = PV / RT = (0.74 atm) x (0.0972 L) / ((0.08205746 L atm /K mol) x (200 + 273)) =
0.001853185 mol
(0.145 g) / (0.001853185 mol) / (13.0187 g/mol) = 6.010
Round to the nearest whole number and multiply by the empirical formula:
C6H6 is the molecular formula