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1. it is noted that Pure ethanol (CH3CH2OH) has density 0.80625 g/cm³ at 0.0° C and density of 0.78945 g/cm ³ at 20.0 °C; calculate the difference in mass that is hold by a 500.0mL flask at a temperature of 0.0°C from that at temperature of 20.0 °C? (you can assume the volume of the sample at 0.0 °C temperature =volume of the sample at 20.0°C)

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