Question

Asked Oct 31, 2019

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What is the mass percent of ethanol (CHCHOH) if 0.0793 moles of ethanol is added to 0.264 kg of water?

Step 1

The mass percent of a component present in the mixture is given by equation (1), in which, m_{c} represents the mass of that component in the mixture and m_{t} represents the total mass of the mixture.

Equation (2) represents the formula for calculating the number of moles, in which, n represents the number of moles, m represents the mass and M represents the molar mass.

Step 2

The mass of ethanol can be calculated as,

Step 3

The mass of water is 0.264 kg which is equal to 264 g because 1 kg = 103 g.

The mass perce...

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