Questions: A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of carbon tetrachloride, ethanolamine, tetrahydrofuran, dimethyl sulfoxide, and diethylamine. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: carbon tetrachloride 1.6 g/cm^3 ethanolamine 1.0 g/cm^3 tetrahydrofuran 0.89 g/cm^3 dimethyl sulfoxide 1.1 g/cm^3 diethylamine 0.71 g/cm^3 Next, the chemist measures the volume of the unknown liquid as 1.064 L and the mass of the unknown liquid as 751 g. Calculate the density of the liquid. Round your answer to 3 significant digits. Given the data above, is it possible to identify the liquid? If it is possible to identify the liquid, do so.

A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of carbon tetrachloride, ethanolamine, tetrahydrofuran, dimethyl sulfoxide, and diethylamine. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: carbon tetrachloride 1.6 g/cm^3 ethanolamine 1.0 g/cm^3 tetrahydrofuran 0.89 g/cm^3 dimethyl sulfoxide 1.1 g/cm^3 diethylamine 0.71 g/cm^3 Next, the chemist measures the volume of the unknown liquid as 1.064 L and the mass of the unknown liquid as 751 g. Calculate the density of the liquid. Round your answer to 3 significant digits. Given the data above, is it possible to identify the liquid? If it is possible to identify the liquid, do so.
Transcript text: A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of carbon tetrachloride, ethanolamine, tetrahydrofuran, dimethyl sulfoxide, and diethylamine. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: carbon tetrachloride & $1.6 \mathrm{~g} \cdot \mathrm{~cm}^{-3}$ ethanolamine & $1.0 \mathrm{~g} \cdot \mathrm{~cm}^{-3}$ tetrahydrofuran & $0.89 \mathrm{~g} \cdot \mathrm{~cm}^{-3}$ dimethyl sulfoxide & $1.1 \mathrm{~g} \cdot \mathrm{~cm}^{-3}$ diethylamine & $0.71 \mathrm{~g} \cdot \mathrm{~cm}^{-3}$ Next, the chemist measures the volume of the unknown liquid as 1.064 L and the mass of the unknown liquid as $751 . \mathrm{g}$. Calculate the density of the liquid. Round your answer to 3 significant digits. Given the data above, is it possible to identify the liquid? If it is possible to identify the liquid, do so.
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Solution

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Solution Steps

Step 1: Calculate the Density of the Unknown Liquid

To calculate the density of the unknown liquid, we use the formula: $$\text{Density} = \frac{\text{Mass}}{\text{Volume}}$$ Given that the mass of the unknown liquid is 751 g and the volume is 1064 cm^3, the calculated density is 0.706 g/cm^3 after rounding to 3 decimal places.

Step 2: Compare the Calculated Density with Known Densities

We compare the calculated density with the known densities of possible liquids. The calculated density closely matches the density of diethylamine, with a difference of 0.004 g/cm^3.

Final Answer:

The unknown liquid is likely diethylamine, based on its density.

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