Question 26

The mass of ethyl alcohol that exactly fills a 200.0 mL container is 157.8 g.

To determine the mass of ethyl alcohol that fills a 200.0 mL container, we can use the density of ethyl alcohol, which is approximately 0.789 g/mL. Multiplying the volume (200.0 mL) by the density gives us a mass of 157.8 g.

A) 157.8 g

This option is correct as it corresponds to the calculation of mass using the density of ethyl alcohol. The mass is calculated by multiplying the volume (200.0 mL) by the density (0.789 g/mL), resulting in 157.8 g.

B) 253.49 g

This option is incorrect because it does not correspond to the mass calculated from the volume and density of ethyl alcohol. If one were to use the density incorrectly or miscalculate, they might arrive at a value like 253.49 g, but this does not reflect the correct relationship.

C) 0.0039 g

This option is incorrect as it is far too low for the mass of ethyl alcohol in a 200.0 mL container. The value indicates a misunderstanding of the scale of the mass involved, as it is significantly less than what would be expected given the volume.

D) None of the above

This option is incorrect because option A provides the correct mass of ethyl alcohol for the given volume. Therefore, "None of the above" does not apply, since there is a correct answer provided.

Conclusion

The correct answer is definitively A) 157.8 g, as it accurately reflects the mass of ethyl alcohol when calculated from its density and the specified volume. Options B and C fail to align with the appropriate calculations, while D is incorrect because there is a valid answer available. Thus, A is the only option that accurately represents the mass of ethyl alcohol in the context provided.