You know that an unlabeled water bottle contains at least some water. you measure the freezing point of the unknown substance and find that it freezes at a temperature lower than 0 degrees celsius at 1 atmosphere pressure. which of the following can you conclude?

the substance is pure water.

the substance will have a boiling point that is less than 100 degrees celsius.

the substance will have a vapor pressure that is greater than that of pure water.

the substance is an aqueous solution.

Can anyone explain 1. review your spectrometry data and use the known elements to identify the star's composition. which unknown elements make up this star? justify your element selections. 2. in parts i and ii of the lab, what happened to the electrons of each element to produce the different colors of light? explain your answers using important terms from the lesson and information provided in the laboratory. 3. stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. based on your data, is the newly discovered star a younger star? explain your answer.