Question

a student heats up solid X. it starts to melt at 35°c, and finishes melting at 40°C. what does this tell you about solid X.
a. solid X is a pure compound
b. solid X is a pure element
c. solid X is an impure substance
d. solid X is an impure compound​

Answer 1

The answer to the question what does this tell you about solid X is C. solid X is an impure substance

Since solid X starts to melt at 35°c, and finishes melting at 40°C, it shows that it melts at a range of temperatures.

This shows that solid X is an impure substance since it melts at a range of temperatures.

Note that impure substances are a combination of two or more pure substances not chemically combined together.

And, matter is classified into pure and impure substances.

Pure substances are classified into elements and compounds, while impure substances are classified into homogenous and heterogeneous substances.

Since solid X melts at a range of temperatures, solid X is an impure substance since pure substances melt at specific temperature.

So, the answer to the question what does this tell you about solid X is C. solid X is an impure substance

Learn more about impure substances here:

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