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A chemist made five mixtures of two waxes, Wax P and Wax Q, each with a different percent of Wax Q by mass. For each mixture, the chemist recorded its melting point, the temperature at which the solid mixture fully melted, and the density of the solid mixture at 20 °C. Table 1 shows the results. Table 1 \begin{array}{c|c|c}\text{\% Wax Q}&\text{Melts at (°C)}&\text{Density (g/mL)}\\ \hline 0&64&0.90\\ 25&55&0.91\\ 50&48&0.92\\ 75&52&0.93\\ 100&58&0.94\end{array} According to Table 1, as the percent of Wax Q in the mixture increased, the melting point of the mixture:

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A chemist made five mixtures of two waxes, Wax P and Wax Q, each with a different percent of Wax Q by mass. For each mixture, the chemist recorded its melting point, the temperature at which the solid mixture fully melted, and the density of the solid mixture at 20 °C. Table 1 shows the results. Table 1 $$ According to Table 1, as the percent of Wax Q in the mixture increased, the melting point of the mixture:

Aincreased onlyBdecreased onlyCincreased and then decreasedDdecreased and then increased

Where A comes from

The density rises in every row, from 0 to 100 percent of Wax Q.

Where B comes from

From 0 to 50 percent of Wax Q, the melting point falls: 64, 55, then 48 °C.

Where C comes from

This puts a peak in the middle: a melting point higher than at either end.

Solution

Syllabus

Interpretation of Data

Reading Data

Trends and Relationships

Interpolation and Extrapolation

Comparing and Combining Data

Scientific Investigation

Experimental Design

Methods and Tools

Changing and Extending Experiments

Evaluating Arguments and Models

Hypotheses and Conclusions

Comparing Viewpoints

Models and New Evidence

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