Mark is studying the effect of carbon emissions from his car on air quality. He does this by putting his car in a closed air environment and letting it run for specified amounts of time. From a remote distance (where he is safe), Mark measures the carbon dioxide, carbon monoxide, and methane levels in the air. From here, Mark will recreate the conditions caused by his car on a smaller scale in his lab, to determine the possible molarity of the acid rain as a result.

The graph shows the solubility of several different salts in water, across a range of temperatures. according to the graph, which salt can dissolve at a concentration of about 60 g/100 cm3 of water at 40 degrees celsius?

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Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.