To identify a liquid substance, a student determined its densityUsing a graduated cylinder, she measured out a 45 sample of the substance. She then measured the mass of the sample, finding that it weighed 38.5 g. She knew that the sub stance had to be either isopropyl alcohol (density 0.785g / m * L ) or toluene (density 0.866g/mL) . What are the calculated den sity and the probable identity of the substance?

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

When a scientific theory has been tested and proved by the scientific community, it becomes a law