6. A student investigates the properties of an unknown liquid substance in a beaker. The student finds the substance has a mass of 56.2 g and a volume of 42.3 mL. The
liquid has a yellow, translucent appearance. The liquid has a freezing point of 13°C
and a boiling point of 105°C. When the liquid boils, a white powder residue is left in
the beaker.
What conclusion can the student make based on the evidence collected?

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.

What happens when an acid dissolves?

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.