What is the identity of the unknown ink? use evidence to support your claim.

Which substances have the lowest melting points: ionic covalent, or metallic

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.