Birds and humans are theorized to have a common ancestor because they have homologous structures. Which evidence best supports this theory?

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

You have a sample of a gas that occupies a volume of 17ml at -111 degrees celsius. what volume does the sample occupy at 88 degrees celsius? show all work asap

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form