Which procedure could a st[ident use to examine an intensive property of a rectangular block of wood?

Why is the melting of ice a physical change ?

What three things does a balanced equation show you?

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.