Does anyone know about "van der waals forces" i know it's "intermolecular forces of attraction" and they hold molecules together, especially large ones and it's not as strong of a bond as covalent and ionic bonds. i need an example of an animal that uses it other than a gecko.

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.

What must be done to breed dogs for a partical trait