Explain how recrystallization relates to the cycling of Earth’s materials and the flow of energy that drives it.

Calculate the number of moles of ethane in 100 grams

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull