sodium chloride is called an electrovalent compound where as carbon dioxide is called covalent compound why

What is the mass of 4 molecules of co2

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

What best discribes the relationship between wavelength and frequency in a electromagnetic wave