The atmospheric concentration of CO2 gas is presently 375 ppm (parts per million, by volume; that is, 375 L of every 106L of the atmosphere are CO2). What is the mole fraction of CO2 in the atmosphere?

Acovalent bond is formed between the two hydrogen bonds

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.