CNG is made by compressing natural gas (which is mainly composed of methane, CH4), to less than 1 percent of the volume it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of 20â25 MPa (2,900â3,600 psi), usually in cylindrical or spherical shapes.
Definition of chromophore - an atom or group whose presence is responsible for the colour of a compound. Definition of chromophore - an atom or group whose presence is responsible for the colour of a compound.
Definition of CHLOROPLAST. : a plastid that contains chlorophyll and is the site of photosynthesis â see cell illustration. â chloÂ·roÂ·plasÂ·tic \ËkloÌr-É-Ëplas-tik\ adjective.