Respirator Recommendations. NIOSH/OSHA. Up to 100 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*. (APF = 50) Any chemical cartridge respirator with a full facepiece and cartridge(s) providing protection against the compound of concernÂ¿. (APF = 25) Any powered, air-purifying respirator with cartridge(s) providing protection against the compound of concern*Â¿.
A molecule is a particle containing two or more atoms. If it contains only one type of atom it is called an element. An exception to this is diatomic gases (for example: Oxygen, O 2, where the molecule contains two atoms of the same element, bonded covalently.
The second one is a balanced chemical equation. C6H12O6 ...means one molecule of glucose, but we are much too lazy to put a figure 1 in front of the glucose molecule. The C6 .means that the glucose molecule contains 6 atoms of Carbon. The H12 .means that the glucose molecule contains 12 atoms of Hydrogen.