Is thiamine mononitrate an ionic bond or covalent bond?

2. how is heavy water different from normal water

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents