Le sérum physiologique est principalement utilisé comme désinfectant. Il s'agit d'une solution aqueuse de chlorure de sodium (sel de cuisine). Les stocks étant pratiquement vide, un laboratoire fait appel à vous pour les aider à en fabriquer. Quelle est le solute et quelle est le solvant

Stage in which a typical star has completely stopped fusion

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium