What is the oxygen-to-hydrogen mass ratio for h2o2?.

Alarge marble is dropped in a graduated cylinder with 35ml of water in it. the water level increases to 49ml. what is the volume of the marble

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Free answer. the treaty of versailles ended world war i, but some of the terms of the treaty contributed to the beginning of world war ii. which was one of the terms of the treaty? the answer would be "germany was forces to pay reparations to the allied countries.". i hope this .