What volume of 0.12m ba(oh)2 is needed to neutralize 12.2 ml of 0.25m hcl? *
25 ml
13 ml
50ml
125 ml

2. how is heavy water different from normal water

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line