What is the molarity of a solution containing 78.6 g of mgcl2 dissolved in 1.00 l of solution?

The isotonic saline solution described in part a is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops. based on this information, what can be said about these two solutions?

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

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