Calculate the molarity and normality of the following: (a) 80 µg L-¹ HNO3 (b) 135 µg L-¹ CaCO3 . (c) 10 (d) 10 µg L-¹ Cr(OH)3 1000 µg L-¹ Ca(OH)2 .

All infectious waste containers should be.... A. Label on at least one side with biohazard symbolB. Be leak proofC. Should not be made of cardboardD. Should not be hung on a metal type rack offering no secondary containmentE. Never be left left on the floor outside of a secondary leak-proof containerF. All of the above

The particulate model of matter can be used to explain evaporation ( liquid to gas below the boiling point) by:  a.) stating that particles in liquid phase have range of KE and the highest KE can escape b.) stating that particles in liquid phase have range of PE and the lowest PE can escape c.) stating that particles in liquid phase have range of PE and the highest PE can escape d.) stating that particles in liquid phase have range of KE and the lowest KE can escape

The answer is supposed to be C though, it was a provincial question in the Chem 12 august 2005 exam. Why is it C?