At 1285oC the equilibrium constant for the reaction Br2(g) ⇌ 2Br(g) is Kc =0.104. A 0.200 L vessel containing an equilibrium mixture of the gases has 0.29 g Br2 (g) in it. What is the mass of Br(g) in grams in the vessel? Molar mass of Br = 80 g/mol. Keep 3 digits after decimal point.

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness