Recalling the effect of mixing a strong acid with a strong base and wise-versa, predict the direction of the following: (a) hno2(aq) + cn- (aq) = hcn(aq) + no2 (aq) (2 marks) (b) hf(aq) + nh3(aq) = f (aq) + nh4+ (aq) (2 marks)
(c) explain the reasoning behind your answers above (1 mark)

Put these processes of the water cycle in the correct order, starting at the point where the water is in the lake: 1. water evaporates into the atmosphere 2. rain, snow, or other precipitation falls 3. water collects into larger bodies of water 4. water vapor condenses into liquid water

What is the number of moles in 15.0 g ash3?

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b. slope c. benchmark d. index contour