What is the hydronium ion concentration and the ph for an aqueous solution of nh3 that has a hydroxide ion concentration of 2. 25 × 10-2 mol l-1?.

Find the area of shaded region z=-0.89

If inflation is 6% and nominal gdp grew by 4%, then during the same period real gdp changed by a) -2% b) 2% c) 4% d) 5%

Which of the following characteristics of the arctic rabbit is specifically an adaptation to living in the tundra? a. small size b. keen eyesight c. strong legs d. white fur