Surface mining for coal involves removing all the vegetation and rock above the coal being mined. Which two of Earth's subsystems are MOST immediately affected by surface mining?
O A. lithosphere and atmosphere
B. biosphere and hydrosphere
O C. lithosphere and biosphere
D. atmosphere and hydrosphere

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)

When hydrogen peroxide (h2o2) is added to potassium iodide (ki) solution, the hydrogen peroxide decomposes into water (h2o) and oxygen (o2). the chemical equation for the decomposition reaction is: 2h2o2—> 2h2o + o2. what is the role of the potassium iodide in this reaction? a. reactant. b. product. c. precipitate. d. catalyst.