Astudent took 100 ml of a solution of mg(oh)2 and reacted it with h2so4 (aq) to calculate the concentration of hydroxide ions in the solution. if 13.75 ml of 0.010 m h2so4 was used to react with all of the oh- (aq) in the 100-ml solution, what was the concentration of hydroxide ions dissolved in the 100-ml solution

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.