Podríamos vivir sin la quimica

urgente

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

Modern weaponry has increased the number of deaths in wars and violent conflicts.

How many moles of na2s2o3 are needed to react with 0.12mol of cl2? show work.