Does water behave as an acid or a base when it reacts with deprotonated methylamine?

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

0.09 moles of sodium sulfate in 12 ml of solution

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.