What effect on the boiling point is produced by: (a) a soluble non-volatile impurity, such as table salt- (b) an insoluble foreign substance, such as sand?

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

How are isotopes of the same chemical element alike? how are they different?

What does the mass of 0.7891 mol of ferric oxide (fe2o3)