In the titration the student used 25.0 cm of sodium hydroxide. This volume reacted with exactly 20.0 cm' of 0.1 mol/dm of sulfuric acid solution.

The equation for the reaction is:
2NaOH + H2SO4 → Na2SO4 + 2H20||
What is the concentration in mol/dm' of the sodium hydroxide solution?

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist