Help! Please:( Given the following chemical equation, how many grams of water are created when 50.0 grams of oxygen react with excess hydrogen ?
2H2 + O2 - -> 2H20

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

Find the mass in grams of 1.37x1020 particles of h3po4

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.