How many grams of dry NH4Cl need to be added to 2.30 L of a 0.300 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 9.00? (The Kb for ammonia is 1.8×10−5)

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.

How much energy is made when a pice of wood burns. how do you know

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?