The pH of a solution is 8. Some hydrochloric acid is added to the solution. Suggest the pH of the solution after mixing. pH=??

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?