Will an acidic solution have a high or low ph at 25 degrees celsius? what is the ph range that is considered acidic at 25 degrees celsius.

What does x represent in the formula for the compound xcl4?

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?