In the formula for the compound xcl4, the x could represent
(1) c (3) mg
(2) η (4) zn

The most efficient way to establish the best possible economizer position is to measure

How can a mixture of salt water be separated into salt and water

Technician a says that you should never jump-start a frozen battery. technician b says that a frozen battery can explode, causing injury, when jump-started. who is correct?