Electrolysis uses electrical current to break water molecules into oxygen gas and hydrogen gas. How do you know that this is a chemical change?

Scientists have established that some of the layers of Earth are solid, some are liquid, and some are semi-fluid. Explain how the scientists are able to determine the liquid and solid layers.

True or False Ionic Attractions cause waters low vapor pressure.

Many scientists say, "There is no such thing as a closed system in the universe." For example, even an unopened can of soda is an open system. example explains why an unopened can of soda is an open system? A.

The nucleus of a helium atom is identical to: a gamma particle, an alpha particle, a beta particle, or all of the above

A alkaline earth metal is an element is groups 3-12 of the periodic table true or false?

What types of matter could be separated by physical methods?

What information does a net ionic equation give that a complete ionic equation does not show

What is the molality of a solution containing 4.0 moles of solute in 3.2 kg of solvent? Round to the nearest tenth. Don't forget the units.

What is the name of a binary compound made up of lithium and chlorine?

A scientist in London and a scientist in California both conducted independent investigations that produced similar results.