What can scientists measure to provide evidence that electrons can move from one energy level to another?

If the pressure of the gas in a 2.31 L balloon is 0.12 ATM and the volume increases to 7.14 L what will be the final pressure of the air within the balloon? Assume the temperature remains constant

If there are only a few remaining members of an insect species living in one area, which would most likely cause this species to become extinct? the introduction of new predators to the insects' environment

Why some earthquake and volcano data do not fit the patterns you observed?

What are crystalline solids? A. Solids with heterogeneous organization B. Solids with a repeating atomic pattern O C. Solids with a random atomic structure D. Solids that break apart in jagged pieces

Is lead a mixture or pure substance? and is Paint a mixture or pure substance?

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.