A gas with a volume of 4.2L at 0.610atm is allowed to expand until the pressure drops to 0.25atm. What will be the new volume?

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Based on its chemical properties, identify the position of each chemical family on the periodic table.