When heated, calcium carbonate goes through a chemical reaction, and produces calcium oxide (quick lime) powder and carbon dioxide gas. A chemist performed this reaction in a lab and found that the mass of the calcium oxide (quick lime) was less than the mass of the calcium carbonate. What is the reason behind this decrease in mass?

What shape would a molecule with two bound groups and two lone pairs have?

What is bromine+calcium iodide--> calcium bromide +iodine balanced

Match the vocabulary terms to their definitions. 1 . a long, chain-like set of molecules made up of repeating units joined end to end polymer 2 . a hard, brittle, heat- and corrosion-resistant material made by subjecting a nonmetallic mineral mixture to intense heat ceramic 3 . a plastic with low elongations that cannot be recycled thermoset 4 . a carbon fiber embedded in a polymer resin matrix thermoplastic 5 . a plastic with high elongations that can be recycled crystal 6 . a solid form resulting from the arrangement of atoms, ions, or molecules in definite geometric patterns composite