An atom has 91 protons and 145 neutrons. what is the isotope notation for this atom.

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

Helium decays to form lithium. which equation correctly describes this decay?

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?