The most abundant trace gas in the atmosphere is neon hydrogen argon helium

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o

What is the difference between skimming and absorbing methods of the oil removal