Please help me with thiss ill mark you brainlist

Which position represents spring in the southern hemisphere? a) b) c) d)

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released