How many km are in 1.29 x 10 ^-2 cm?

can someone pls help me

How much heat is released upon converting one mole of steam (18.0 g) from 100.0 ∘c to water at 25.0 ∘c? show work and constants, trying to figure out how it works. only given the heat capacity for steam and water so try to only use that

Iam in desperate need of with this !

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