If a chemical reaction such as the formation of our own oxide contains for Adams of iron(Fe) in the product how many items of iron would be the reactants? a. 12 atoms of iron
b. 8
c. 4
d. 2

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes