What is the number of moles of 500 liters of he gas at stp?
a) 0.2 mol
b) 90 mol
c) 0.05 mol
d) 22 mol

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse

Witch two conditions can limit the usefulness of the kinetic molecular theory in describing gas behavior?