How many moles of oxygen are present in 33.6l of the gas at 1atm and 0c

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

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.