The mole fraction of nitrous oxide in dry air near sea level is 1.818 × 10-5, where the molar mass of nitrous oxide is 44.013. The concentration of nitrous oxide in the atmosphere is ppm. 2.0 × 1012
18.18
5.0 × 10-5
5.0 × 102
5.5 × 10-13

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town

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.

In which region is the substance in both the solid phase and the liquid phase? 1 2. 3 4 mark this and return save and exit next