Acompound has an empirical formula of ch2o. an independent analysis gave a value of 150.13 g for its molar mass. what is the molecular formula of the compound?

Compare and contrast physical changes with chemical changes.

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.

Displacement is the slope of a velocity vs. time graph a. true b. false