Calculate the number of atoms of argon in 75.0 L of argon at STP.

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.

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?