What mass of iron (II) sulfate is found in 75mL of 5%w/V solution?

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.

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

What volume of argon gas is equal to 1.60 grams of argon