Chemical weathering a. is caused by freezing and thawing b. breaks apart rocks by physical processes c. occurs when chemical reactions dissolve or change the minerals in rocks d. none of above

Identify the electromagnets with poles that are reversed from the electromagnet shown above

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.

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2