How many molecules are in 237g (about a cup of water)

In 2002, the rare earth elements mine in mountain pass, california was closed because

Which statement accurately represents the arrangement of electrons in bohr’s atomic model?

What is the typical rotational frequency frot for a molecule like n2 at room temperature (25∘c)? assume that d for this molecule is 1å=10−10m. take the total mass of an n2 molecule to be mn2=4.65×10−26kg. you will need to account for rotations around two axes (not just one) to find the correct frequency. express frot numerically in hertz, to three significant figures.