A formula unit of an ionic compound Select one:
a. is an independent unit that can be isolated and studied.
O b. is the simplest ratio of ions that balances total charge.
O c. describes the crystal lattice.
O d. all of the above

please help

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe

8. what happens to matter during a chemical reaction

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.