Boron 10 accounts for 20% of naturally occurring boron at 10.0129 AMU. The other isotope has a mass of 11.00931 AMU. What is the mass of natural boron?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

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

How many formula units in 2.63 mols of nacl?