An element has a half-life of 30 years. if 1.0 mg of this element decays over a period of 90 years, how many mg of this element would remain?

When an atom of lithium loses and electron, the atom becomes a

Non motile in an sentences

What did johann wolfgang döbereiner contribute to the periodic table?

Would an insoluble liquid fuel with a specific gravity of 0.8 sink or float when water is added? Explain.

What is the species that determines the ph of a solution?

An ion has a charge of 2 - and 18 electrons. A) From which atom does this ion form? B) How do you know?

What diseases are spread in warm temperatures?

In 1993 the Minnesota Department of Health set a health risk limit for chloroform in groundwater of 60.0 g/L Suppose an analytical chemist receives a sample of groundwater with a measured volume of 79.0 mL.

A good way for someone to identify similar substances is to measure their densities true or false

At 25 ∘c, kp = 25 for the reaction h2 (g) + i2 (g) ⇌2hi (g). at equilibrium, the partial pressure of both h2 and i2 is 0.296 atm. what is the partial pressure of hi at equilibrium?