З BaCl2 how many atoms

What are mols and how are they calculated

How many electrons does oxygen need to complete its octet? a) 1 b) 2 c) 3 d) 4 e) 6

What is the pH of a buffer solution that is 0.59 M pyridine and 0.30 M pyridinium bromide? (Assume the value of Kw is 1.0 10-14.)

Which has a higher kinetic energy an object at 20° C or an object at 50°C

Which of the following would contain 48 electrons?

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.