A student measures the mass of 8cm block of brown sugar to be 12.9g what is the density of the brown sugar

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.