Which of the following is a homogeneous mixture

Among the elements of the main group, the first ionization energy increases a. from left to right across a period. b. from right to left across a period. c. when the atomic radius increases. d. down a group.

How many moles of each reactant are needed to produce 6.17 miles of HF (NH3) + F = (N2F4) + HF

How did the elements begin to stratify?

If you leave a solar powered flashlight in the sun for 8 hours, it will be able to stay lit for 3 hours. What would happen if you placed the flashlight under a bright light bulb for 8 hours?

Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Ca2+, V5+, Br-, S2-

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.