Hi how are you doing today

Consider the reaction in a commercial heat pack: 4 Fe (s) + 3 O2 (g) ® 2 Fe2O3 (s) DH = - 1652 kJ a) How much heat is released when 1.00 g iron is reacted with excess O2? b) What mass of O2 must react with iron in order to generate 2150 kJ of heat?

A water sample is found to contain 59 ppm zinc. If you drank 972 mL of this water, how many g of zinc would you ingest? Answer in units of g.

A filament at which temperature would have the most light absorbed by a piece of yellow glass?

What happens to valence electrons in metals?

Identify the process used to separate the components of natural gas

What is the purpose of a cell membrane

More polar solvents (eluents) move molecules more rapidly than less polar solvents. If you used a 1:1 hexanes:methanol mixture as solvent, would you expect the products to elute faster or slower?

C12 has 6 protons. how many neutrons does c13 have? a. 6 b. 7 c. 13 d. 19

Imagine you are at a local water park on a hot summer day and your feet begin to get hot from the cement. Looking ahead, you notice that there are two paths you can take to your favorite waterslide.

Determine the pH of a 0.350 M solution of HA. The pkb of A - is 12.830.