Which elements does it take to spell "nerds" using the chemical symbols on the periodic table of elements?
a.
nitrogen, einsteinium, radon, sulfur
b.
neon, rubidium, dysprosium
c.
nitrogen, erbium, darmstadtium
d.
nickel, einsteinium, ruthenium, silicon

For which one of the following reactions is the value of δh° rxn equal to δh° f for the product? a. 2 h2 (g) + o2 (g) → 2 h2o (l) b. n2 (g) + o2 (g) → 2 no (g) c. 2 h2 (g) + o2 (g) → 2 h2o (g) d. h2o (l) + 1/2 o2 (g) → h2o2 (l) e. none of the above

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate