¿Cuál de las siguientes ecuaciones presenta la mayor suma de coeficientes?
I. H 2 + Br 2  HBr
II. Al + O 2  Al 2 O 3
III. NH 4 NO 3  N 2 O + H 2 O
IV. H 3 BO 3 + HF  HBF 4 + H 2 O
V. S 8 + O 2  SO 3

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth

Organisms are classified as producer or consumers according to the way they ?