Given the following chemical reaction: 2 o2 + ch4 --> co2 + 2 h2o
what mass of oxygen is required to completely react with 2 moles of ch4?
a)77 grams o2
b) 98 grams o2
c) 128 grams o2
d) 144 grams o2

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?

In the reaction h2co3 (aq) + 3nh3 (aq) = 2 nh4+ (aq) + co3 2-, how many electrons are transferred?

Match the term to its description match term definition chemical energy a) internal energy caused by vibrations of atoms and molecules electrical energy b) electromagnetic energy that travels in waves radiant energy c) the movement of an electrical charge thermal energy d) potential energy stored in the bonds between atoms