Which technology is shown in the photograph? A. Negative controls
B. Biostimulation reaction
C. Gel electrophoresis
D. Polymerase chain reaction

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2

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?

Analyze the reaction to determine whether the reaction is exothermic or endothermic. explain your reasoning.