Which of the following values best classifies a bond between 2 atoms as being covalent?
A. An electronegativity difference of greater than 2.7 between the
atoms
B. An electronegativity difference of less than 1.7 between the atoms
C. An electronegativity difference of less than 2.7 between the atoms
D. An electronegativity difference of greater than 1.7 between the
atoms

The three types is stress that act on earths rocks are compression, tension, and

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction