Mei-ling is given the task of studying the compound calcium bromide. before she even begins her research, what information can mei-ling obtain from the compound's chemical name alone? select all that apply. she can tell the compound has at least one negatively charged calcium atom and one positively charged bromine atom. she can tell the compound has at least one positively charged calcium atom and one negatively charged bromine atom. she can tell that the compound forms molecules. she can tell that the compound forms networks

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