Validation testing is done on new balances (accuracy, linearity, etc.) as well as a spectrophotometer. these tests are covered by astm standard test methods. for these three instruments (a balance either an analytical or a top loader), a visible /ultraviolet spectrophotometer, and a ph meter and associated calibrating buffers for each of the three instruments, find an astm method for conducting the test. state the title of each of the test methods and the astm reference number

Who determined the nature of chemical bonds?

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

If you are told to get 100 ml of stock solution to use to prepare smaller size sample for an experiment, which piece of glassware would you use?