Nung hh Cu(NO3)2 và AgNO3 trong bình có V = 14,56 lít (lúc đầu bình trống) đưa về 0°C thì Pbình . Khối lượng khí trong bình tan trong nước tạo ra 0,5 lít dd axit 1M. Tính m Cu(NO3)2 và m AgNO3.

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

An observation that requires measurement is called quantitative observable or qualitative