A closed, rigid tank contains a two-phase liquid-vapor mixture of Refrigerant-22 initially at −18°C with a quality of 50.9%. Energy transfer by heat into the tank occurs until the refrigerant has become purely a saturated vapor. What is the final temperature, in [°C]? (2°C) What is the net amount of heat per unit mass of refrigerant to/from the tank, in [kJ/kg]? (103 kJ/kg)

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.

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.