What is the name of the physical change that occurs in each of the following instan a. Oxygen is cooled from -150°C to -200°C. b. Iron is cooled from 1600°C to 1500°C. C. Mercury is heated from -130°C to -100°C. 9. Which colorless substance is a solid at -50°C?

10. Which substance is a liquid at 1000°C?

11. Which substance condenses from a gas to a liquid as the temperature is cooled 20°C to -50°C?

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

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.

98 ! and brainliest plz ! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?