I WILL MARK BRAINLIEST ANSWER! Which statement describes heterogeneous mixtures?

1. They are made up of two or more Pure substances that are not chemically bonded together and appear non-uniform

2. The substances they are composed of can only be separated chemically

3. The substances they are composed of have fixed ratio between their components

4. They are made up of two or more pure substances that are chemically bonded together appear uniform

Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration. what is the titrant volume? titrant analyte indicator titrant volume analyte concentration naoh ch3cooh phenophthalein select one: a. 20.0 ml b. 27.0 ml c. 30.0 ml d. 24.0 ml

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.

In a copper wire, a temperature increase is the result of which of the following