Why is it important to have a controlled experiment

The element sulfur is classified as a 1. metal 2. metalliod 3. nonmetal 4. noble gas

What happens to acetone molecules when you add heat to a beaker of liquid acetone?

What are 2 factors that should be considered when planning to use solar power?

Which statement best describes the lattice structure of solid sodium chloride? A. Each sodium ion is surrounded by one chloride ion. B. Each chloride ion is surrounded by two sodium ions. C. Each chloride ion is surrounded by four sodium ions. D.

Samantha & Ryan are investigating an unknown substance. They make the following observations about the substance: 1. it is black 2. it has a dull luster 3. it weighs 6.50 g 4. it is solid 5. it is roughly 2 inches long 6.

What distance is travled by a police car that moves at a constant speed of 1.5 km/min for 5.0 min?

You have 3 L of a 5M solution of calcium chloride. How many L would you be able to make of a 0.5M solution?

Is the knowledge and tools that people use to manipulate their environment. a. Ethnocentrism c. Diffusion b. Technology d. Reformulation

Suppose that a solution is tested for NO2 ion by adding 3M H2SO4 and heating, repeating this process until no further reaction occurs.

Is pepperoni pizza an element?