What is a substance?

A. A physical property of matter

B. A chemical property of matter

C. An element or compound that cannot be physically separated

D. characteristics used to tell the difference between mixtures

Which of the following is a monatomic cation Cs+ PO4- NH4+ Br

What structural units make up metallic solids

A sprinter set a high school record in track and field, running 200.0 m in 21.7 s. What is the average speed of the sprinter in kilometers per hour?

The amount of space that a gas takes up is its a. volume. b. mass. c. pressure. d. density.

What mass, in grams, of chlorine gas (Cl2) is contained in a 12.5-liter tank at 27.0 degrees Celsius and 2.85 atmospheres? Show all of the work used to solve this problem.

Which of the following lists the types of single substances? (Select only one answer) Group of answer choices elements and mixtures suspensions, solutions, and colloids elements, compounds, and mixtures elements and compounds

What is the average mass of a single silicon atom in grams?

Why is it wrong to assume that you are only "doing science" while you are doing experiments?

An ice cube is placed on a kitchen counter. Which best describes heat flow in this situation

When water is placed in a thin glass tube, it tends to climb up the walls of the tube. This effect is known as capillary action. What causes this capillary action? A. metallic bonding B. covalent bonding C. ionic bonding D. hydrogen bonding