Chemistry Chapter 2

Elements have been named for which of the following?

• places

• colors

• heavenly bodies

• all of these

How many atoms are in glucose Na₂CO₃?

• 5

• 6

• 7

• 8

Oxygen (O_{2) is a ____________}

• mixture

• polyatomic element

• monatomic element

• diatomic element

A homogeneous mixture is also called a

• solution

• pure substance

• compound

• element

The first law of thermodynamics is called the law of

• entropy

• cause and effect

• thermal energy

• conservation of energy

The amount of matter packed into a given volume determines its

• color

• density

• ductility

• mass

Scientists classify matter on the basis of its physical and _____ properties.

• pure

• compound

• chemical

• collective

A substance can experience a change of state as ____ energy is added to or removed from it.

• potential

• kinetic

• thermal

• chemical

Water evaporates at 100 °C

• physical change

• chemical change

• ductility

• potential change

In the chemical formula 4H₂O, the number 4 is a

• superscript

• multiplier

• subscript

• coefficient