An unknown solid is placed on a scale and has a mass of 2.5 grams. The solid then displaces 35 mL of water in a graduated cylinder. Find the unknown solid's density.

• 0.071 g/mL

• 14 g/mL

• 37.5 g/mL

• 90 g/mL

Jenny blends together water, lemon juice, and sugar in a pitcher. She has mad a __________.

• compound

• pure substance

• homogenous mixture

• heterogenous mixture

Using the data table to the right, determine the identity of a cube of metal that measures 1.2 cm on each side and has a mass of 15.4 grams.

• Gold

• Silver

• Nickel

• Zinc

CO2, NaCl, and HCl may all be classified as

• elements

• compounds

• homogenous mixtures

• heterogeneous mixtures

Which of the following is not an example of a physical change?

• Cutting a piece of string in half.

• Crumpling a piece of paper into a ball

• Freezing water into an ice cube

• Letting the food in your lunch box rot in your locker

Milk, paint, and mayonnaise are all examples of _____.

• compounds

• elements

• mixtures

The law of conservation of mass states that matter _____ be created or destroyed, even after a chemical change.

• can

• cannot

Mixtures can be separated ______.

• chemically

• physically

Compounds can only be separated __________.

• chemically

• physically

__________ changes result in a new substance being formed.

• Physical

• Chemical