Chemistry II Check-in

What is a pure substance?

• A sample of matter with different chemical compositions

• A collection of different elements, molecules, or compounds

• A sample of matter with the same chemical composition throughout

• A combination of different substances that can be physically separated

Tags

NGSS.MS-PS1-4

Which of the following is a pure substance?

• Chicken Soup

• Oxygen

• Coffee

• Salad Dressing

What is a mixture?

• A combination of different substances that can be physically separated

• A combination of different substances that cannot be physically separated

• A collection of the same elements, molecules, or compounds

• A sample of matter with the same chemical composition throughout

Which of the following is a homogeneous mixture?

• Coffee

• Oxygen

• Chicken Soup

• Salad Dressing

Which of the following is a heterogeneous mixture?

• Oxygen

• Chicken Soup

• Coffee

• Salad Dressing

What can be used to physically separate a mixture by density?

• Magnet

• Distillation

• Filter

• Evaporation

Which of the following is a compound?

• Diamond

• Oxygen

• Tin

• Sugar

Which of the following is an element?

• Sugar

• Water

• Ozone

• Nitrogen

What is the chemical formula for ozone?

• O3

• N2

• O2

• H2

Tags

NGSS.MS-PS1-1

What is the chemical formula for the oxygen gas molecule?

• O

• O2

• N2

• H2

Tags

NGSS.MS-PS1-1