Chemistry Junior

Dry ice is solid carbon dioxide, or CO2. Dry ice may be used as a cooling agent and contains two oxygen atoms bonded to a carbon atom. Dry ice is a ___________________ .

• pure substance

• mixture

Tags

NGSS.MS-PS1-1

Instant coffee is made by dissolving a powder in hot water. Instant coffee is a ___________________ .

• pure substance

• mixture

Baking soda is the common name for sodium bicarbonate, or NaHCO3. It can be produced through chemical reactions involving carbon dioxide and sodium hydroxide.

• pure substance

• mixture

Cake batter is a substance that may contain flour, eggs and sugars mixed by hand or with an electric mixer. Cake batter is a ___________________ .

• pure substance

• mixture

Chalk is a mineral found in rocks. It contains carbon, oxygen and calcium atoms. Chalk is a ___________________ .

• element

• compound

Tags

NGSS.MS-PS1-1

Nickel has the chemical symbol Ni and atomic number 28. It is a silvery-white metal and cannot be broken down physically or chemically into a more simple substance. Nickel is a ___________________ .

• element

• compound

Ammonia is a colorless gas with the formula NH3. Ammonia contains hydrogen and nitrogen and cannot be broken down physically. Ammonia is a ___________________ .

• element

• compound

Tags

NGSS.MS-PS1-1

Mixtures that have the same composition throughout are...

• heterogeneous

• homogeneous

• elements

• pure substances

Granite is an igneous rock that contains the minerals quartz, feldspar, mica and others. The exact composition will vary from sample to sample. Granite is a(n) _______ .

• element

• compound

• heterogeneous mixture

• homogenous mixture/solution

Kool aid is a solution containing kool aid powder dissolved in water. Which is the solute in this homogeneous mixture?

• kool aid powder

• water