Chemistry Final Exam Review 2020-2021

What are the two REACTANTS in a combustion reactions?

• hydrocarbon and carbon dioxide

• hydrocarbon and oxygen

• carbon dioxide and water

• oxygen and carbon dioxide

Which of these is a chemical property?

• The density of water is 1 g/mL

• Water's freezing point is 0 degrees Celsius.

• Calcium will react with water..

• Water is a gas at 105 degrees Celsius.

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

• crumpling paper

• sharpening a pencil

• ice melting

• a nail rusting

Tags

NGSS.MS-PS1-2

Convert this number into scientific notation: 0.068

• 6.9 x 10⁶

• 6.8 x 10^-9

• 6.8 x 10^-2

• None of the above

Calculate the molar mass of Cu₂O.

• 37 g/mol

• 45 g/mol

• 79.5 g/mol

• 143 g/mol

Determine the mass of 4.20 moles of C₆H₁₂

• 353 g

• 0.0499 g

• 337 g

• 2.53 x 10²⁴ g

How many grams are in 1.2 x 10²⁴ molecules of CO?

• 28 grams

• 56 grams

• 6.0 grams

• 1.2 grams

Sulfur dioxide, SO₂, is what kind of compound?

• ionic compound

• molecular compound

• metallic element

• non-metallic element

What is the name of CCl₄?

• carbon tetrachloride

• monocarbon tetrachloride

• tetracarbon monochloride

• carbon chloride

What is the correct formula for sodium oxide?

• NaO

• NaO₂

• Na₂O

• Na₂O₂