Chemistry Exam Review

The volume of a sponge is 125.4 cm₃ and the density was 0.08g/cm₃ what is its mass?

• 1567 grams

• 10.03 grams

• 125.4 grams

• 30.09 grams

Which one is not a property

• Mass

• Density

• Melting Point

• Solubility

Which change will produce a new substance

• making coffee

• making cookies

• making boiling water for tea

• making snowflakes from paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Predict the products: C₂H₆ + O₂ --> ?

• H₂O + O₂

• CO₂ + H₂O

• C + O₂

• CO₂ + H₂O₂

• CH + O₂

Tags

NGSS.MS-PS1-2

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

• 1

• 2

• 3

• 0

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the mass number of bromine?

• 35

• 45

• 80

• 79.904

The atomic number of Re is 75. The atomic mass of one of its isotopes is 186. How many neutrons are in an atom of this isotope?

• 186

• 75

• 261

• 111

Which one of these is a chemical property?

• melting point

• boiling point

• color

• flammability

Tags

NGSS.MS-PS1-5

How many valence electrons does Carbon have?

• 1

• 2

• 3

• 4

How many valence electrons does Lithium (Li) have?

• 8

• 1

• 5

• 2