Chemistry Midterm

A mixture that is NOT evenly distributed is called ....

• Compounded
• Homogenous
• Heterogenous
• Salty

Are made from a combination of 2 or more elements in a constant ratio...

• Atoms

• Mixtures

• Compounds

• Elements

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

What units can be used to express density?

• g/mL
• grams
• millimeters
• milliliters

A bar of copper has a mass of 216 g and a volume of 24 cm³. What is the density of copper?

• 9 g/cm3

• .11 g/cm3

• 5184 g/cm3

• 322 mL

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Properties that can be observed without changing the identity of the substance.

• Physical
• Chemical

Example for chemical property

• color
• hardness
• toxicity
• solubility

Tags

NGSS.HS-PS1-1

Example for physical property

• melting point
• flammability
• reactivity 
• combustion

Tags

NGSS.MS-PS1-4

Example for chemical property

• malleability
• texture
• combustion
• sour taste