Review for Chem Test Pt. 2

If reaction starts with 20g of reactants it should produce 

• a total of 40g of products
• a total of 10g of products
• a total of 80 g of products
• a total of 20g of products

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?

• They both will weigh the same
• The product always weighs more than the reactant
• The reactant will weigh more than the product
• They both will loose mass after the reaction

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Mass, relative density, solubility, color, texture, state of matter, conductivity, etc.

• Physical state
• Insulators
• Physical Properties 
• Inferences

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which is a chemical property of matter?

• Reactivity

• Color

• Density

• Solubility

A substance has a pH of 4. This should be classified as ___.

• an acid

• a base

• a reactive matter

• an inorganic compound

Which is NOT an example of a chemical property?

• Water is a liquid at room temperature.

• Vinegar bubbles when baking soda is added.

• Wood burns when exposed to fire.

• Apple slices turn brown.

Tags

NGSS.MS-PS1-2

Which pH number indicates a neutral solution?

• 0

• 5

• 7

• 10

A substance with a pH less than 7 is ___.

• an acid

• a detergent

• neutral

• a base

An unknown substance feels slippery, tastes bitter, and has a pH of 8.5. This substance is ___.

• a base

• an acid

• a salt

• a neutral substance