B2_Test Practice_

A student mixes 8 grams of chemical A with 6 grams of mixture B in a closed container. The chemicals react completely, and the products are formed.

According to the Law of Conservation of Mass, what should be the mass of the products formed?

• 2 grams

• 6 grams

• 8 grams

• 14 grams

Tags

NGSS.MS-PS1-5

Examine the diagram of the movement of a cart with four positions (W, X, Y, and Z) labeled, as shown. 

At which position(s) will the potential energy of the cart be equal to the kinetic energy?

• W only

• X only

• W and Y

• Y and Z

Tags

NGSS.MS-PS3-2

Two reactants, each having a mass of 50.0 g, react fully in a beaker. What is the total mass of the products in the reaction?

• 
  50 g

• 
  90 g

• 
  100 g

• 
  110 g

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Review the chemical reaction shown.

The reaction shows the reactants and products as well as some of their masses. Which number most accurately shows the mass (in grams) of oxygen (O₂) that is required for this reaction to occur?

• 12

• 36

• 42

• 54

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Synthetic Materials tend to be ___________________ than natural materials

• Less durable

• 
  More durable

• Just as durable

• None of the above

Tags

NGSS.MS-PS1-3

Which chemical equation is balanced to show that matter is conserved during the reaction?

• 
  CaCO₃ → CaCO₂ + CO₂

• 
  C + H₂O → CO + H₂

• N₂ + 3H₂ → 3NH₃

• 
  SO₂ + O₂ → 2SO₄

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The mass of chemical A is 2 g, and the mass of chemical B is 5 g. If the two chemicals are mixed and a chemical reaction takes place, what is the mass of the end products?

• 2 g

• 3 g

• 7 g

• 10 g

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

How is the Law of Conservation of Matter best represented in a chemical reaction?

• The mass of the products is greater than the mass of the reactants.

• The mass of the reactants is greater than the mass of the products.

• The mass of the reactants is equivalent to the mass of the products.

• The mass of the reactants has no relationship to the mass of the products.

Tags

NGSS.MS-PS1-5

Things, materials, substances, and components found in the natural environment are________.

• Synthetic resources

• 
  Artificial resources

• 
  Environmental resources

• 
  Natural resources

Tags

NGSS.MS-PS1-3

The diagram shows a ski jumper as he moves down the course.

At which point is the potential energy the greatest?

• J

• K

• M

• N

Tags

NGSS.MS-PS3-2