NGSS.MS-PS1-5

The law of conservation of mass states...

• Mass can be created and destroyed
• Mass can not be created nor destroyed
• something contains mass
• Nothing can be desttroyed

Tags

NGSS.MS-PS1-5

If the reactants on the left side of a chemical equation are C₃H₈ + 5O₂, the products in a balanced equation could be

• 4CO₂ + 3H₂O
• 3CO₂ + 4H₂O
• 2CO₂ + 3H₂O
• 3CO + 4H₂O

Tags

NGSS.MS-PS1-5

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Tags

NGSS.MS-PS1-5

What is the law of conservation of mass?

• The amount of matter changes when reacted or changed.
• The mass of all reactants are changed during a physical or chemical change
• The mass of the reactants equals the mass of the products
• The mass of the products is different than the mass of the reactants.

Tags

NGSS.MS-PS1-5

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

• 4Fe + 3O₂ -> 2Fe₂O₃
• 2 Fe + 3O₂ -> Fe₂O₆
• 4 Fe + O₆ -> 2Fe₂O₃
• None of the options are correctly balanced.

Tags

NGSS.MS-PS1-5

The fact that matter is not created or destroyed in any chemical or physical change is called the law of ___________________.

• conservation of nature

• conservation of matter

• conservation of trees

• conservation of tootsie pops

Tags

NGSS.MS-PS1-5

4 grams of hydrogen and 32 grams of oxygen will combine to form:

• 36 grams of water

• 28 grams of hydroxide

• 32 grams of oxygen

• 36 grams of deuterium

Tags

NGSS.MS-PS1-5

Chemical X has a mass of 20 grams, and chemical Y has a mass of 30 grams. If the two chemicals are mixed and a complete chemical reaction takes place, what is most likely the mass of the product?

• 20 grams

• 30 grams

• 50 grams

• 100 grams

Tags

NGSS.MS-PS1-5

True or False

In a chemical reaction, no new atoms are created, and no atoms are destroyed.

• TRUE

• FALSE

Tags

NGSS.MS-PS1-5

Identify if the following equation is unbalanced or balanced.

O₃+2C→3OC

• Unbalanced

• Balanced

Tags

NGSS.MS-PS1-5