Balancing Chemical Equations Test Review

Can matter be created or destroyed?

• Yes, it can be created.
• Yes, it can be destroyed.
• No, matter is always conserved
• None of these

Tags

NGSS.MS-PS1-5

The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.

• True
• False

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NGSS.MS-PS1-5

What is the law of conservation of mass?

• Matter changes when reacted or changed.
• The mass of all reactants are changed during a physical or chemical change
• The mass of the reactants is the same as the mass of the products
• The mass of the products is different than the mass of the reactants.

Tags

NGSS.MS-PS1-5

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

Evidence of a chemical reaction include:

• Phase change
• No new substance
• Bubbles forming
• Shape change

Tags

NGSS.MS-PS1-2

Evidence of a chemical change does NOT include:

• New substances
• Heat produced
• Phase change
• Light produced

Tags

NGSS.MS-PS1-2

If four hydrogen atoms react with two hydrogen atoms, how many atoms will be in the product?

• 6
• 4
• 8
• 2

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

The number of atoms of  N (nitrogen) in 3N₂O₅ is

• 5
• 2
• 6
• 15

Tags

NGSS.MS-PS1-1

The coefficient in  3H₂O is

• 6
• 2
• 3
• 5

Tags

NGSS.MS-PS1-1

In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 

• 4g
• 5g
• 9g
• 14g

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2