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

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-5

When CaCO₃ is heated, it forms CaO and CO₂. Which of these statements best describes the mass of the products if 100 g of CaCO₃ is heated?

• The difference in the products’ masses is equal to the mass of the CaCO₃
• The sum of the products’ masses is less than the mass of the CaCO₃
• The mass of each product is equal to the mass of the CaCO₃
• The sum of the products’ masses equals the mass of the CaCO₃

Tags

NGSS.MS-PS1-5

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-5

Is this equation balanced?

• Yes

• No

Tags

NGSS.MS-PS1-5

Matter cannot be created or ________.

• destroyed
• moved
• seen
• eaten

Tags

NGSS.MS-PS1-5

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

• 1
• 2
• 3
• 0

Tags

NGSS.MS-PS1-5

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Tags

NGSS.MS-PS1-5

The mass of the products in a chemical reaction is the same as the mass of the reactants in the reaction. Which law best describes this statement?

• The Law of Conservation of Angular Momentum

• The Law of Superposition

• The Law of Conservation of Matter

• The Law of Entropy

Tags

NGSS.MS-PS1-5

Which of the following equations are correctly balanced?

• 12CO₂ + H₂O ---> C₆H₁₂O₆ + O₂

• CO₂ + H₂O ---> 3C₆H₁₂O₆ + O₂

• CO₂ + 9H₂O ---> C₆H₁₂O₆ + O₂

• 6CO₂ + 6H₂O ---> C₆H₁₂O₆ + 6O₂

Tags

NGSS.MS-PS1-5