Chemical Reactions Review

If the atoms of an object are moving slow, the object's temperature would feel...

• Cold
• Hot
• Unknown

If the atoms of an object are moving fast, the temperature of the object would be...

• High
• Low
• Unknown

Select the correct vocabulary term: Anything that has mass & takes up space.

• gravity
• force
• matter
• volume

Select the correct vocabulary term: Substances that form as the result of a chemical reaction.

• products
• reactants
• coefficients
• subscripts

Select the correct vocabulary term: Substances present at the start of a chemical reaction.

• subscripts
• coefficients
• reactants
• products

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-PS1-2

NGSS.MS-PS1-5

Which of the following is evidence of a chemical reaction?

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

Which of the following is NOT Evidence of a chemical change?

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

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

• 4g
• 5g
• 9g
• 14g

If a chemical reaction starts with 20g of reactants it should produce how many grams? 

• 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