Chem 1 Unit 7 Exam Review

An oreo cookie weighs 20 grams.  It gets crushed into crumbs for a recipe.  How much do its crumbs weigh?

• 15 grams
• 25 grams
• 20 grams

Tags

NGSS.HS-PS1-7

If reaction starts with 20g of reactants it should produce... 

• a total of 40g of product
• a total of 10g of product
• a total of 80 g of product
• a total of 20g of product

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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-PS1-2

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-PS1-2

NGSS.MS-PS1-5

Predict the precipitate when you mix silver nitrate and sodium chloride:

• AgNO₃

• No precipitate

• AgCl

• NaNO₃

When you mix barium nitrate and sodium sulfate

• BaSO₄

• NaNO₃

• No precipitate

• BaNO₃

When you mix magnesium nitrate and sodium hydroxide

• No precipitate

• NaOH

• NaNO₃

• Mg(OH)₂

When you mix sodium carbonate and copper chloride

• NaCl

• CuCO₃

• CuCl₂

• No precipitate

Tags

NGSS.HS-PS1-7

When you mix lithium iodide and silver nitrate

• AgI

• LiNO₃

• AgCl

• All of the above

Tags

NGSS.HS-PS1-2

Which is the correct net ionic equation for the reaction of AgNO₃ and CaCl₂?

• Ca²⁺(aq) +  2Cl^- (aq) → CaCl(s)
• Ag⁺(aq)  +  Cl^- (aq) → AgCl(s)
• Ag +  Cl  →  AgCl
• Ag⁺  +  Ca²⁺   →Ag₂Ca (s)