Mass of Conservation

Mr. Williams' class conducted an experiment by combining 8 ounces of vinegar with 6 ounces of lemon juice. The experiment occurs in a closed container weighing 4 ounces. After the interaction, what is the weight of the container and solution?

• 10 ounces

• 11 ounces

• 14 ounces

• 18 ounces

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-PS1-2

NGSS.MS-PS1-5

Why does this picture demonstrate the Law of Conservation of Mass?

• the number of atoms of each element are the same on both sides

• they start out separate and end up combined

• the same elements are used

• it doesn't demonstrate the Law of Conservation of Mass

Tags

NGSS.MS-PS1-5

A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?

• 500 grams, because the cheese does not gain or lose mass just because it was melted

• 499 grams, because some of the cheese evaporates as it melts

• 502 grams, because the cheese absorbs heat as it melts

Tags

NGSS.MS-PS1-4

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 have?

• 4g

• 5g

• 9g

• 14g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If reaction starts with 20g of reactants it should produce 

• 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

Tags

NGSS.MS-PS1-5

If a reaction starts with a total 75g of reactants it should produce 

• a total of 40g of products

• a total of 75g of products

• a total of 180 g of products

• None of the above

Tags

NGSS.MS-PS1-5

In the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?

• 17g

• 2g

• 7g

• None of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a closed system, if you start with 100 grams of reactants, what should be the total mass of the products after the reaction?

• 100 grams

• 90 grams

• 110 grams

• 95 grams

Tags

NGSS.MS-PS1-5

A sealed container has 50 grams of ice. After melting, what is the mass of the water inside the container?

• 50 grams

• 45 grams

• 55 grams

• 60 grams

Tags

NGSS.MS-PS1-5