Matter- Conservation of Matter and Mass

An oreo cookie has a mass of 20 grams. It gets crushed into crumbs for a recipe. What is the mass of the crumbs?

• 15 grams

• 25 grams

• 20 grams

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

If reaction starts with 20g of reactants, it will 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

How many of each type of atom are in the formula NH₃?

• 1 nitrogen, 3 hydrogen

• 3 nitrogen, 3 hydrogen

• 1 neon, 3 hydrogen

• 1 nitrogen, 3 helium

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

What will have more mass when a chemical change is complete: the reactants before the chemical reaction or the product after the reaction is complete?

• They both will have the same mass

• The product always has more mass than the reactant

• The reactant will have more mass than the product

• They both will lose mass after the reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If there are 4 H atoms on the reactant side, how many H atoms will be on the product side? 

• 2
• 4
• 6
• You need more information to answer this question

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of matter states that the total amount of matter ______________ after it undergoes change.

• disappears
• stays the same
• weighs less
• explodes

Tags

NGSS.MS-PS1-5

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-PS1-5

Why does the weight of the dry ice go down while it's sitting on the scale?

• it's melting
• it's disappearing
• turning into a gas
• none of these

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

If 25 grams of sugar dissolves into 150 grams of water, what is the new weight of the liquid?

• 125 g
• 150 g
• 25 g
• 175 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5