Law of Conservation of Mass

A student mixes 125 grams of sugar, 250 grams of water and 5 grams of flavoring. The solution weighs...

• 250 grams

• 380 grams

• 375 grams

• 400 grams

Jamie weighs a glass of water and observes its weight to be 12 ounces. Jamie then adds 6 ice cubes to the glass of water. Each ice cube weighs one ounce. After all of the ice cubes have melted, what will be the approximate weight of the glass of water?

• 6 

• 12 

• 18 ounces

Tags

NGSS.MS-PS1-4

________ are the starting substances in a chemical equation.

• Reactants

• Producer

• Reaction

• Products

What do we call the chemicals that result from a chemical reaction?

• reactants

• products

• subscripts

• coefficients

Tags

NGSS.MS-PS1-5

How many grams of coal were present at the start of the chemical change?

• Unknown

• 100 g

• 200 g

• 50 g

Tags

NGSS.MS-PS1-5

How many grams of CHOCOLATE POWDER are shown in the example of conservation of mass below?

• 450 g

• 465 g

• 0 g

• 15 g

Tags

NGSS.MS-PS1-5

How many kilograms of SMOKE are shown in the example of conservation of mass?

• 1 kg

• 30 kg

• 28 kg

• 3 kg

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

How many grams of OXYGEN would be needed to show conservation of mass in the example below?

• 100 g

• 93 g

• 7 g

• 0 g

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which Chemical Equation is Balanced?

• CH₄+O₂------CO₂+2H₂O

• H₂+O₂-----2H₂O₄

• 4Al+3O₂-----2Al₂O₃

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Bob puts 200 grams of ice into a pitcher with 900 grams of water. He gets distracted and comes back later to find that the ice has melted in the water. How many grams of water does Bob now have in the pitcher?

• 200 g

• 700 g

• 1,100 g

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-4