Free Printable Conservation of mass

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Conservation of mass

Total questions: 18

Worksheet time: 11mins

Name

Class

Date

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

Matter can not be created nor destroyed: it can only be

Destroyed a little bit

Invisible

Transformed, changed

None of the above

Which of these is not a chemical reaction?

Burning of wood

Milk going bad

Mixing vinegar and baking soda

Melting of ice

A precipitate is a

liquid that forms when two solids are reacted

a solid that forms when two liquids are mixed

a gas that forms when vinegar and baking soda react

a change of color in a solution

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

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

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 theapproximate weight of the glass of water?

18 ounces

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

reactants

products

subscripts

coefficients

According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?

The wood disappears.

It stays the same chemically.

The atoms in the wood and oxygen rearrange and form smoke and ash.

Nothing.

10.

________ are the starting substances in a chemical equation.

Reactants

Producer

Reaction

Products

11.

The law of conservation of mass states that ________

the total mass of reactants is more than the total mass of products

the mass of a chemical reaction is not constant

the mass of a chemical reaction remains constant

the total mass of reactants is less than the total mass of products

12.

The Law of Conservation of Mass States

Energy cannot be created nor destroyed, it can only change form.

Mass cannot be created nor destroyed, it can only change form.

Mass can be created or destroyed, it cannot change form.

13.

Measure of the amount of matter

mass

volume

weight

density

14.

Which side of a chemical equation is the reactant side?

Left (before the yields sign)

Right (after the yields sign)

15.

Which side of a chemical equation os the product side?

Left (before the yields sign)

Right (after the yields sign)

16.

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O

Reactants

Products

Yields

Chemical Equation

17.

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂--> 2Al₂O₃

18.

Read the following chemical formula: C₆H₁₂O₆. How many hydrogen atoms are in the formula?

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Conservation of mass

Total questions: 18

Worksheet time: 11mins

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