Conservation of Matter

Can matter be created or destroyed?

• YES

• NO

The number of atoms that are on the left (reactants) should be __________ the number of atoms that are on the right (products).

• the same

• different

• greater than

• lesser than

If a reaction starts with a mass of 80 grams, what will the mass of the products be?

• 80 grams

• 800 grams

• 100 grams

• 0 grams

How does this diagram represent the law of conservation of matter?

• When the coal is not burned its mass is 100 grams, after it is burned the mass is 100 grams. The mass is conserved.

• Before the mass is 100 grams, after it burns the mass is 10 grams. The mass decreased.

• The gasses in the glass dome are greater than the coal's physical mass in the beginning. Mass changes when there is a chemical change.

• When coal is burned, its mass is 100 grams. It disappears into the atmosphere, we assume the mass is the same or greater.

In a chemical reaction the atoms are..?

• swapped

• rearranged

• moved

• don't change

Reactants are..?

• BEFORE the arrow

• AFTER the arrow

What are the reactants for this formula?

• C6H12O6

• 6O2

• 6CO2

• 6H2O

• ATP

Products are..?

• LEFT of the arrow

• RIGHT of the arrow

Balancing a chemical equation so that it follows the law of conservation of matter requires?

• having the same number and type of atoms on both sides of the equation

• making sure the reactants and products are in the same phase

• keeping the total charge the same on both sides of the equation

• changing the formulas of the products and reactants

Which image shows that matter has been conserved?

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