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Law of Conservation of Mass
Chemical Reaction
Chemical Equations
Counting Atoms
Miscellaneous
100
This states that matter cannot be created nor destroyed.
What is Law of Conservation of Mass?
100

These are the substances that start the reaction and are used up to form new substances. found on the left side of the arrow.

What is reactant?

100

Tells you if the equation if balanced/ conserved.

If the number of atoms in the product side is equal to the reactants the atom are?

100

How many atoms are in H₂O?

What is 3 atoms? (2 H, 1 O)

100
The smallest unit that makes up everything.
What is atom?
200
By definition, the Law of Conservation of Mass states that matter (mass) may not be __________ nor _________ .
What is created /destroyed?
200

This sign indicates the direction of the reaction, and separates reactants from products.

What is arrow?

200

Is the equation H₂ + O₂ → H₂O balanced as written?

What is no?

200

Tells you the number of molecules of a given substance in a chemical equation. Hint: you multiply it by the subscript 

What is coefficient?

200
The force that pulls atoms together
What is chemical bond?
300
The masses of the reactants and the products in a chemical reaction according to the Law of conservation of mass should always be ____.
What is equal?
300
It is the end result of a chemical reaction.
What is product?
300

Is C + O₂ → CO₂ already balanced?

What is yes?

300

How many atoms are in NaCl₂?

What is 3 atoms? (1 Na, 2 Cl)

300
A type of change that occurs when new substances are formed.
What is chemical change?
400
Twelve grams of reactant X react with fifteen grams of reactant Y. This is the total mass of the product(s).
What is twenty seven (27) grams?
400
This tells the number of atoms in a chemical equation.
What is subscript?
400

Balance H₂ + Cl₂ → HCl. What coefficient goes in front of HCl?

What is two (2)?

400

How many atoms are in 2CoBr₂?

What is 6 atoms? (2 Co, 4 Br) 

400
Two evidences that a chemical change is happening to a substance
What are color change/temperature change/new substance is formed/bubbling/fizzing/change in odor?
500
In a chemical reaction, 50 g of Chlorine is used to produce 95 grams of Sodium Chloride. How much Sodium was used?
What is forty-five (45) grams?
500

Rust forming on iron, burning wood, and baking a cake all show this clue that a chemical reaction has occurred.

What is irreversibility / a new substance forms?

500

Balance Na + Cl₂ → 2NaCl  What coefficient goes in front of Na?

What is two (2)?

500

How many total atoms are in 3H₂SO₄?

What is 21 atoms? Each H₂SO₄ has 7 atoms → 3 × 7 = 21

500
The chemical formula for table salt.
What is NaCl?