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A chemical substance that is present at the start of a chemical reaction
reactants
the substances that are formed by the chemical change
products
A chemical change in which a substance combines with oxygen, as when iron oxidizes, forming rust
Oxidation
a measure of how quickly a specific material is capable of catching fire and burning.
Flammability
a principle stating that mass cannot be created or destroyed.
conservation of mass
What is the mass of the reactants equal to?
mass of products
If the mass of the products measured 120 g, what would be the mass of the reactants?
120 g
In chemical reactions, atoms are
combined, separated, or rearranged
gas produced, light produced, formation of percipitate, temp change, permanent colour change
chemical reaction signs
If 50 grams of sodium reacts with chlorine to form 126 grams of salt. How many grams of chlorine reacted?
76 gram
If 178.8 g of water is separated into hydrogen and oxygen gas, and the hydrogen gas has a mass of 20.0 g. What is the mass of the oxygen gas produced?
158.8 g
From a laboratory process, a student collects 28.0 g of hydrogen and 224.0 g of oxygen. How much water was originally involved in the process?
252 g
A 10 gram sample of iron reacts with oxygen to form 18.2 grams of ferric oxide. How many grams of oxygen reacted?
8.2 g
