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Chemistry
Vocabulary for Chemistry
Term | Definition |
---|---|
Chemical Reaction | A reaction in which a new substance is formed with different properties from the original. Ex. Burning Wood |
Products | Those chemicals that are produced from the chemical reaction. (Ex: A+B->C+D -- C and D are the products.) |
Law of Conservation of Matter (Mass) | States that Matter can neither be created nor destroyed. In a chemical reaction, the mass of the reactants and the products will be equal. |
Exothermic | Exothermic Chemical ReactionOccurs when the chemical reaction releases heat. Products become warmer than the reactants. |
Coeffecient | This number that proeceeds the chemical formula and tells you the number of molecules in the compound |
Subscript | This number follows the element in a chemical formula and tells you the number of atoms for that particular element |
Physical Reaction | A reaction in which the form or appearance of a substance alters without changing its identity. Example: Water Boiling or Ice Melting. |
Molecule | Group of two or more atoms held by a strong bond |
Reactants | Those chemicals that start the chemical reaction. (Ex: A+B->C+D -- A and B are the reactants.) |
Which number is the coefficient of in the chemical formula 2MgO? | 2 |
How many molecules are in the chemical formula 2MgO? | 2 |
How many elements are in the chemical formula 2MgO? | 1 |
How many total atoms of Mg are in the chemical formula 2MgO? | 2 |
What is the subscript of oxygen in 2MgO? | 1 |
In the equation 2Mg + O2(subscript) = 2MgO, what is the product? | 2MgO |
Is the equation Mg + O2(subscript) = 2MgO balanced? | No |
Is the equation 2Mg + O2(subscript) = 2MgO balanced? | Yes |