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Questions and Answers
What is the purpose of the arrow in a chemical equation?
What is the purpose of the arrow in a chemical equation?
- To show the stoichiometric coefficients
- To indicate the direction of the reaction (correct)
- To separate the reactants and products
- To indicate the chemical formulas
What do the coefficients next to the symbols and formulas represent in a chemical equation?
What do the coefficients next to the symbols and formulas represent in a chemical equation?
- The number of atoms in the substance
- The phase of matter of the substance
- The absolute values of the stoichiometric numbers (correct)
- The molar mass of the substance
How are multiple substances on any side of a chemical equation separated?
How are multiple substances on any side of a chemical equation separated?
- By a plus sign (correct)
- By a minus sign
- By a comma
- By an equal sign
What is specified by a chemical formula in a chemical equation?
What is specified by a chemical formula in a chemical equation?
What was the first year when a chemical equation was diagrammed?
What was the first year when a chemical equation was diagrammed?
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Study Notes
Chemical Equations
- The arrow in a chemical equation indicates the direction of the reaction, with the reactants on the left and the products on the right.
- Coefficients next to the symbols and formulas in a chemical equation represent the number of molecules or formula units of each reactant or product.
- Multiple substances on any side of a chemical equation are separated by a plus sign (+).
- A chemical formula in a chemical equation specifies the type and number of atoms of each element in a compound.
- The first recorded chemical equation was diagrammed by French chemist Jean Beguin in 1615.
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