Chemical Reactions

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What is a chemical change?

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A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, or the production of gas.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition, such as changes in state or shape.

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What are reactants in a chemical reaction?

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Reactants are the starting substances in a chemical reaction that undergo change to form products.

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What are products in a chemical reaction?

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Products are the substances that are formed as a result of a chemical reaction.

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How do you determine the number of atoms in a molecule?

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To determine the number of atoms in a molecule, add the subscripts of each element in the chemical formula.

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What is the chemical formula for serotonin?

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The chemical formula for serotonin is C10H12N2O.

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How many total atoms are in the molecule C10H12N2O?

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There are 25 total atoms in the molecule C10H12N2O.

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What does the coefficient in a chemical formula indicate?

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The coefficient indicates the number of molecules or moles of a substance in a chemical reaction.

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In the compound 6MgF2, how many fluorine (F) atoms are present?

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There are 12 fluorine (F) atoms in the compound 6MgF2.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.