Chemical Equations

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What is a chemical equation?

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A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

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What are reactants in a chemical reaction?

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

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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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What does it mean to balance a chemical equation?

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Balancing a chemical equation means ensuring that the number of atoms for each element is the same on both sides of the equation.

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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; it is conserved.

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What is a coefficient in a chemical equation?

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A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or moles of that substance are involved.

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What is the difference between a physical change and a chemical change?

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A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

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What is sublimation?

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Sublimation is the process in which a solid changes directly into a gas without passing through the liquid state.

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How many elements are in the compound C6H12O6?

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There are 3 different elements in C6H12O6: Carbon (C), Hydrogen (H), and Oxygen (O).

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What is the significance of the coefficients in the equation 2H2 + O2 → 2H2O?

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The coefficients indicate the ratio of molecules that react and the ratio of molecules produced; in this case, 2 molecules of hydrogen react with 1 molecule of oxygen to produce 2 molecules of water.