Types of Chemical Reactions, Balancing and Molar Mass Test

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What is a synthesis reaction?

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A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product. Example: 2 H₂ + O₂ → 2 H₂O.

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What is a double displacement reaction?

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A double displacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds. Example: 2 NaBr + Ca(OH)₂ → CaBr₂ + 2 NaOH.

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What is a single displacement reaction?

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A single displacement reaction is a type of chemical reaction where one element replaces another in a compound. Example: 3 Pb + 2 H₃PO₄ → 3 H₂ + Pb₃(PO₄)₂.

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What is the molar mass of a compound?

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The molar mass of a compound is the mass of one mole of that compound, measured in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in the formula.

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How do you calculate the number of oxygen atoms in a compound?

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To calculate the number of oxygen atoms in a compound, identify the subscript of oxygen in the chemical formula and multiply it by the coefficient if present. Example: In Al₂(SO₄)₃, there are 12 oxygen atoms.

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What is the balanced equation for the synthesis of water?

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The balanced equation for the synthesis of water is 2 H₂ + O₂ → 2 H₂O.

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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 with different properties.

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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.

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What is the formula for calculating molar mass?

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The formula for calculating molar mass is: Molar Mass = (Number of atoms of element 1 × Atomic mass of element 1) + (Number of atoms of element 2 × Atomic mass of element 2) + ...

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What is a combustion reaction?

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A combustion reaction is a type of chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat. Example: CH₄ + 2 O₂ → CO₂ + 2 H₂O.