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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 a chemical formula?

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A chemical formula is a shorthand notation that represents a compound or molecule, indicating the types and numbers of atoms present.

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What are reactants in a chemical equation?

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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 equation?

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

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How do you determine the number of atoms in a chemical formula?

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Count the subscripts in the formula; if no subscript is present, it is assumed to be one.

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NGSS.MS-PS1-1

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What is the difference between a solid, liquid, and gas?

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Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither a definite shape nor volume.

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What is a chemical reaction?

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A chemical reaction is a process in which substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

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What is the significance of subscripts in a chemical formula?

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Subscripts indicate the number of atoms of each element in a molecule; for example, in H2O, the '2' indicates there are two hydrogen atoms.

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What is the role of coefficients in a chemical equation?

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Coefficients indicate the number of molecules or moles of a substance involved in a reaction, helping to balance the equation.

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What is an example of a gas?

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Air is an example of a gas, which is a mixture of different gases including nitrogen, oxygen, and carbon dioxide.