Chemical Formulas/Equations

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What is a chemical formula?

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A chemical formula represents a substance using symbols for its constituent elements and numbers to indicate the ratio of atoms.

Tags

NGSS.MS-PS1-1

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What do the subscripts in a chemical formula indicate?

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Subscripts indicate the number of atoms of each element in a molecule.

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NGSS.MS-PS1-1

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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.

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NGSS.MS-PS1-5

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Where are reactants found in a chemical equation?

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Reactants are found on the left side of the arrow in a chemical equation.

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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, found on the right side of the arrow.

Tags

NGSS.MS-PS1-5

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What is a coefficient in a chemical formula?

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A coefficient is a larger number placed before a chemical formula to indicate how many molecules are involved in the reaction.

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How do you balance a chemical equation?

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To balance a chemical equation, adjust the coefficients to ensure the same number of each type of atom appears on both sides.

Tags

NGSS.MS-PS1-5

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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.

Tags

NGSS.MS-PS1-5

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What does it mean to take inventory of elements in a compound?

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Taking inventory means counting the number of each type of atom present in a chemical formula.

Tags

NGSS.MS-PS1-1

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What is the difference between a mixture and a compound?

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A mixture is a combination of two or more substances that retain their individual properties, while a compound is a substance formed when two or more elements chemically bond.