Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or atoms of that substance are involved in the reaction.

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How do you determine the number of atoms of an element in a chemical equation?

Back

Count the coefficients and subscripts in the chemical formula. For example, in 4Al + 3O2 --> 2Al2O3, there are 4 aluminum atoms on the left side.

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What are the products in a chemical equation?

Back

The products are the substances formed as a result of a chemical reaction, found on the right side of the equation.

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What are reactants in a chemical equation?

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Reactants are the starting substances that undergo a chemical change, found on the left side of the equation.

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How many total atoms are in H2SO4?

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There are 7 total atoms in H2SO4: 2 hydrogen, 1 sulfur, and 4 oxygen.

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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 of 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; the total mass of reactants equals the total mass of products.

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What is a chemical equation?

Back

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 is the significance of the arrow in a chemical equation?

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The arrow indicates the direction of the reaction, showing that reactants are transformed into products.

Front

What is a subscript in a chemical formula?

Back

A subscript is a number written below and to the right of a chemical symbol, indicating the number of atoms of that element in a molecule.