Balancing Chemical Equations

Front

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.

Front

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.

Front

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.

Front

How do you determine the number of atoms in a molecule?

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The number of atoms in a molecule can be determined by looking at the subscripts in the chemical formula; for example, in H₂O, there are 2 hydrogen atoms and 1 oxygen atom.

Front

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 in the reaction.

Front

How many atoms of Oxygen are in 2H₂O?

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There are 2 oxygen atoms in 2H₂O.

Front

What is the formula for calculating the total number of atoms in a compound?

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To calculate the total number of atoms in a compound, multiply the number of atoms of each element by its subscript and then sum them up.

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How many atoms of Sodium (Na) are in Na₂CO₃?

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There are 2 sodium atoms in Na₂CO₃.

Front

What is the balanced equation for the reaction of hydrogen and oxygen to form water?

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2H₂ + O₂ -> 2H₂O.

Front

How many atoms of Carbon are in C₆H₁₂O₆?

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There are 6 carbon atoms in C₆H₁₂O₆.