Law of Conservation of Mass 8th grade

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What is the Law of Conservation of Mass?

Back

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 chemical formula?

Back

To determine the number of atoms in a chemical formula, count the subscripts next to each element. If there is no subscript, it is understood to be 1.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

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What happens to mass in a chemical reaction?

Back

In a chemical reaction, the total mass of the reactants equals the total mass of the products, demonstrating the Law of Conservation of Mass.

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What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

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What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy to its surroundings, usually in the form of heat.

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How do you calculate the mass of a missing reactant or product?

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To calculate the mass of a missing reactant or product, use the equation: Mass of reactants = Mass of products.

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What is the significance of coefficients in a chemical equation?

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Coefficients indicate the number of molecules or moles of each substance involved in the reaction and are used to balance the equation.

Front

What is the formula for magnesium fluoride?

Back

The formula for magnesium fluoride is MgF₂, indicating one magnesium atom and two fluorine atoms.

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How many grams of magnesium fluoride are produced from 24 g of magnesium and 38 g of fluorine?

Back

62 g of magnesium fluoride are produced from 24 g of magnesium and 38 g of fluorine.