Law of Conservation of Mass 1

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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 the reactants equals the total mass of the products.

Tags

NGSS.MS-PS1-5

Front

How do you determine if a chemical equation is balanced?

Back

A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

Tags

NGSS.MS-PS1-5

Front

What does the coefficient in a chemical formula represent?

Back

The coefficient in a chemical formula indicates the number of molecules or moles of that substance.

Tags

NGSS.MS-PS1-5

Front

In the equation 2SO₂ + 2H₂O₂ ----> 2H₂SO₄, how many total hydrogen atoms are present in the products?

Back

There are 4 hydrogen atoms present in the products.

Tags

NGSS.MS-PS1-1

Front

How many nitrogen atoms are in the molecule NH₃?

Back

There is 1 nitrogen atom in the molecule NH₃.

Tags

NGSS.MS-PS1-1

Front

If 24 g of magnesium reacts with 38 g of fluorine, what is the total mass of magnesium fluoride produced?

Back

The total mass of magnesium fluoride produced is 62 g.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, reflecting the conservation of mass.

Tags

NGSS.MS-PS1-5

Front

What is the significance of subscripts in a chemical formula?

Back

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

Front

What is the role of coefficients in balancing chemical equations?

Back

Coefficients are used to multiply the number of molecules of reactants and products to ensure that the number of atoms for each element is equal on both sides.

Tags

NGSS.MS-PS1-5

Front

What is the relationship between reactants and products in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change to form products, which are the substances produced by the reaction.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5