7.1 - 4 Modeling Conservation of Mass

How many of each type of atom are in the formula NH₃?

• 1 nitrogen, 3 helium

• 1 neon, 3 hydrogen

• 3 nitrogen, 3 hydrogen

• 1 nitrogen, 3 hydrogen

Tags

NGSS.MS-PS1-1

The number and type of atoms of reactants is equal to the number and type of atoms of products describes which of the following?

• Equal mass equation

• Unbalanced chemical equation

• Law of conservation of energy

• Balanced chemical equation

Tags

NGSS.MS-PS1-5

Atom

• The smallest particle of an element that maintains the chemical identity of that element

• The process by which one or more substances change to produce one or more different substances

• The energy that is stored in all compounds and potentially released in chemical reactions

• The mass of all reactants must equal the mass of all products. Matter is neither created nor destroyed.

Tags

NGSS.MS-PS1-5

Conserve

• The smallest particle of an element that maintains the chemical identity of that element

• A strong chemical bond that is formed when atoms share pairs of electrons

• To maintain at a constant overall total

• The process by which one or more substances change to produce one or more different substances

Tags

NGSS.MS-PS1-5

Law of conservation of matter

• To maintain at a constant overall total

• A strong chemical bond that is formed when atoms share pairs of electrons

• The mass of all reactants must equal the mass of all products. Matter is neither created nor destroyed.

• The process by which one or more substances change to produce one or more different substances

Tags

NGSS.MS-PS1-5

How many of each type of atom are in 4NO₂?

• 8 nobelium

• 4 nitrogen, 6 oxygen

• 4 nitrogen, 8 oxygen

• 4 nitrogen, 2 oxygen

Tags

NGSS.MS-PS1-1

Chemical reaction

• The mass of all reactants must equal the mass of all products. Matter is neither created nor destroyed.

• The process by which one or more substances change to produce one or more different substances

• The energy that is stored in all compounds and potentially released in chemical reactions

• The smallest particle of an element that maintains the chemical identity of that element

Tags

NGSS.MS-PS1-5

Covalent bond

• The energy that is stored in all compounds and potentially released in chemical reactions

• A strong chemical bond that is formed when atoms share pairs of electrons

• To maintain at a constant overall total

• The process by which one or more substances change to produce one or more different substances

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-4

A student mixed baking soda and vinegar to test the law of conservation of mass. The student measured the mass before and after combining the substances. Which statement would they include in their conclusion to show evidence of the law of conservation of mass?

• Since a new substance was formed, it does not follow the law of conservation of mass.

• The mass of the substance after combining was less because gas was formed and has no mass.

• The substance remained a solid, so it follows the law of conservation of mass.

• The mass of the substance was equal before and after combining the baking soda and vinegar.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The energy that is stored in all compounds and potentially released in chemical reactions

• Covalent bond

• Conserve

• Chemical energy

• Atom