Law of Conservation of Matter

This is used to represent the number of each atom being represented. 

• A Exponent
• The Coefficient
• A Molecule
• The Subscript

Tags

NGSS.MS-PS1-1

This appears on the left side of a chemical formula, and represents how many molecules there are. 

• An Atom
• The Subscript
• A Molecule
• The Coefficient

Tags

NGSS.MS-PS1-1

How many hydrogen atoms are in this chemical formula: 

• 4 hydrogen atoms
• 1 hydrogen atom
• 2 hydrogen atoms
• 3 hydrogen atoms

Tags

NGSS.MS-PS1-1

How many oxygen atoms are in this chemical formula?

• 7 oxygen atoms
• 4 oxygen atoms
• 3 oxygen atoms
• 1 oxygen atoms

Tags

NGSS.MS-PS1-1

How many oxygen atoms are in this chemical formula?

• 6 oxygen atoms
• 2 oxygen atoms
• 3 oxygen atoms
• 4 oxygen atoms

Tags

NGSS.MS-PS1-1

Is this balanced?
2HgO → 2Hg + O₂

• Yes
• No

Tags

NGSS.MS-PS1-5

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes
• No

Tags

NGSS.MS-PS1-5

Law of conservation of mass states that 

• matter is created
• matter is destroyed
• matter is neither created nor destroyed
• matter does not change

Tags

NGSS.MS-PS1-5

True or false.  Law of conservation of mass means that the number of atoms of the products is more than the number of atoms in the reactants. 

• True
• False

Tags

NGSS.MS-PS1-5

Which are chemical changes

• Iron rusting 
• Glass breaking
• Clothing ripping
• Hair cut

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5