Law of Conservation of Mass (Quick Quiz)

Number of C's in 2Na₂CO₃

• 1
• 2
• 3
• 5

Tags

NGSS.MS-PS1-1

The number of Na's in Na₂CO₃

• 1
• 2
• 3
• 6

Tags

NGSS.MS-PS1-1

How many Elements are in the compound C₂H₈O ?

• 2
• 1
• 3
• 0

Tags

NGSS.MS-PS1-1

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Does this follow the law of conservation of mass (Balanced?): Yes or No

3HgO → 2Hg + O₂

• Yes

• No

Tags

NGSS.MS-PS1-5

What are the REACTANTS :

H₂O + CO₂ → HCO + HO

• H₂O + CO₂

• HCO + HO

• H₂O ONLY

• HCO ONLY

Tags

NGSS.MS-PS1-2

Does this follow the law of conservation of mass:

Yes No

2Fe₂O₃ + 3C --> 4Fe + 3 CO₂

• Yes

• No

Tags

NGSS.MS-PS1-5

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The number in front of a compound or element is a 

• Subscript
• Coefficient
• Superscript
• Charge

A chemical reaction is balanced when...

• Both sides have the same elements
• Both sides have the same number of atoms of each element
• Both sides have the same subscripts for each element 
• Both sides have the same coefficients for each compound/molecule

Tags

NGSS.MS-PS1-5