01-Intro to Chemical Equations

The number of atoms of oxygen in 
Cu(NO₃)₂ is ...

• 2
• 5
• 6
• zero 

Tags

NGSS.MS-PS1-1

The correct chemical formula for calcium carbonate is ....

• CaCO₃
• Ca₂CO₃
• Na₂CO₃
• CO₂

Tags

NGSS.MS-PS1-1

CaCO₃ represents a chemical

• Symbol
• Formula
• Subscript
• Reaction

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NGSS.MS-PS1-1

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

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NGSS.MS-PS1-5

How many Oxygen (O) atoms are in 2C₂HO₈C_l2

• 2
• 16
• 8
• 5

Tags

NGSS.MS-PS1-1

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

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NGSS.MS-PS1-1

How many IRON (Fe) atoms are in this chemical formula?

• 4 iron atoms

• 2 iron atoms

• 8 iron atoms

• 3 iron atoms

Tags

NGSS.MS-PS1-1

Element or compound?
H₂O

• element
• compound

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NGSS.MS-PS1-1

Element or compound?
O₂

• Element
• Compound

Tags

NGSS.MS-PS1-1

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

Tags

NGSS.MS-PS1-1