Chemical Equation

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

How many atoms of carbon (C) are in  C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Tags

NGSS.MS-PS1-1

Element or compound?
H₂O

• element
• compound

Tags

NGSS.MS-PS1-1

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

How many TOTAL atoms are in the following chemical formula?
3H₂O

• 7
• 6
• 9
• 8

Tags

NGSS.MS-PS1-1

Which of the following models best demonstrates a balanced chemical equation?

• F
• G
• H
• J

Tags

NGSS.MS-PS1-5

How many atoms of hydrogen (H), sulfur (S), and oxygen (O) are there in sulfuric acid (H₂SO₄)?

• H-6, S-4, O-4
• H-1, S-2, O-8
• H-2, S-1, O-4
• H-2, S-4, O-4

Tags

NGSS.MS-PS1-1

Balance this equation...
HgO --> Hg + O₂

• It is balanced 
• 2HgO --> Hg + O₂
• 2HgO --> 2Hg + O₂

Balance this equation...
H₂ + Cl₂ --> HCl

• It is balanced 
• 3H₂ + Cl_{2 -->} 6H₂Cl
• H₂ + Cl_{2 -->} 2HCl

Which are the reactants in the following reaction?

2Mg + O₂ ---> 2MgO

• Mg and O₂

• MgO

• Mg and MgO

• O₂ and MgO