Chemical Equations

8.5D Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

Tags

NGSS.MS-PS1-1

8.5D How many Hydrogen atoms are on the reactant side of this chemical equation?            
2C₂H₂ + 5O₂  --->  4CO₂ + 2H₂O

• 2
• 4
• 6
• 8

The law of conservation of mass states that....

• Matter can be created
• Matter is sometimes destroyed
• Matter cannot be created or destroyed
• Matter can be created but not destroyed

Tags

NGSS.HS-PS1-7

8.5F In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams should reactant B have? 

• 4g
• 5g
• 9g
• 14g

Tags

NGSS.HS-PS1-7

8.5D What information could a student determine from only the chemical formula of a protein?

• The color of the protein.
• The number of molecules in each sequence that makes up a protein.
• The physical arrangement of atoms in the structure of the protein.
• The number of atoms of each element in the protein.

8.5D How many Carbon atoms are on the product side of this chemical equation?            
2C₂H₂ + 5O₂  --->  4CO₂ + 2H₂O

• 2
• 3
• 4
• 5

Tags

NGSS.MS-PS1-1

The substances at the beginning of a chemical equation are called the ____

• product
• yield
• chemical symbol
• reactants

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

Tags

NGSS.HS-PS1-7

The red numbers in the image below represent ________

• subscripts
• coefficients
• I don't know, and don't want to try
• None of the answers are correct

Tags

NGSS.HS-PS1-7

8.5F Is this equation balanced?

• yes
• no
• Not enough information

Tags

NGSS.HS-PS1-7