Chemical Reactions

What is the arrow in a chemical equation...
H_{2 +} O --> H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

Name this reaction, Cl₂ + 2KI _-->  I₂ + 2KCl

• Synthesis
• Single Replacement
• Double Replacement
• Decomposition

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

• product
• yield
• chemical symbol
• reactants

Tags

NGSS.MS-PS1-5

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

Which of the following is evidence of a chemical reaction?

• fizzing
• water changing to ice
• saltwater
• paper being cut in half

Tags

NGSS.MS-PS1-2

Which is the balanced equation?

• A
• B
• C
• D

An element plus additional element reacts to form one product is an example of which type of chemical reaction?
A + B --> AB 

• combustion
• decomposition 
• synthesis 
• single replacement

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

The symbol for a substance dissolved in water is

• (s)
• (l)
• (g)
• (aq)

 Predict the product(s):  H₂O -->

• H and O
• H₂ and O₂
• H and OH

Tags

NGSS.HS-PS1-2