Unit 4.4 Honors Practice (Equations/Reactions)

In any chemical reaction, the mass of the products is always:

• slightly less than the mass of the reactants
• much less than the mass of the reactants
• the same as the mass of the reactants
• greater than the mass of the reactants

Tags

NGSS.HS-PS1-7

Which of the following elements would require a subscript of 2 when written in a chemical equation (due to being diatomic)?

• solid carbon (C)

• gaseous neon (Ne)

• gaseous chlorine (Cl)

• gaseous helium (He)

A precipitate is...

• a gas

• a liquid

• a solid

• a solution

To balance a chemical reaction, it may be necessary to adjust the

• coefficients

• exponents

• subscripts

• formulas of the products

Tags

NGSS.HS-PS1-7

How many oxygen atoms are shown here (taking into account the coefficient)?

• 4

• 3

• 12

• 1

Tags

NGSS.MS-PS1-1

This equation is an example of which general type of reaction?  $Mg_{(s)}+2HCl_{(aq)}\ →\ H_{2(g)}+MgCl_{2(aq)}$  

• synthesis

• decomposition

• single-displacement 

• double-displacement

What are always the product(s) of the complete combustion of a hydrocarbon (like CH₄)

• O₂

• Acids and Bases

• H₂O and CO₂

• H₂ and C

What type of reaction is shown in the image?

• synthesis

• decomposition

• combustion

• single-displacement

2 NH₃+ 1 H₂SO₄ ----> 1 (NH₄)₂SO₄

• Synthesis (or combination)
• Decomposition
• Single displacement
• Double displacement

Tags

NGSS.MS-PS1-2

Na₃PO₄ + 3 KOH ----> 3 NaOH + K₃PO₄

• Synthesis (or combination)
• Decomposition
• Single displacement
• Double displacement