Chemical Equations and Balancing

Is this equation balanced?

SO₃ + H₂O --> H₂SO₄

• yes

• no

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

  Mg₂ + HCl --->  MgCl₂ + H₂

• Yes

• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The coefficient in 3H₂O is

• 6

• 5

• 2

• 3

What is the left part of a chemical equation called?

• Reactants

• Yields

• Products

• Chemical equation

To balance an equation you should:

• ONLY change subscripts.

• ONLY change coefficients.

• Change BOTH subscripts and coefficients.

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation

What is the little number after an element in a chemical equation called?

• Coefficient

• Atom

• Subscript

• Equation

What is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

• Coefficient

• Atom

• Subscript

• Equation

In the equation, 2Mg + O₂ ---> 2MgO, which are the REACTANTS?

• Mg and O

• Mg and MgO

• MgO

• O and MgO

Tags

NGSS.MS-PS1-2

This is used to represent the amount of each atom in a molecule. What is the arrow pointing to?

• Exponent

• Coefficient

• Molecule

• Subscript

Tags

NGSS.MS-PS1-1