balancing check in Walters

What is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

• Coefficient

• Atom

• Subscript

• Equation

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

Example: H₂

• Coefficient

• Atom

• Subscript

• Equation

How many different elements are in C₆H₁₂O₆?

• 24

• 12

• 3

• 6

How many oxygens are represented in the picture?

• 2

• 3

• 5

• 6

Which side of a chemical equation is the reactant side?

• Left (before the arrow)

• Right (after the arrow)

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation

what do you call the "arrow" sign that separates the reactants and products in a skeleton equation, and what does it mean?

• the "reacts " sign means "yields to produce"

• the "yields" sign means "reacts to produce"

• the "produce " sign means "react to yields"

• the "riot " sign means "yells to provoke"

Balance this equation:

HgO ---> 2Hg + O₂

• It is balanced.

• 2HgO ---> 2Hg + O₂

• 2HgO ---> Hg + O₂

• HgO ---> Hg + 2O₂

Is this equation balanced?

• Yes, everything appears the same amount on each side.

• No, there are too many hydrogens on the left side.

• No, there are too many oxygen on the left side.

Is the following equation balanced?

Al + O₂ ---> 2Al₂O₃

• YES

• NO