Balancing/Identifying Chem equations & Rxn's

What is the number in front of a chemical formula called?

• Coefficient
• Superscript
• Subscript
• Exponent

Subscripts balance _______ while Coefficients balance ___________ and _________

• Numbers: symbols and letters

• Numbers: Numbers and charges

• Atoms: Molecules and compounds

• Charges: Compounds and molecules

How many atoms are in the following compound? 3-H2O

• H:2 O:1
• H:5 O:1
• H:6 O:3
• H:5 O:3

Tags

NGSS.MS-PS1-1

• Mg

Tags

NGSS.HS-PS1-1

In a chemical equation, the symbol for a substance in water solution is followed by...

• (l)

• (g)

• (s)

• (aq)

Which equation is is the correct formula equation for "sulfur plus oxygen react to yield sulfur dioxide"?

• a

• b

• c

• d

To balance a chemical equation, it may be necessary to adjust the ________.

• subscripts

• formulas of the products

• formulas of the reactants

• coefficients

Which of the following chemical formulas represents potassium phosphate?

• a

• b

• c

• d

Balance the following chemical reaction:

Tags

NGSS.HS-PS1-7

• H2 = 2

  O2 = 1

  H2O = 2

• H2 = 1

  O2 = 2

  H2O = 2

• H2 = 3

  O2 = 4

  H2O = 2

• H2 = 1

  O2 = 1

  H2O = 2

Tags

NGSS.HS-PS1-7