What is the chemical symbol for Oxygen?

• Ox

• O3

• O

• O2

Identify the chemical symbol for Sodium.

• K

• Cl

• Ca

• Na

How many atoms of Carbon are in C6H12O6?

• 6

• 3

• 6.02

• 12

What is the balanced equation for the combustion of methane (CH4)?

• CH4 + 3 O2 -> 2 CO2 + 2 H2O

• CH4 + O2 -> CO + H2O

• CH4 + 2 O2 -> CO2 + 2 H2O

• CH4 + O2 -> 2 CO2 + H2O

Balance the equation: H2 + O2 → H2O.

• 2 H2 + O2 → 2 H2O

• H2 + O2 → H2 + O2

• 2 H2 + 2 O2 → 2 H2O

• H2 + O2 → H2O

How many molecules are produced in the reaction 2H2 + O2 → 2H2O?

• 2

• 4

• 3

• 1

What is the chemical symbol for Iron?

• Fe

• I

• Fe2

• Ir

Identify the number of Nitrogen atoms in N2O4.

• 2

• 4

• 3

• 1

Balance the equation: Na + Cl2 → NaCl.

• 2Na + Cl → NaCl

• 2Na + Cl2 → 2NaCl

• Na + 2Cl2 → NaCl2

• Na + Cl2 → Na2Cl

How many total atoms are in the formula CaCO3?

• 4

• 6

• 3

• 5