Writing Equations
Balanced Equations
Ionic Compounds
Molecular Compounds
100

Write the unbalanced chemical equation for hydrogen gas reacting with oxygen gas to form water.

What is H2 + O2 --> H2O?

100

Balance the equation _H2 + _Cl2 --> _HCl.

What is H2 + Cl2 --> 2HCl?

100

This is the name of the compound with the formula NaBr.

What is sodium bromide?

100

What is the name of the compound CO?

What is carbon monoxide?

200

Write the unbalanced equation for potassium chlorate decomposing into potassium chloride and oxygen gas.

What is KClO3 --> KCl + O2?

200
What is the correct balanced equation for the reaction of aluminum with oxygen to form aluminum oxide?

What is 4Al + 3O2 --> 2Al2O3?

200

Write the formula for magnesium chloride.

What is MgCl2?

200

Write the formula for dinitrogen trioxide.

What is N203?

300

Write the unbalanced equation for sodium reacting with chlorine gas to form sodium chloride.

What is Na + Cl2 --> NaCl?

300

Balance this chemical equation: _Na + H2O --> _NaOH + _H2.

What is 2Na + 2H2O --> 2NaOH + H2?

300

This compound is formed from aluminum and oxide ions.

What is Al2O3 (aluminum oxide)?

300

This is the correct name for the compound SF6.

What is sulfur hexafluoride?

400

Write the unbalanced equation for hydrochloric acid reacting with calcium hydroxide to form calcium chloride and water.

What is HCl + Ca(OH)2 --> CaCl2 + H2O?

400

Balance the combustion of propane: C3H8 + _02 --> _CO2 + _H2O.

What is C3H8 + 5O2 --> 3CO2 + 4H2O?

400

This is the correct name for the compound FeCl3.

What is iron(III) chloride?

400

Write the formula for carbon tetrachloride.

What is CCl4?

500

Write the unbalanced chemical equation for the combustion of methane (CH4) in oxygen. 

What is CH4 + O2 --> CO2 +H2O?

500

Balance the following reaction: _AgNO3 + MgCl2 --> _AgCl + _Mg(NO3)2.

What is 2AgNO3 + MgCl2 --> 2AgCl + Mg(NO3)2?

500

Write the formula for calcium nitrate, which contains a polyatomic ion.

What is Ca(NO3)2?

500

This is the name of the compound N2S5.

What is dinitrogen pentasulfide?