Formula Writing
Chemical Equation Writing
Balancing Equations
100

This is the correct chemical formula for water.

H20

100

Hydrogen gas reacts with oxygen to form water.

2H2+O2->2H2O

100

_H2+_O2->_H2O

2H2+O2->2NaCl

200

This is the formula for sodium chloride.

NaCl

200

Sodium reacts with chlorine gas to form sodium chloride.

2Na+Cl2->2NaCl

200

_Na+_Cl2->_NaCl

2Na+Cl2->2NaCl

300

Write the formula for calcium nitrate.

Ca(NO3)2

300

Magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas.

Mg+2HCl->MgCl2+H2

300

_Fe+_O2->_Fe2O3

4Fe+3O2->2Fe2O3

400

This is the correct formula for aluminum sulfate.

Al2(SO4)3

400

Calcium carbonate decomposes into calcium oxide and carbon dioxide.

CaCO3->CaO+CO2

400

_C3H8+_O2->_CO2+_H2O

C3H8+5O2->3CO2+4H2O

500

Write the formula for ammonium phosphate.

(NH4)3PO4

500

Aluminum reacts with copper(II) sulfate to form aluminum sulfate sulfate and copper.

2Al+3CuSO4->Al2(SO4)3+3Cu

500

_Al+_HCl->_AlCl3+_H2

2Al+6HCl->2AlCl3+3H2

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