1.what is stoichiometry?
Stoichiometry is the application of mathematics in chemistry, in which the laws of conservation
of mass and energy and definite proportions are used. It is used to determine the relative
quantities of substances that take part in specific chemical reactions.
2.soda acid fire extinguisher is the most used type of fire extinguisher. Write down the chemical
equation of the reaction process that takes place to release carbon (ii) oxide.
2NaHCO3 +H2 SO4 →Na2 SO4 +2H2 O+2CO
3. Explain how mole ratio is used in stoichiometry.
mole ratio is used as a conversion factor between the number of moles of two different
compounds that take part in a specific chemical reaction. Therefore, it is used to calculate the
number of moles of a compound if you have the number of moles of another compound that
takes part in the same reaction.
4. What is the major step that has to be taken before solving a stoichiometric equation?
Before we can solve any stoichiometry problem, we have to ensure that the particular chemical
reaction we are dealing with is balanced.
5 Solve the following stoichiometric equation and balance it.
NH3 (g)+O2 (g) →
First, balance the number of nitrogen atoms.
2NH3(g) +O2(G) →N2 (g) + H2 O (l)
Then count the number of hydrogen atoms. There are 6 hydrogen atoms on the left, and only
two on the right side of the equation. Thus, there must be 3 moles of water.
2NH3(g) +O2(g) →N2 (g)+3H2 O (l)
And finally, balance the oxygen atoms. There are two oxygen atoms on the left, and three on
the right.
2NH3 (g) +3/2 O2(g) →N2 (g) +3H2 O (l)
Coefficients must be whole numbers, so multiply the equation by 2.
4NH3 +3O2 →2N2 +6H2 O
6. balance the following stoichiometric equation.
Mg (S)+HCl (aq)→MgCl2 (aq)+H2(g)
Stoichiometry is the application of mathematics in chemistry, in which the laws of conservation
of mass and energy and definite proportions are used. It is used to determine the relative
quantities of substances that take part in specific chemical reactions.
2.soda acid fire extinguisher is the most used type of fire extinguisher. Write down the chemical
equation of the reaction process that takes place to release carbon (ii) oxide.
2NaHCO3 +H2 SO4 →Na2 SO4 +2H2 O+2CO
3. Explain how mole ratio is used in stoichiometry.
mole ratio is used as a conversion factor between the number of moles of two different
compounds that take part in a specific chemical reaction. Therefore, it is used to calculate the
number of moles of a compound if you have the number of moles of another compound that
takes part in the same reaction.
4. What is the major step that has to be taken before solving a stoichiometric equation?
Before we can solve any stoichiometry problem, we have to ensure that the particular chemical
reaction we are dealing with is balanced.
5 Solve the following stoichiometric equation and balance it.
NH3 (g)+O2 (g) →
First, balance the number of nitrogen atoms.
2NH3(g) +O2(G) →N2 (g) + H2 O (l)
Then count the number of hydrogen atoms. There are 6 hydrogen atoms on the left, and only
two on the right side of the equation. Thus, there must be 3 moles of water.
2NH3(g) +O2(g) →N2 (g)+3H2 O (l)
And finally, balance the oxygen atoms. There are two oxygen atoms on the left, and three on
the right.
2NH3 (g) +3/2 O2(g) →N2 (g) +3H2 O (l)
Coefficients must be whole numbers, so multiply the equation by 2.
4NH3 +3O2 →2N2 +6H2 O
6. balance the following stoichiometric equation.
Mg (S)+HCl (aq)→MgCl2 (aq)+H2(g)
