Stoichiometry - The "art" of chemical measurements - the laws according to which substance unite to form chemical compounds. Stoichiometry is the relationship between the weights of the reactants and the products of a chemical reaction.
In a balanced chemical equation, the coefficients of the reactants and products are equal to the mole ratio.
CH4 + O2 > CO2 + H2O ---- balance ----> CH4 + 2O2 = CO2 + 2H2O
The mole ratio of oxygen to carbon dioxide is 2 :1
Question: How many grams of water will be produced if 0.729 grams of methane reacts with oxygene.
Answer: 0.729 grams of methane = 0.0454 moles. As we see from the balanced equation, the reaction will produce the double amount of H2O : 0.0454 moles * 2 = 0.0908 moles
Calulating we get: 18g/mole* 0.0908 mole = 1.63739 grams of H2O
Question: How many grams of water will be produced if 0.729 grams of methane reacts with oxygene.
1) In CHEMIX push the balance button
2) Insert the unbalanced equation in the unbalanced equation text field.
CH4 + O2 > CO2 + H2O
3) Argument CH4 by 0.279g (0.279 grams)
0.279gCH4 + O2
> CO2
+ H2O
4) Calculate.
Balanced: CH4 + 2O2 = CO2 + 2H2O
CH4 --> 0.0454444 moles
0.729054 grams
O2 --> 0.0908889 moles 2.90833 grams
CO2 --> 0.0454444 moles 2 grams
H2O --> 0.0908889 moles 1.63739 grams