"the same";
One mole of any given thing is 6 * 10²³ of it;
One mole of H₂O is 6 * 10²³ molecules;
One mole of O₂ is also 6 * 10²³ molecules;
Therefore for both substances, there are the same number of molecules.
Balance Fe
Fe3O4 + H2→ 3Fe + H2O
Balance O
Fe3O4 + H2→ 3Fe + 4H2O
Balance H
Fe3O4 + 4H2→ 3Fe+4H2O
Coeff of H2O=4
I would use the following steps:
- Write the <em>balanced chemical equation</em> for the reaction.
- Use the molar mass to <em>convert the mass of the reactant to moles</em>.
- Use the molar ratio of product:reactant from the balanced chemical equation to <em>convert moles of reactant to moles of product</em>.
- Use the molar mass of the product to <em>convert moles of product to mass of product</em>.
You can use the diagram below to remind you of the importance of the <em>molar ratio</em> in mass-mass conversions
You must get over the mole “hill” to make the conversion.
Answer:
they all have the same amount of kinetic energy