Iron reacts with steam according to the reaction 3Fe +4 H2O → Fe3O4 + 4H2O.

How many grams of iron will react with 5 moles of steam to convert to iron oxide with 100% product yield?
a. 72g b. 90g c. 168g d. 210g****

five moles steam?

Multiply the balanced equation by 5/4
15/4 Fe + 5 H2O >>>5/4 Fe3O4 + 5H2O
grams Iron= 15/4 * molemassFe=15/4 *55.8= 209 grams

D.210

To determine the grams of iron that will react with 5 moles of steam with 100% product yield, we need to use the stoichiometry of the reaction.

From the balanced chemical equation: 3Fe +4 H2O → Fe3O4 + 4H2, we can see that the ratio between iron (Fe) and water (H2O) is 3:4.

Thus, for every 3 moles of iron reacted, 4 moles of water are consumed.

To find the moles of iron in 5 moles of steam, we need to set up a proportion:

3 moles of iron / 4 moles of water = x moles of iron / 5 moles of water

Simplifying the proportion, we get:

3/4 = x/5

Cross-multiplying:

4x = 3 * 5

4x = 15

x = 15/4

x = 3.75 moles of iron

Finally, to convert moles of iron to grams, we need to use the molar mass of iron (Fe), which is 55.85 g/mol.

Grams of iron = moles of iron * molar mass of iron

Grams of iron = 3.75 moles * 55.85 g/mol

Grams of iron = 209.4375 g

Rounding to the nearest gram, the answer is approximately 210 g.

Therefore, the correct answer is d. 210g.

To find the answer, you need to use the balanced equation and the molar ratios between the reactants and products.

From the balanced equation, we can see that the molar ratio between iron and water is 3:4. This means that for every 3 moles of iron, we need 4 moles of water.

Given that you have 5 moles of water, you can use this ratio to determine the moles of iron needed:

5 moles H2O × (3 moles Fe / 4 moles H2O) = 3.75 moles Fe

Now, we can calculate the mass of iron needed by multiplying the moles of iron by its molar mass. The molar mass of iron (Fe) is approximately 55.85 g/mol.

Mass of iron = 3.75 moles Fe × 55.85 g/mol = 209.4 g

Rounded to the nearest gram, this is approximately 210 g.

Therefore, the correct answer is option d. 210g.